{"id":1157,"date":"2019-08-08T11:38:21","date_gmt":"2019-08-08T09:38:21","guid":{"rendered":"https:\/\/wp.icmm.csic.es\/npqsic\/?page_id=1157"},"modified":"2022-09-28T11:07:50","modified_gmt":"2022-09-28T09:07:50","slug":"other-activities","status":"publish","type":"page","link":"https:\/\/wp.icmm.csic.es\/npqsic\/other-activities\/","title":{"rendered":"Other activities"},"content":{"rendered":"<div id=\"pl-1157\"  class=\"panel-layout\" ><div id=\"pg-1157-0\"  class=\"panel-grid panel-no-style\" ><div id=\"pgc-1157-0-0\"  class=\"panel-grid-cell\" ><div id=\"panel-1157-0-0-0\" class=\"so-panel widget widget_siteorigin-panels-postloop panel-first-child\" data-index=\"0\" >\n\t<article id=\"post-1892\" class=\"post-1892 post type-post status-publish format-standard has-post-thumbnail hentry category-other-activities\">\n\t\t<header class=\"entry-header\">\n\t\t\t\t<h2 class=\"entry-title\"><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/group-seminar-controlling-topological-phases-of-matter-with-quantum-light\/\" title=\"Enlace permanente a Group Seminar: Controlling Topological Phases of Matter with Quantum Light\" rel=\"bookmark\">Group Seminar: Controlling Topological Phases of Matter with Quantum Light<\/a><\/h2>\n\t\t\t\t<div class=\"entry-meta\">\n\t\t\t\t\t<\/div><!-- .entry-meta -->\n\t\t<\/header><!-- .entry-header -->\n\t\t\t\t<div class=\"entry-content\">\n\t\t\t<p><strong>Olesia Dmytruk<\/strong>, from the CNRS, Coll\u00e8ge de France, PSL Research University, Paris<\/p>\n<p><strong>Date: November 22, 2022, 12:00h<\/strong><\/p>\n<p><strong>Location:&nbsp;<\/strong>Instituto de Ciencias de Materiales de Madrid (ICMM-CSIC), Sal\u00f3n de Actos<\/p>\n<p><strong>Abstract:<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-1925 alignright\" src=\"https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2022\/11\/Fig1-01-220x300.png\" alt=\"\" width=\"277\" height=\"378\" srcset=\"https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2022\/11\/Fig1-01-220x300.png 220w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2022\/11\/Fig1-01-751x1024.png 751w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2022\/11\/Fig1-01-768x1047.png 768w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2022\/11\/Fig1-01-1127x1536.png 1127w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2022\/11\/Fig1-01-110x150.png 110w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2022\/11\/Fig1-01.png 1343w\" sizes=\"auto, (max-width: 277px) 100vw, 277px\" \/><\/p>\n<p style=\"text-align: left\">Controlling the topological properties of quantum matter is a major goal of condensed matter physics. A major effort in this direction has been devoted to using classical light in the form of Floquet drives to manipulate and induce states with non-trivial topology. A different route can be achieved with cavity photons. In this talk, I will discuss a prototypical model for topological phase transition, the one-dimensional Su-Schrieffer-Heeger (SSH) model, coupled to a single mode cavity [1]. I will demonstrate that quantum light can affect the topological properties of the system, including the finite-length energy spectrum hosting edge modes and the topological phase diagram. In particular, I will show that depending on the lattice geometry and the strength of light-matter coupling one can either turn a trivial phase into a topological one or vice versa using quantum cavity fields. Furthermore, the polariton spectrum of the coupled electron-photon system contains signatures of the topological phase transition in the SSH model.<\/p>\n<hr>\n<p><strong>References:<\/strong><\/p>\n<p>[1] Olesia Dmytruk and Marco Schir\u00f3, Controlling topological phases of matter with quantum light,&nbsp;<a href=\"https:\/\/arxiv.org\/abs\/2204.05922\">arXiv:2204.05922<\/a>.