Many-Body Localization for Randomly Interacting Bosons

• Authors: P. Sierant , D. Delande , J. Zakrzewski
• Languages of publication: EN

Abstracts

EN

We study many-body localization in a one dimensional optical lattice filled with bosons. The interaction between bosons is assumed to be random, which can be realized for atoms close to a microchip exposed to a spatially fluctuating magnetic field. Close to a Feshbach resonance, such controlled fluctuations can be transfered to the interaction strength. We show that the system reveals an inverted mobility edge, with mobile particles at the lower edge of the spectrum. A statistical analysis of level spacings allows us to characterize the transition between localized and excited states. The existence of the mobility edge is confirmed in large systems, by time dependent numerical simulations using tDMRG. A simple analytical model predicts the long time behavior of the system.

Keywords

EN

many-body localization; Bose-Hubbard model; disorder in many-body physics; mobility edge

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2017
• Volume: 132
• Issue: 6
• Pages: 1707-1712

Dates

published

2017-12

Contributors

author

P. Sierant

• Instytut Fizyki imienia Mariana Smoluchowskiego, Uniwersytet Jagielloński, Profesora Stanisława Łojasiewicza 11, PL-30348 Kraków, Poland

author

D. Delande

• Laboratoire Kastler Brossel, UPMC-Sorbonne Universités, CNRS, ENS-PSL Research University, Collège de France, 4 Place Jussieu, 75005 Paris, France

author

J. Zakrzewski

• Instytut Fizyki imienia Mariana Smoluchowskiego, Uniwersytet Jagielloński, Profesora Stanisława Łojasiewicza 11, PL-30348 Kraków, Poland
• Mark Kac Complex Systems Research Center, Uniwersytet Jagielloński, Kraków, Poland

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Identifiers

DOI

10.12693/APhysPolA.132.1707