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6 papers · 1 filter
Anomalous waiting-time distributions in postselection-free quantum many-body dynamics under continuous monitoring
Kazuki Yamamoto, Ryusuke Hamazaki
We investigate waiting-time distributions (WTDs) of quantum jumps in continuously monitored quantum many-body systems, whose unconditional dynamics lead to the trivial infinite-tem…
Complex nonlinear sigma model
Kazuki Yamamoto, Kohei Kawabata
Motivated by the recent interest in the criticality of open quantum many-body systems, we study nonlinear sigma models with complexified couplings as a general framework for nonuni…
Time Glasses: Symmetry Broken Chaotic Phase with a Finite Gap
Taiki Haga
We introduce the time glass, a non-periodic analogue of the discrete time crystal that arises in periodically driven dissipative quantum many-body systems. This phase is defined by…
Energy-Efficient Pseudo-Ratchet for Brownian Computers through One-Dimensional Quantum Brownian Motion
Sho Nakade, Ferdinand Peper, Kazuki Kanki +1
Brownian computers utilize thermal fluctuations as a resource for computation and hold promise for achieving ultra-low-energy computations. However, the lack of a statistical direc…
Measurement-Induced Crossover of Quantum Jump Statistics in Postselection-Free Many-Body Dynamics
Kazuki Yamamoto, Ryusuke Hamazaki
We reveal a nontrivial crossover of subsystem fluctuations of quantum jumps in continuously monitored many-body systems, which have a trivial maximally mixed state as a steady-stat…
Nonequilibrium Steady States in the Weakly-Coupled XXZ Model
Shimpei Senda, Tatsuro Sunami, Yuto Matsumoto +1
We study nonequilibrium steady states (NESSs) in the weakly-coupled XXZ model in contact with two heat baths at different temperatures. We show that the density matrix can be repre…