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Operator growth in open quantum systems: lessons from the dissipative SYK [PDF]
Journal of High Energy Physics, 2022 We study the operator growth in open quantum systems with dephasing dissipation terms, extending the Krylov complexity formalism of [ 1 ]. Our results are based on the study of the dissipative q -body Sachdev-Ye-Kitaev (SYK_ q ) model, governed by the ...
Budhaditya Bhattacharjee +3 more
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Defining Stable Phases of Open Quantum Systems [PDF]
Physical Review X, 2023 The steady states of dynamical processes can exhibit stable nontrivial phases, which can also serve as fault-tolerant classical or quantum memories. For Markovian quantum (classical) dynamics, these steady states are extremal eigenvectors of the non ...
Tibor Rakovszky +2 more
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QuantumCumulants.jl: A Julia framework for generalized mean-field equations in open quantum systems [PDF]
Quantum, 2021 A full quantum mechanical treatment of open quantum systems via a Master equation is often limited by the size of the underlying Hilbert space. As an alternative, the dynamics can also be formulated in terms of systems of coupled differential equations ...
D. Plankensteiner +2 more
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Exponentially Accelerated Approach to Stationarity in Markovian Open Quantum Systems through the Mpemba Effect. [PDF]
Physical Review Letters, 2021 Ergodicity breaking and slow relaxation are intriguing aspects of nonequilibrium dynamics both in classical and quantum settings. These phenomena are typically associated with phase transitions, e.g., the emergence of metastable regimes near a first ...
F. Carollo, A. Lasanta, I. Lesanovsky
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Using the Environment to Understand non-Markovian Open Quantum Systems [PDF]
Quantum, 2021 Tracing out the environmental degrees of freedom is a necessary procedure when simulating open quantum systems. While being an essential step in deriving a tractable master equation it represents a loss of information. In situations where there is strong
Dominic Gribben +4 more
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Operator Growth in Open Quantum Systems. [PDF]
Physical Review Letters, 2022 The spreading of quantum information in closed systems, often termed scrambling, is a hallmark of many-body quantum dynamics. In open systems, scrambling competes with noise, errors, and decoherence.
T. Schuster, N. Yao
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Hamiltonian open quantum system toolkit
Communications Physics, 2022 In quantum computing, simulating continuously evolving open quantum systems is key to describe dynamical processes on noisy quantum devices. Here, the authors present an open-source software package “Hamiltonian Open Quantum System Toolkit” (HOQST) for ...
Huo Chen, Daniel A. Lidar
doaj +1 more source
Time crystallinity in open quantum systems [PDF]
Quantum, 2020 Time crystals are genuinely non-equilibrium quantum phases of matter that break time-translational symmetry. While in non-equilibrium closed systems time crystals have been experimentally realized, it remains an open question whether or not such a phase ...
Andreu Riera-Campeny +2 more
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Simulation of open quantum systems by automated compression of arbitrary environments [PDF]
Nature Physics, 2021 Studies of the dynamics of open quantum systems are limited by the large Hilbert space of typical environments, which is too large to be treated exactly.
M. Cygorek +6 more
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Effective-Hamiltonian Theory of Open Quantum Systems at Strong Coupling [PDF]
PRX Quantum, 2022 We present the reaction-coordinate polaron-transform (RCPT) framework for generating effective Hamiltonian models to treat nonequilibrium open quantum systems at strong coupling with their surroundings.
Nicholas Anto-Sztrikacs +2 more
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