<\/p>\n\t\t\t\t\t<\/div><!-- .entry-content -->\n\t\t\t\t<footer class=\"entry-meta\">\n\t\t\t<span class=\"entry-format\"><i class=\"crycon-aside\" title=\"Minientrada\"><\/i><\/span>\n\t\t\t\t\t<\/footer>\n\n\t<\/article><!-- #post-1892 -->\n\n\t<article id=\"post-1795\" class=\"post-1795 post type-post status-publish format-standard has-post-thumbnail hentry category-other-activities\">\n\t\t<header class=\"entry-header\">\n\t\t\t\t<h2 class=\"entry-title\"><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/group-seminar-illuminating-van-der-waals-materials-from-graphene-to-twisted-mos2\/\" title=\"Enlace permanente a Group Seminar: Illuminating van der Waals materials: from graphene to twisted  MoS2\" rel=\"bookmark\">Group Seminar: Illuminating van der Waals materials: from graphene to twisted  MoS2<\/a><\/h2>\n\t\t\t\t<div class=\"entry-meta\">\n\t\t\t\t\t<\/div><!-- .entry-meta -->\n\t\t<\/header><!-- .entry-header -->\n\t\t\t\t<div class=\"entry-content\">\n\t\t\t<p style=\"text-align: left\"><strong>Marta Prada, <\/strong>from the Institute for Theoretical Physics, Universit\u00e4t Hamburg, will give a seminar entitled <strong><span style=\"color: #8eaebd\">\u00abIlluminating van der Waals materials: from graphene to twisted MoS2\u00bb.<\/span><\/strong><\/p>\n<p><strong>Date: October 11th, 2022, 11:00h.<\/strong><\/p>\n<p><strong>Location: <\/strong>Instituto de Ciencias Materiales de Madrid (ICMM-CSIC)<\/p>\n<p>We address the low-lying energy levels of van-der Waals structures via resistively-detected electron spin resonance (ESR). In graphene, the structure of the topological bands is reflected in transport experiments, where our numerical models allow us to identify the resonance signatures. We resolve the intrinsic spin-orbit gap [1], the g-factor anisotropic corrections [2, 3], the sub-lattice splitting [4], and the hyperfine-induced splitting in 13C-based graphene [5]. Using Floquet formalism, we find theoretical evidence of a topological transition by illuminating an ideal sample of graphene and the connection between angular momentum and sublattice spin. Finally, we study twisted MoS2 samples, where we resolve low-lying Moir\u00e9 bands near the conduction band.<\/p>\n<p style=\"text-align: left\">Keywords: Twisted bilayer MoS2, Moir\u00e9, superlattices, Mini-bands, Schottky barrier, Resonant Tunneling,<br \/>\nTransition metal dichalcogenides<\/p>\n<p>[1] J. Sichau, M. Prada, T. Anlauf, T. J. Lyon, B. Bosnjak, L. Tiemann, and R. H. Blick, Phys. Rev. Lett. 122, 046402 (2019).<br \/>\n[2] M. Prada, L. Tiemann, J. Sichau and R. H. Blick. Phys. Rev. B 104, 075401 (2021).<br \/>\n[3] M. Prada, Phys. Rev. B 103, 115425 (2021).<br \/>\n[4] R. Singh, M. Prada, V. Strenzke, B. Bosnjak, T. Schmirander, Lars Tiemann, and Robert H. Blick. Phys. Rev. B 102, 245134 (2020).<br \/>\n[5] V. Strenzke, Phys. Rev. B 105, 144303 (2022).<\/p>\n\t\t\t\t\t<\/div><!-- .entry-content -->\n\t\t\t\t<footer class=\"entry-meta\">\n\t\t\t<span class=\"entry-format\"><i class=\"crycon-aside\" title=\"Minientrada\"><\/i><\/span>\n\t\t\t\t\t<\/footer>\n\n\t<\/article><!-- #post-1795 -->\n\n\t<article id=\"post-1789\" class=\"post-1789 post type-post status-publish format-standard has-post-thumbnail hentry category-other-activities\">\n\t\t<header class=\"entry-header\">\n\t\t\t\t<h2 class=\"entry-title\"><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/seminar-introduction-to-machine-learning-and-its-applications-in-scientific-research\/\" title=\"Enlace permanente a Seminar: \u00abIntroduction to machine learning and its applications in scientific research\" rel=\"bookmark\">Seminar: \u00abIntroduction to machine learning and its applications in scientific research<\/a><\/h2>\n\t\t\t\t<div class=\"entry-meta\">\n\t\t\t\t\t<\/div><!