Impact of Dissipation on Universal Fluctuation Dynamics in Open Quantum Systems
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arXiv
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| Format: | Preprint |
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2022
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| _version_ | 1866909147101921280 |
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| author | Fujimoto, Kazuya Hamazaki, Ryusuke Kawaguchi, Yuki |
| author_facet | Fujimoto, Kazuya Hamazaki, Ryusuke Kawaguchi, Yuki |
| contents | Recent experimental and theoretical works have uncovered nontrivial quantum dynamics due to external dissipation. Using an exact numerical method and a renormalization-group-based analytical technique, we theoretically elucidate that dissipation drastically alters universal particle-number-fluctuation dynamics related to surface-roughness growth in non-interacting fermions and bosons. In a system under dephasing that causes loss of spatial coherence, we find that a universality class of surface-roughness dynamics changes from the ballistic class to a class with the Edwards-Wilkinson scaling exponents and an unconventional scaling function. On the other hand, in a system under dissipation with in- and out-flow of particles that breaks particle-number conservation, the universal dynamics is lost. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2202_02176 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Impact of Dissipation on Universal Fluctuation Dynamics in Open Quantum Systems Fujimoto, Kazuya Hamazaki, Ryusuke Kawaguchi, Yuki Quantum Physics Quantum Gases Statistical Mechanics Recent experimental and theoretical works have uncovered nontrivial quantum dynamics due to external dissipation. Using an exact numerical method and a renormalization-group-based analytical technique, we theoretically elucidate that dissipation drastically alters universal particle-number-fluctuation dynamics related to surface-roughness growth in non-interacting fermions and bosons. In a system under dephasing that causes loss of spatial coherence, we find that a universality class of surface-roughness dynamics changes from the ballistic class to a class with the Edwards-Wilkinson scaling exponents and an unconventional scaling function. On the other hand, in a system under dissipation with in- and out-flow of particles that breaks particle-number conservation, the universal dynamics is lost. |
| title | Impact of Dissipation on Universal Fluctuation Dynamics in Open Quantum Systems |
| topic | Quantum Physics Quantum Gases Statistical Mechanics |
| url | https://arxiv.org/abs/2202.02176 |