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Quantum matter without quasiparticles: random fermion models,..... by Subir Sachdev

277 views · Published 6 July 2016 · 35:42 · Indexed 20 September 2026

Channel: International Centre for Theoretical Sciences · 2016 · Science & Technology

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DATES
Monday 20 Jun, 2016 - Wednesday 29 Jun, 2016
VENUE
Ramanujan Lecture Hall, ICTS Bangalore
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Understanding strongly interacting quantum many body systems is one of the major frontiers in present day physics. Condensed matter physics provides a wide panoply of systems where strong interaction between constituent particles play a dominant role; some examples of such systems are high temperature superconductors, spin-liquids, fractional quantum Hall systems, and ultracold atoms in the strong-coupling regime. Recent additions to this list include topological insulators/superconductors, transition metal oxides and their heterostructures. These materials have the added feature that they have strong spin-orbit coupling. The interplay of strong interactions and strong spin-orbit coupling is presently a frontier area of research in condensed matter physics.

This program aims to introduce graduate students and post-docs to different aspects of strongly interacting systems focusing on ideas which are recently animating the condensed matter community world-wide. The program will consist of a week-long pedagogical lectures from 20.06.2016 to 26.06.2016 on frontier areas, followed by three days of a discussion meeting from 27.06.2016 to 29.06.2016 on related topics, presenting and discussing the latest situation in these areas.

The school lecturers are :

Subir Sachdev (Harvard University)
Mohit Randeria ( The Ohio State University)
Jainendra Jain ( Penn State University)
Jay D. Sau ( University of Maryland, College Park ) 
Kedar Damle (Tata Institute of Fundamental Research, Mumbai)
Vijay Shenoy (Indian Institute of Science, Bangalore)
Diptiman Sen (Indian Institute of Science, Bangalore)

Table of Contents (powered by https://videoken.com)
0:00:00 INTERNATIONAL
0:00:04 School on Current Frontiers of Condensed Matter Research
0:00:30 Quantum matter without quasiparticles: 1. Ground states disconnected from independent electron states: many-particle entanglement
0:02:14 Local thermal equilibration or
0:04:02 The time over which a many-body quantum system becomes chaotic is given by TL = I/XL,
0:06:04 Local thermal equilibration or phase coherence time, Ty:
0:06:56 Graphene
0:11:47 with a "relativistic" Hamiltonian, hydrodynamic, holographic, and memory function methods yield
0:16:07 Predicted strange metal
0:17:16 J. Crossno et al., Science 351, 1058 (2016)
0:18:56 Strange metal in graphene
0:19:29 TOO
0:27:35 TOO Too
0:30:32 Quantum matter without quasiparticles:
0:31:23 SYK model without quasiparticles To obtain a non-Fermi liquid, we set bij = 0:
0:32:58 Infinite-range (SYK) model without quasiparticles
0:33:02 Infinite-range (SYK) model without quasiparticles Let us write the large N saddle point solutions of as G.
0:33:33 Infinite-range (SYK) model without quasiparticles However the effective action must vanish for SL(2,
0:34:35 Entangled quantum matter without quasiparticles

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