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Impact of Dissipation on Universal Fluctuation Dynamics in Open Quantum Systems
Kazuya Fujimoto1, Ryusuke Hamazaki2, Yuki Kawaguchi3
1Department of Physics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan.
Physical Review Letters
|September 26, 2022
Summary
Dissipation drastically alters quantum surface growth dynamics. Surface-roughness dynamics in 1D free fermions and bosons shift universality classes due to dephasing and incoherent hopping, changing from ballistic to Edwards-Wilkinson scaling.
Area of Science:
- Quantum physics
- Surface growth dynamics
- Condensed matter theory
Background:
- Recent studies explore universal dynamics in isolated quantum systems related to surface growth.
- Understanding the impact of dissipation on these dynamics is crucial.
Purpose of the Study:
- To theoretically elucidate how dissipation alters universal particle-number-fluctuation dynamics in surface-roughness growth.
- To investigate the effect of dephasing and incoherent hopping on universality classes.
Main Methods:
- Theoretical analysis using renormalization-group techniques.
- Numerical simulations of one-dimensional free fermions and bosons.
- Derivation of diffusion equations from Lindblad equations.
Main Results:
- Dissipation drastically changes universality classes of surface-roughness dynamics.
- Dephasing transitions dynamics from ballistic to Edwards-Wilkinson scaling with an unconventional function.
- Symmetric incoherent hopping induces similar universality class changes.
Conclusions:
- Dissipation fundamentally alters quantum surface growth universality.
- The findings provide analytical and numerical explanations for these dramatic shifts.
- This work deepens the understanding of open quantum systems and surface growth phenomena.
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