-- .entry-meta -->\n\t\t<\/header><!-- .entry-header -->\n\t\t\t\t<div class=\"entry-content\">\n\t\t\t<p><strong>Lamberto Oltra Nieto,<\/strong> a member of our group, will give a seminar entitled <strong><span style=\"color: #8eaebd\">\u00abIntroduction to machine learning and its applications in scientific research\u00bb<\/span><\/strong>.<\/p>\n<p><strong>Date: March 9th, 2022, 10:00 h. <\/strong><\/p>\n<p><strong>Location<\/strong>: online<\/p>\n<p><strong>Abstract<\/strong>: Nowadays, the importance of new technologies, more specifically artificial intelligence, in science is undeniable and must be taken into account in new scientific research. This seminar aims to be an introduction to the basics of machine learning with the objective of highlighting this importance in research. Applications in various fields such as error correction in different quantum systems or material research will also be discussed.<\/p>\n\t\t\t\t\t<\/div><!-- .entry-content -->\n\t\t\t\t<footer class=\"entry-meta\">\n\t\t\t<span class=\"entry-format\"><i class=\"crycon-aside\" title=\"Minientrada\"><\/i><\/span>\n\t\t\t\t\t<\/footer>\n\n\t<\/article><!-- #post-1789 -->\n\n\t<article id=\"post-1784\" class=\"post-1784 post type-post status-publish format-standard has-post-thumbnail hentry category-other-activities\">\n\t\t<header class=\"entry-header\">\n\t\t\t\t<h2 class=\"entry-title\"><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/seminar-hole-spin-qubits-in-elongated-quantum-dots\/\" title=\"Enlace permanente a Seminar: \u00abHole spin qubits in elongated quantum dots\u00bb\" rel=\"bookmark\">Seminar: \u00abHole spin qubits in elongated quantum dots\u00bb<\/a><\/h2>\n\t\t\t\t<div class=\"entry-meta\">\n\t\t\t\t\t<\/div><!-- .entry-meta -->\n\t\t<\/header><!-- .entry-header -->\n\t\t\t\t<div class=\"entry-content\">\n\t\t\t<p><span style=\"color: #cf6766\"><strong>M\u00f3nica Benito<\/strong><\/span><strong>,<\/strong> from the Institute of Quantum Technologies,&nbsp;German Aerospace Center&nbsp;(DLR), Ulm, will give a seminar entitled <strong><span style=\"color: #8eaebd\">\u00abHole spin qubits in elongated quantum dots\u00bb<\/span><\/strong>.<\/p>\n<p><strong>Date: March 9th, 2022, 11:00 h. <\/strong><\/p>\n<p><strong>Location<\/strong>: Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC)<\/p>\n<p><strong>Abstract<\/strong>: Rapid development has positioned quantum wells in planar germanium heterostructures at the head of semiconductor quantum dot platforms for quantum information processing [1,2]. We find nuclear-spin-free isotopes, low charge noise and low disorder. The focus is on hole states, due to the absence of valley states, a technically advantageous low effective mass, and the strong spin-orbit coupling that allows for all-electric operation. These works employ heavy-hole spin qubits, which constitute the ground states in these planar devices. Theory predicts an even more promising future for germanium and\/or silicon based quantum dots fabricated in nanowires, based on tunable and even stronger spin-orbit coupling relying on the high degree of heavy-light hole mixtures [3]. I will present recent theoretical efforts to understand and experimentally identify the low-energy physics of hole germanium nanowires, including the effect of orbital effects of the magnetic field [4]. We predict optimal qubit operation at a sweet spot with Rabi frequencies in the GHz regime. We find that they can present strong and tunable spin-orbit coupling if the confinement potential is properly squeezed [5]. This confinement-induced spin-orbit coupling, and therefore the qubit-resonator coupling, could be turned on and off, overcoming present scalability challenges.