Condensed Matter Physics More is Different N 10 23 Hierachical - PowerPoint PPT Presentation

Condensed Matter Physics “More is Different” N ≃ 10 23 Hierachical Structure of Science P . W. Anderson F = E − TS Science, 177, 393 (1972) ���� ���� ւ ց Broken Symmetry & Emergence “New Phases of Matter” “Restore Symmetry” λ = h h “Quantum Condensates” p = √ 2 mk B T

Condensed Matter Physics “More is Different” N ≃ 10 23 Hierachical Structure of Science P . W. Anderson F = E − TS Science, 177, 393 (1972) ���� ���� ւ ց Broken Symmetry & Emergence “New Phases of Matter” “Restore Symmetry” λ = h h “Quantum Condensates” p = √ 2 mk B T A New Organizing Principle − → “Topological Order” Topological Insulators & Superconductors ◮ Quantum Hall Effect Bulk-Edge Correspondence ◮ σ Hall = N e 2 Edge States & Quantized Transport ◮ h Majorana Fermions with non-abelian statistics ◮ Topologically protected quantum computing ◮ Over 200 classes of topological materials ... almost all undiscovered!

Theoretical Condensed Matter Research ◮ Topological Quantum Matter: Insulators, Semi-Metals, Superconductors & Superfluid 3 He ◮ Quantum Theory of Macroscopic Systems - Circuit Quantum Electrodynamics ◮ Quantum Phase Transitions in “Open Quantum Systems” of Photons and Matter ◮ Foundations of Quantum Theory - Tests of Hidden Variables ◮ Spontaneous Symmetry Breaking: Spinor BEC to Exotic Superconductivity ◮ Quantum Matter under Extreme Conditions: Ultra-High Fields & Strong Gravity ◮ Far from Equilibrium : Quantum Turbulence & Non-Equilibrium Phase Transitions Superconductivity: Cavities for Particle Accelerators & Quantum Computing ◮

Theoretical Condensed Matter Physics Faculty: Anupam Garg Pallab Goswami Jens Koch Jim Sauls

Theoretical Condensed Matter Physics Faculty: Anupam Garg Pallab Goswami Jens Koch Jim Sauls Graduate Students: M. Abedelhafez Brian Baker Jason He Ziwen Huang Wei-Ting Lin Robert Regan Alex Tyner Xinyuan You Danny Weiss New Student Senior Research Collaborators: Post-Docs: Shouvik Sur Wave Ngampruetikorn Mehdi Zarea Oleksii Shevtsov Peter Groszkowski Ivar Martin Anna Grassellino Alex Romanenko

Research Group - Anupam Garg Molecular Nanomagnets Collective Spin Dynamics Iso-energetic magnetization relaxation Demag, hole digging & hysteresis protocols Avinash Vijayaraghavan (PhD 2011) Erik Lenferink (NU) Yun Liu (UIUC) Spin Semi-Classical Dynamics Motivation: Data for tunneling of SMMs Weyl ”ordering” & Wigner function for Spin Coherent-state Path Integration for Spin Carol Braun (PhD 2011) Feifei Li (Post-Doc) Yun Liu, Mike Stone (UIUC) Tony Jin, (Exchange Student, Paris)

Research Group - Pallab Goswami ◮ Topological and Geometric Properties of Quantum Materials ◮ Phase Transitions ◮ Strongly Interacting and Disordered Systems Quantum Critcal anomalous Nernst efect of Weyl fermions in Co Mn ₂ G G a a Nat. Phys. July 31, 2018

Research Group - Jens Koch Quantum Simulators Superconducting Quantum Circuits ◮ Quantized Energy Levels of the Circuit ◮ Theory of Quantum Computation ◮ J. Koch et al., PRL 103, 217004 (2009) ◮ Interacting photons in µ -wave Cavities

Research Group - Jim Sauls Current & Future Research - NSF-DMR program Topological Phases of Quantum Matter Chiral Superconductors & Superfluids ◮ Signatures of Majorana & Weyl Fermions ◮ Signatures: Anomalous Hall Effects ◮ Non-equilibrium Dynamics of Topological ◮ Chiral Anomalies in Superfluid 3 He Edge and Surface States ◮ B-T Phase Diagrams of Chiral Superconductors ◮ Interactions in Topological Quantum Matter: ◮ Higgs Modes of Chiral & Nematic Ground States Emergent Bosonic Excitations Current & Future Research - DOE & NSF-PHY programs Matter & Fields under Extreme Conditions Superconductivity under Extreme Conditions ◮ Topological Defects in Quantum Matter ◮ Theory: Accelerating field of SC RF Cavities ◮ Theory of the Kibble-Zurek Mechanism ◮ Theory: Non-Equlibrium Superconductivity ◮ Neutrino Transport: Neutron Star (NS) Cooling ◮ Transport in Superconducting Quantum Circuits ◮ Non-equilibrium Phase Transitions in NS ◮ Quantum Spintronics with Superconductors CAPST: Center for Applied Physics & Superconducting Technologies

Northwestern-Fermilab Center for Applied Physics & Superconducting Technologies

Quantum Computing Q < 10 8 State-of-the-art Q > 10 11 Northwestern-Fermilab Center for Applied Physics & Improving coherence of 3D qubits Superconducting Technologies using SRF cavitjes 8 09/26/20 Presenter | Presentation Title or Meeting Title 17