Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session E45: Mott Insulators
8:00 AM–11:00 AM,
Tuesday, March 6, 2018
LACC
Room: 505
Sponsoring
Unit:
DCMP
Chair: Wenxin Ding, Kavli Institute on Theoretical Sciences, Beijing
Abstract ID: BAPS.2018.MAR.E45.3
Abstract: E45.00003 : Parity-time symmetry breaking physics of dissipative Mott insulators
8:24 AM–8:36 AM
Presenter:
Himadri Barman
(Department of Theoretical Physics, Tata Inst of Fundamental Res)
Authors:
Vikram Tripathi
(Department of Theoretical Physics, Tata Inst of Fundamental Res)
Alexey Galda
(Materials Science Division, Argonne National Laboratory)
Himadri Barman
(Department of Theoretical Physics, Tata Inst of Fundamental Res)
Valerii Vinokour
(Materials Science Division, Argonne National Laboratory)
We propose a parity-time (PT) symmetric non-Hermitian Hubbard model which captures the effect of dissipation plus drive in such systems and solve it using Bethe ansatz for one dimension and dynamical mean-field theory (DMFT) for higher dimensions. We find universal critical insulator-to-metal phase transition, signaled by closing of spectral gap of the insulating phase near the PT-symmetry breaking point. We determine the critical exponents for such phase transitions. The 1-dimensional phase transition bears strong analogy with the vortex insulator-to-metal transition, with the same critical exponent found in a recent experiment on Nb superconducting islands. If time permits, I shall also discuss our recent results where disorder enters into the scenario.
References :
1. Tripathi, Galda, Barman, and Vinokur, Phys. Rev. B 94, 041104(R) (2016).
( arXiv:1510.08355v1)
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.E45.3
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