<br \/>\n[1] Hendrickx et al., Nature 591, 580 (2021)<br \/>\n[2] F. van Riggelen, et al., arXiv:2202.11530<br \/>\n[3] C. Kloeffel, et al., Phys. Rev. B 84, 195314 (2011)<br \/>\n[4] C. Adelsberger, M. Benito, S. Bosco, J. Klinovaja, and D. Loss, PRB 105, 075308 (2022)<br \/>\n[5] S. Bosco, M. Benito, C. Adelsberger, and D. Loss, PRB 104, 115425 (2021)<\/p>\n\t\t\t\t\t<\/div><!-- .entry-content -->\n\t\t\t\t<footer class=\"entry-meta\">\n\t\t\t<span class=\"entry-format\"><i class=\"crycon-aside\" title=\"Minientrada\"><\/i><\/span>\n\t\t\t\t\t<\/footer>\n\n\t<\/article><!-- #post-1784 -->\n\n\t<article id=\"post-1782\" class=\"post-1782 post type-post status-publish format-standard hentry category-other-activities\">\n\t\t<header class=\"entry-header\">\n\t\t\t\t<h2 class=\"entry-title\"><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/seminar-entanglement-generation-and-simulation-of-relativistic-effects-with-parametric-oscillators-in-cqed\/\" title=\"Enlace permanente a Seminar: \u00abEntanglement generation and simulation of relativistic effects with parametric oscillators in cQED\u00bb\" rel=\"bookmark\">Seminar: \u00abEntanglement generation and simulation of relativistic effects with parametric oscillators in cQED\u00bb<\/a><\/h2>\n\t\t\t\t<div class=\"entry-meta\">\n\t\t\t\t\t<\/div><!-- .entry-meta -->\n\t\t<\/header><!-- .entry-header -->\n\t\t\t\t<div class=\"entry-content\">\n\t\t\t<p><span style=\"color: #cf6766\"><strong>David Fern\u00e1ndez<\/strong><\/span><strong>,<\/strong> from Instituto de F\u00edsica Fundamental (IFF-CSIC), will give a seminar entitled <strong><span style=\"color: #8eaebd\">\u00abEntanglement generation and simulation of relativistic effects with parametric oscillators in cQED\u00bb<\/span><\/strong>.<\/p>\n<p><strong>Date: February 23rd, 2022, 11:00 h. <\/strong><\/p>\n<p><strong>Location<\/strong>: Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC)<\/p>\n<p><strong>Abstract<\/strong>: Present day quantum technologies aim at building quantum computers and networks that outperform their classical counterparts. From a physical perspective, these technologies need to be systems whose parameters are modified in real time, so that a programable sequence of operations is performed to deliver different quantum applications. Then, it is only natural to consider parametric oscillators as a primitive for these devices. In this seminar, we will discuss the basics of parametric oscillators in superconducting circuits and their applications to two promising topics: Firstly, the generation of multipartite entanglement thanks to the parametric amplification of vacuum in microwave one-dimensional cavities. Additionally, we will introduce protocols for the detection of said entanglement, which lead to connections in open questions in quantum information theory. Secondly, we will present superconducting circuits designed for the analog simulation of relativistic phenomena such as the Unruh and dynamical Casimir effects.<\/p>\n\t\t\t\t\t<\/div><!-- .entry-content -->\n\t\t\t\t<footer class=\"entry-meta\">\n\t\t\t<span class=\"entry-format\"><i class=\"crycon-aside\" title=\"Minientrada\"><\/i><\/span>\n\t\t\t\t\t<\/footer>\n\n\t<\/article><!-- #post-1782 -->\n\n\t<article id=\"post-1750\" class=\"post-1750 post type-post status-publish format-standard has-post-thumbnail hentry category-other-activities category-pico-cortes tag-otheractivities\">\n\t\t<header class=\"entry-header\">\n\t\t\t\t<h2 class=\"entry-title\"><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/thesis-defense-ac-dynamics-of-quantum-dots-and-josephson-junctions-for-quantum-technologies\/\" title=\"Enlace permanente a Thesis Defense: \u00abAC Dynamics of Quantum Dots and Josephson Junctions for Quantum Technologies\u00bb, by Jordi Pic\u00f3 Cort\u00e9s\" rel=\"bookmark\">Thesis Defense: \u00abAC Dynamics of Quantum Dots and Josephson Junctions for Quantum Technologies\u00bb, by Jordi Pic\u00f3 Cort\u00e9s<\/a><\/h2>\n\t\t\t\t<div class=\"entry-meta\">\n\t\t\t\t\t<\/div><!