期刊
PHYSICAL REVIEW LETTERS
卷 128, 期 4, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.128.040603
关键词
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资金
- Wissenschaftler Ruckkehrprogramm GSO/CZS of the Carl-Zeiss-Stiftung
- German Scholars Organization e.V.
- Leverhulme Trust [RPG-2018-181]
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/R04421X/1]
- Deutsche Forschungsgemeinschaft through SPP 1929 (GiRyd) [428276754, 435696605]
We introduce the concept of dark space phase transition, which may occur in open many-body quantum systems where irreversible decay, interactions, and quantum interference compete. Our study is based on a quantum many-body model and reveals a nonequilibrium phase transition within this dark space, featuring phenomena that cannot be encountered in classical systems. It has potential implications for technological applications, such as the collective encoding of quantum information.
We introduce the concept of dark space phase transition, which may occur in open many-body quantum systems where irreversible decay, interactions, and quantum interference compete. Our study is based on a quantum many-body model that is inspired by classical nonequilibrium processes which feature phase transitions into an absorbing state, such as epidemic spreading. The possibility for different dynamical paths to interfere quantum mechanically results in collective dynamical behavior without classical counterpart. We identify two competing dark states, a trivial one corresponding to a classical absorbing state and an emergent one which is quantum coherent. We establish a nonequilibrium phase transition within this dark space that features a phenomenology which cannot be encountered in classical systems. Such emergent two-dimensional dark space may find technological applications, e.g., for the collective encoding of a quantum information.
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