Physics

Observation of quantum depletion in a non-equilibrium exciton-polariton condensate

M. Pieczarka, E. Estrecho, et al.

Discover groundbreaking insights into superfluidity and quantum depletion, as researchers Maciej Pieczarka, Eliezer Estrecho, Maryam Boozarjmehr, and their team investigate high-density exciton-polariton condensates, revealing the intricate dynamics of equilibrium and non-equilibrium Bose-Einstein condensates.

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Index

Abstract

Superfluidity, closely related to Bose-Einstein condensation (BEC), exhibits quantum depletion even at zero temperature. This study observes quantum depletion in a high-density exciton-polariton condensate by analyzing the spectral branch of elementary excitations. Results show that quantum depletion can closely follow or deviate from equilibrium Bogoliubov theory depending on the exciton fraction, revealing beyond mean-field effects and highlighting the complex relationship between equilibrium and non-equilibrium BECs.

Publisher

Nature Communications

Published On

Jan 22, 2020

Authors

Maciej Pieczarka, Eliezer Estrecho, Maryam Boozarjmehr, Olivier Bleu, Mark Steger, Kenneth West, Loren N. Pfeiffer, David W. Snoke, Jesper Levinsen, Meera M. Parish, Andrew G. Truscott, Elena A. Ostrovskaya

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