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4 papers
Non-Gaussian Phase Transition and Cascade of Instabilities in the Dissipative Quantum Rabi Model
Mingyu Kang, Yikang Zhang, Kenneth R. Brown +1
The open quantum Rabi model describes a two-level system coupled to a harmonic oscillator. A Gaussian phase transition for the nonequilibrium steady states has been predicted when…
Conditions for Unitarity in Timeless Quantum Theory
Simone Rijavec
Quantum timeless approaches solve the problem of time by recovering the usual unitary evolution of quantum theory relative to a clock in a stationary quantum Universe. For some Ham…
Driven-Dissipative Bose-Einstein Condensation and the Upper Critical Dimension
Yikang Zhang, Thomas Barthel
Driving and dissipation can stabilize Bose-Einstein condensates. Using Keldysh field theory, we analyze this phenomenon for Markovian systems that can comprise on-site two-particle…
Criteria for Davies Irreducibility of Markovian Quantum Dynamics
Yikang Zhang, Thomas Barthel
The dynamics of Markovian open quantum systems are described by Lindblad master equations, generating a quantum dynamical semigroup. An important concept for such systems is (Davie…