-- .entry-meta -->\n\t\t<\/header><!-- .entry-header -->\n\t\t\t\t<div class=\"entry-content\">\n\t\t\t\t\t\t\t\t<\/div><!-- .entry-content -->\n\t\t\t\t<footer class=\"entry-meta\">\n\t\t\t<span class=\"entry-format\"><i class=\"crycon-aside\" title=\"Minientrada\"><\/i><\/span>\n\t\t\t\t\t<\/footer>\n\n\t<\/article><!-- #post-1750 -->\n\n\t<article id=\"post-1707\" class=\"post-1707 post type-post status-publish format-standard has-post-thumbnail hentry category-other-activities tag-otheractivities\">\n\t\t<header class=\"entry-header\">\n\t\t\t\t<h2 class=\"entry-title\"><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/group-seminar-hole-spin-qubits-manipulation-with-shortcuts-to-adiabaticity-protocols-david-fernandez\/\" title=\"Enlace permanente a Group Seminar: \u00abHole spin qubits manipulation with shortcuts to adiabaticity protocols\u00bb, David Fern\u00e1ndez\" rel=\"bookmark\">Group Seminar: \u00abHole spin qubits manipulation with shortcuts to adiabaticity protocols\u00bb, David Fern\u00e1ndez<\/a><\/h2>\n\t\t\t\t<div class=\"entry-meta\">\n\t\t\t\t\t<\/div><!-- .entry-meta -->\n\t\t<\/header><!-- .entry-header -->\n\t\t\t\t<div class=\"entry-content\">\n\t\t\t<p><span style=\"color: #cf6766\"><strong>David Fern\u00e1ndez<\/strong><\/span><strong>,<\/strong> a MSC student in our group, will give a seminar entitled <strong><span style=\"color: #8eaebd\">\u00abHole spin qubits manipulation with shortcuts to adiabaticity protocols\u00bb<\/span><\/strong>, as part of the group seminars.<\/p>\n<p><strong>Date: June 8th, 2021, 10:30 h. <\/strong><\/p>\n<p><strong>Location<\/strong>: online<\/p>\n<p><strong>Abstract<\/strong>: Hole spins in semiconductor QDs are also attracting significant attention as candidates for fast, highly co-<br \/>\nherent, spin qubits. They have long coherence time due to the weak hyperfine coupling to nuclear spins , and have demonstrated to have rapid operation times due to the inherently strong spin\u2013orbit coupling (SOC), which also allows spin states to be controlled locally with electric fields applied to the gate electrodes.<br \/>\nRecently, Landau Zener St\u00fcckelberg Majorana spectroscopy on two-hole GaAs double quantum dot has been experimentally implemented. Motivated by these experiments, we investigate how to control and manipulate a spin qubit consisting on a triplet and a singlet hole state, by alternative driving protocols which reduce the otherwise unavoidable presence of charge noise. Shortcuts to adiabaticity (STA) are a set of techniques to reduce the duration of slow adiabatic processes, minimizing noise effects while keeping or enhancing robustness. Different driving protocols have been developed, which reduce the time of the process below characteristic decoherence times. Here we will consider the fast quasi-adiabatic (FAQUAD) approach and we will analyze its feasibility to manipulate hole spin qubits and compare with other alternative protocols.<\/p>\n\t\t\t\t\t<\/div><!-- .entry-content -->\n\t\t\t\t<footer class=\"entry-meta\">\n\t\t\t<span class=\"entry-format\"><i class=\"crycon-aside\" title=\"Minientrada\"><\/i><\/span>\n\t\t\t\t\t<\/footer>\n\n\t<\/article><!-- #post-1707 -->\n\n\t<article id=\"post-1678\" class=\"post-1678 post type-post status-publish format-standard has-post-thumbnail hentry category-other-activities tag-otheractivities\">\n\t\t<header class=\"entry-header\">\n\t\t\t\t<h2 class=\"entry-title\"><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/thesis-defense-quantum-dynamics-in-low-dimensional-topological-systems\/\" title=\"Enlace permanente a Thesis Defense: \u00abQuantum dynamics in low-dimensional topological systems\u00bb\" rel=\"bookmark\">Thesis Defense: \u00abQuantum dynamics in low-dimensional topological systems\u00bb<\/a><\/h2>\n\t\t\t\t<div class=\"entry-meta\">\n\t\t\t\t\t<\/div><!