Condensed Matter Zoom Seminar | Anton Kapustin, Caltech | "Higher-dimensional generalizations of the Berry curvature for gapped lattice systems" Wed, Dec 16, 2020, 3:00 pm – 3:00 pm Building on the work of von Neumann and Wigner, M. Berry showed that there are topologically protected level-crossings in the space of quantum systems. These level-crossings can be detected using the curvature of the Berry connection. In this talk I will describe analogs of this for interacting lattice systems in infinite volume. Although the… Speaker Anton Kapustin Affiliation Caltech Condensed Matter Zoom Seminar | Christian Gross, U of Tuebingen | "Microscopic spin and density cross-correlations in the Hubbard systems" Wed, Dec 9, 2020, 1:00 pm – 1:00 pm Quantum gas microscopes provide experimental access to novel observables, foremost, single particle resolved multi-point correlation functions. These offer a novel microscopic window into the physics of strongly correlated many-body physics. In our setup we developed a method for the simultaneous detection of spin and… Speaker Christian Gross Affiliation U of Tuebingen, Germany Condensed Matter Zoom Seminar | Titus Neupert,UZH | "Heating and blackhole dynamics in critical Floquet systems" Wed, Nov 18, 2020, 1:00 pm – 1:00 pm While driven interacting quantum matter is generically subject to heating and scrambling, certain classes of systems evade this paradigm. I will discuss such an exceptional class in periodically driven critical (1 + 1)-dimensional systems with a spatially modulated, but disorder-free time evolution operator. Instead of complete scrambling, the… Speaker Titus Neupert Affiliation U of Zurich Condensed Matter Zoom Seminar | Jiaxin Yin | "Tunneling into emergent topological matter" Wed, Nov 11, 2020, 1:00 pm – 1:00 pm The search for topological matter is evolving towards strongly interacting systems including topological magnets and superconductors, where novel effects emerge from the quantum level interplay between geometry, correlation, and topology. Equipped with unprecedented spatial resolution, electronic detection, and… Speaker Jiaxin Yin Affiliation Princeton University Condensed Matter Zoom Seminar | Johnpierre Paglione, U of MD | "Exotic superconductivity in nearly ferromagnetic UTe2" Wed, Nov 4, 2020, 1:00 pm – 1:00 pm Topological superconductivity has attracted great interest in condensed matter physics because of its potential applications in quantum computing. Spin-triplet superconductors are one promising class that can host the topological excitations of interest, but experimental realizations are few and far between. Here we report the discovery and… Speaker Johnpierre Paglione Affiliation Dept. of Physics, U of MD Condensed Matter Zoom Seminar | Pedram Roushan, Google | " Tuning quantum information scrambling in two-dimensional systems" Wed, Oct 28, 2020, 1:30 pm – 1:30 pm The promise of quantum computers is that certain computational tasks might be executed exponentially faster on a quantum processor than on a classical processor. In 2019, we reported the use of a processor with programmable superconducting qubits to create quantum states on 53 qubits, corresponding to a computational state-space of dimension… Speaker Pedram Roushan Affiliation Google Quantum AI, California Condensed Matter Zoom Seminar | Dmitri Efetov, ICFO | "Magic Angle Bilayer Graphene - Superconductors, Orbital Magnets, Correlated States and beyond" Wed, Oct 21, 2020, 1:00 pm – 1:00 pm When twisted close to a magic relative orientation angle near 1 degree, bilayer graphene has flat moire superlattice minibands that have emerged as a rich and highly tunable source of strong correlation physics, notably the appearance of superconductivity close to interaction-induced insulating states. Here we report on the fabrication of… Speaker Dmitri Efetov Affiliation ICFO Virtual Condensed Matter Seminar | Yuan Cao, MIT | "Competing Orders, Nematicity and Novel Josephson Effects in Superconducting Graphene Superlattices" Mon, Jul 27, 2020, 2:00 pm – 2:00 pm The emergence of two-dimensional materials have provided physicists with unprecedented way of studying the motion of electrons in a superconductor. Although superconductivity itself has been studied for more than a century, the recent advances of “twistronics” research in graphene superlattices brings fundamentally new physics into the picture … Speaker Yuan Cao Affiliation MIT Condensed Matter Seminar | Alexandre Blais, Usherbrooke | "To be announced." | Joseph Henry Room Wed, Apr 22, 2020, 12:00 pm – 12:00 pm Speaker Alexandre Blais Affiliation Usherbrooke Condensed Matter Seminar | Adrian Po, MIT | "Symmetry indicators for topological superconductors" | Joseph Henry Room, Jadwin Hall Wed, Mar 11, 2020, 1:30 pm – 1:30 pm A useful guiding principle for the search of topological superconductors is to relate the topological invariants with the behavior of the pairing order parameter on the normal-state Fermi surfaces. In this talk, we will discuss how this paradigm can be integrated with the notion of symmetry indicators, which enables… Speaker Adrian Po Affiliation MIT Condensed Matter Seminar | Mikhail I. Eremets, Max Planck | "Progress in high-temperature conventional superconductivity" PCTS Seminar Room 407 Fri, Feb 28, 2020, 11:45 am – 11:45 am We studied the state of matter under extreme conditions and found new phenomena and materials, including polymeric nitrogen, transparent sodium, semimetallic hydrogen, and superconductivy in various substances. Room-temperature superconductivity is becoming realistic given dramatic progress in conventional superconductivity: the… Speaker Mikhail Eremets Affiliation Max Planck Condensed Matter Seminar | Helen Bouchiat, U of Paris Sud | "Revealing the second-order topological character of bismuth-based Josephson junction" | Joseph Henry Room Wed, Feb 19, 2020, 12:00 pm – 12:00 pm In Second-Order Topological Insulators (SOTI), bulk and surfaces are insulating while the edges or hinges conduct current in a quasi-ideal (ballistic) way, being insensitive to disorder. Crystalline bismuth has been shown to belong to this class of materials [1,2,3]. Just like the case of Quantum Spin Hall edges of 2D Topological Insulators,… Speaker Helene Bouchiat Affiliation u of Paris Sud By Year 2024 (6)2023 (8)2022 (5)2021 (13)2020 (12)(selected)2019 (10)2018 (12)2017 (23)2016 (34)2015 (33)2014 (23)2013 (27)2012 (26)2011 (14)2010 (12) By Category Astroparticle SeminarAtomic Physics SeminarBiophysics SeminarCondensed Matter SeminarDark Cosmo SeminarDistinguished Lecture SeriesDonald R. Hamilton ColloquiumDonald R. Hamilton LectureEquity Diversity and Inclusion InitiativeFPOGravity Group SeminarGravity Initiative SeminarHigh Energy Experiment SeminarHigh Energy Theory SeminarMathematical Physics SeminarParticle Physics SeminarPCTS SeminarPhenomenology SeminarPrinceton Quantum ColloquiumQuantum InitiativeSpecial EventSpecial SeminarStatistical Mechanics Seminar