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Title: Observation of the Mott insulator to superfluid crossover of a driven-dissipative Bose-Hubbard system
Authors: Tomita, Takafumi
Nakajima, Shuta  kyouindb  KAKEN_id
Danshita, Ippei
Takasu, Yosuke  kyouindb  KAKEN_id  orcid (unconfirmed)
Takahashi, Yoshiro  kyouindb  KAKEN_id
Author's alias: 富田, 隆文
中島, 秀太
段下, 一平
高須, 洋介
高橋, 義朗
Issue Date: 22-Dec-2017
Publisher: American Association for the Advancement of Science (AAAS)
Journal title: Science Advances
Volume: 3
Issue: 12
Thesis number: e1701513
Abstract: Dissipation is ubiquitous in nature and plays a crucial role in quantum systems such as causing decoherence of quantum states. Recently, much attention has been paid to an intriguing possibility of dissipation as an efficient tool for the preparation and manipulation of quantum states. We report the realization of successful demonstration of a novel role of dissipation in a quantum phase transition using cold atoms. We realize an engineered dissipative Bose-Hubbard system by introducing a controllable strength of two-body inelastic collision via photoassociation for ultracold bosons in a three-dimensional optical lattice. In the dynamics subjected to a slow ramp-down of the optical lattice, we find that strong on-site dissipation favors the Mott insulating state: The melting of the Mott insulator is delayed, and the growth of the phase coherence is suppressed. The controllability of the dissipation is highlighted by quenching the dissipation, providing a novel method for investigating a quantum many-body state and its nonequilibrium dynamics.
Description: 見られていると絶縁体が安定化する --観測による量子多体状態の制御技術を確立--. 京都大学プレスリリース. 2017-12-25.
Rights: Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
DOI(Published Version): 10.1126/sciadv.1701513
PubMed ID: 29291246
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