-- .entry-meta -->\n\t\t<\/header><!-- .entry-header -->\n\t\t\t\t<div class=\"entry-content\">\n\t\t\t<p>On January 30th, we attended the <span style=\"color: #cf6766\"><strong>Thesis Defense<\/strong><\/span> of one of our PhD students, <span style=\"color: #8eaebd\"><strong>Miguel Bello<\/strong><\/span>, entitled <span style=\"color: #cf6766\"><strong>\u00abQuantum dynamics in low-dimensional topological systems\u00bb<\/strong><\/span>.&nbsp;<\/p>\n<p><span style=\"color: #8eaebd\"><strong>Abstract<\/strong><\/span>: The discovery of topological matter has revolutionized the field of condensed matter physics giving rise to many interesting phenomena, and fostering the development of new quantum technologies. In this thesis we study the quantum dynamics that take place in low dimensional topological systems, specifically 1D and 2D lattices that are instances of topological insulators. First, we study the dynamics of doublons, bound states of two fermions that appear in systems with strong Hubbard-like interactions. We also include the effect of periodic drivings and investigate how the interplay between interaction and driving produces novel phenomena. Prominent among these are the disappearance of topological edge states in the SSH-Hubbard model, the sublattice confinement of&nbsp; doublons in certain 2D lattices, and the long-range transfer of doublons between the edges of any finite lattice. Then, we apply our insights about topological&nbsp; insulators to a rather different setup: quantum emitters coupled to the photonic analogue of the SSH model. In this setup we compute the dynamics of the emitters, regarding the photonic SSH model as a collective structured bath. We find that the topological nature of the bath reflects itself in the photon bound states and the effective dipolar interactions between the emitters. Also, the topology of the bath affects the single-photon scattering properties. Finally, we peek into the&nbsp;<br \/>\npossibility of using these kinde of setups for the simulation of spin Hamiltonians and discuss the different ground states that the system supports.<\/p>\n\t\t\t\t\t<\/div><!-- .entry-content -->\n\t\t\t\t<footer class=\"entry-meta\">\n\t\t\t<span class=\"entry-format\"><i class=\"crycon-aside\" title=\"Minientrada\"><\/i><\/span>\n\t\t\t\t\t<\/footer>\n\n\t<\/article><!-- #post-1678 -->\n\n\t<article id=\"post-1671\" class=\"post-1671 post type-post status-publish format-standard has-post-thumbnail hentry category-other-activities tag-otheractivities\">\n\t\t<header class=\"entry-header\">\n\t\t\t\t<h2 class=\"entry-title\"><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/seminar-probing-the-quantum-mechanics-of-many-body-chaos-klaus-ritcher\/\" title=\"Enlace permanente a Seminar: \u00abProbing the Quantum Mechanics of Many-Body Chaos\u00bb, Klaus Ritcher\" rel=\"bookmark\">Seminar: \u00abProbing the Quantum Mechanics of Many-Body Chaos\u00bb, Klaus Ritcher<\/a><\/h2>\n\t\t\t\t<div class=\"entry-meta\">\n\t\t\t\t\t<\/div><!-- .entry-meta -->\n\t\t<\/header><!-- .entry-header -->\n\t\t\t\t<div class=\"entry-content\">\n\t\t\t<p><span style=\"color: #cf6766\"><strong><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1676 alignleft\" src=\"https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2020\/01\/ritcher-228x300.png\" alt=\"\" width=\"228\" height=\"300\" srcset=\"https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2020\/01\/ritcher-228x300.png 228w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2020\/01\/ritcher-114x150.png 114w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2020\/01\/ritcher.png 326w\" sizes=\"auto, (max-width: 228px) 100vw, 228px\" \/>Klaus Ritcher<\/strong><\/span><strong>, <\/strong>from Regensburg University, will give a seminar entitled<strong><span style=\"color: #8eaebd\">\u00abProbing the Quantum Mechanics of Many-Body Chaos\u00bb<\/span><\/strong>, as part of the seminar series of the Theory and Simulation of Materiales, organized by \u00c1lvaro G\u00f3mez-Le\u00f3n and Sigmund Kohler.&nbsp;<\/p>\n<p><strong>Date: January 31st, 2020, 12:00 h. <\/strong><\/p>\n<p><strong>Location<\/strong>: Events room. Instituto de Ciencia de Materiales de Madrid.<\/p>\n<p><strong>Abstract<\/strong>: The dynamics and spread of quantum information in complex many-body systems is presently attracting a lot of attention across various fields, ranging from cold atom physics via condensed quantum matter to high energy physics and quantum gravity. This includes questions of how a quantum system thermalizes and phenomena like many-body interference and localization, more generally non-classicality in many-particle quantum physics. Here concepts that are based on echoes, i.e. \u00abrewinding\u00bb time, provide a powerful way to monitor complex quantum dynamics and its stability. Central to these developments are so-called out-of-time-order correlators (OTOCs) as sensitive probes for chaos and the temporal growth of complexity in interacting systems. We will address such phenomena for quantum critical and quantum chaotic systems using semiclassical path integral techniques based on interfering Feynman paths, thereby bridging the classical and quantum many-body world. These methods enable us to compute echoes and OTOCs including entanglement and correlation effects. Moreover, on the numerical side we devise a semiclassical method for Bose-Hubbard systems far-out-of equilibrium that allows us to calculate many-body quantum interference on time scales far beyond the famous Ehrenfest\/scrambling time.<\/p>\n\t\t\t\t\t<\/div><!-- .entry-content -->\n\t\t\t\t<footer class=\"entry-meta\">\n\t\t\t<span class=\"entry-format\"><i class=\"crycon-aside\" title=\"Minientrada\"><\/i><\/span>\n\t\t\t\t\t<\/footer>\n\n\t<\/article><!-- #post-1671 -->\n\n\t<article id=\"post-1566\" class=\"post-1566 post type-post status-publish format-standard has-post-thumbnail hentry category-other-activities tag-otheractivities\">\n\t\t<header class=\"entry-header\">\n\t\t\t\t<h2 class=\"entry-title\"><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/5th-school-conference-spin-based-quantum-information-processing\/\" title=\"Enlace permanente a 5th School &amp; Conference: \u00abSpin-based Quantum Information Processing\u00bb\" rel=\"bookmark\">5th School &amp; Conference: \u00abSpin-based Quantum Information Processing\u00bb<\/a><\/h2>\n\t\t\t\t<div class=\"entry-meta\">\n\t\t\t\t\t<\/div><!-- .entry-meta -->\n\t\t<\/header><!-- .entry-header -->\n\t\t\t\t<div class=\"entry-content\">\n\t\t\t<p>&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1576 alignleft\" src=\"https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/11\/flyer_SpinQubit5_p1-212x300.jpg\" alt=\"\" width=\"212\" height=\"300\" srcset=\"https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/11\/flyer_SpinQubit5_p1-212x300.jpg 212w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/11\/flyer_SpinQubit5_p1-768x1086.jpg 768w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/11\/flyer_SpinQubit5_p1-724x1024.jpg 724w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/11\/flyer_SpinQubit5_p1-106x150.jpg 106w, https:\/\/wp.icmm.csic.es\/npqsic\/wp-content\/uploads\/sites\/51\/2019\/11\/flyer_SpinQubit5_p1.jpg 1414w\" sizes=\"auto, (max-width: 212px) 100vw, 212px\" \/>The <strong><span style=\"color: #cf6766\">5th School and Conference on Spin-Based Quantum Information&nbsp; <\/span><\/strong><strong><span style=\"color: #cf6766\">Processing<\/span><\/strong> (Spin Qubit 5) brings together world-leading researchers from the fields of solid state physics and spin-based quantum&nbsp; information processing to participate in a 1-day school and a 5-day&nbsp; conference in Donostia \/ San Sebastian, Basque Country (Spain).<\/p>\n<p>The topics will cover different spin-based quantum bit implementations&nbsp; such as colour centres in diamond and SiC, donors in silicon,&nbsp; gate-defined quantum dots in GaAs, SiGe and MOS-Si, and self-assembled&nbsp; InGaAs quantum dots. There will also be some focus on fabrication,&nbsp; algorithms, and cryogenic control electronics.<\/p>\n<p>This conference is chaired by <strong><span style=\"color: #8eaebd\">Prof. Daniel Loss<\/span><\/strong> and co-chaired by <strong><span style=\"color: #8eaebd\">Prof. Gloria Platero<\/span><\/strong> and <strong><span style=\"color: #8eaebd\">Dr. Vitaly Golovach<\/span><\/strong>. The local organizing&nbsp; committee consists of <strong><span style=\"color: #8eaebd\">Prof. Andres Arnau<\/span><\/strong> and <strong><span style=\"color: #8eaebd\">Dr. Vitaly Golovach<\/span><\/strong>.<\/p>\n\t\t\t\t\t<\/div><!-- .entry-content -->\n\t\t\t\t<footer class=\"entry-meta\">\n\t\t\t<span class=\"entry-format\"><i class=\"crycon-aside\" title=\"Minientrada\"><\/i><\/span>\n\t\t\t\t\t<\/footer>\n\n\t<\/article><!-- #post-1566 -->\n<\/div><div id=\"panel-1157-0-0-1\" class=\"so-panel widget widget_sow-social-media-buttons panel-last-child\" data-index=\"1\" ><div\n\t\t\t\n\t\t\tclass=\"so-widget-sow-social-media-buttons so-widget-sow-social-media-buttons-flat-e7b7b3e181d4-1566\"\n\t\t\t\n\t\t>\n\n<div class=\"social-media-button-container\">\n\t\n\t\t<a \n\t\tclass=\"ow-button-hover sow-social-media-button-x-twitter-0 sow-social-media-button\" title=\"NOVEL PLATFORMS AND NANO-DEVICES FOR QUANTUM SIMULATION AND COMPUTATION en X Twitter\" aria-label=\"NOVEL PLATFORMS AND NANO-DEVICES FOR QUANTUM SIMULATION AND COMPUTATION en X Twitter\" target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\/\/twitter.com\/\" \t\t>\n\t\t\t<span>\n\t\t\t\t\t\t\t\t<span class=\"sow-icon-fontawesome sow-fab\" data-sow-icon=\"&#xe61b;\"\n\t\t \n\t\taria-hidden=\"true\"><\/span>\t\t\t\t\t\t\t<\/span>\n\t\t<\/a>\n\t<\/div>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Group Seminar: Controlling Topological Phases of Matter with Quantum Light Olesia Dmytruk, from the CNRS, Coll\u00e8ge de France, PSL Research University, Paris Date: November 22, 2022, 12:00h Location:&nbsp;Instituto de Ciencias de Materiales de Madrid (ICMM-CSIC), Sal\u00f3n de Actos Abstract: Controlling the topological properties of quantum matter is a major goal&#8230;<\/p>\n<p class=\"continue-reading-button\"> <a class=\"continue-reading-link\" href=\"https:\/\/wp.icmm.csic.es\/npqsic\/other-activities\/\">Continue reading<i class=\"crycon-right-dir\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"ngg_post_thumbnail":0,"footnotes":""},"class_list":["post-1157","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/pages\/1157","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/comments?post=1157"}],"version-history":[{"count":6,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/pages\/1157\/revisions"}],"predecessor-version":[{"id":1836,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/pages\/1157\/revisions\/1836"}],"wp:attachment":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/media?parent=1157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}