Unconventional mechanism of virtual-state population through dissipation

Abstract

Virtual states are a central concept in quantum mechanics. By definition, the probability of finding a quantum system in a virtual state should be vanishingly small at all times. In contrast to this notion, we report a phenomenon occurring in open quantum systems by which virtual states can acquire a sizable population in the long time limit, even if they are not directly coupled to any dissipative channel. This means that the situation where the virtual state remains unpopulated can be metastable. We describe this effect by introducing a two-step adiabiatic elimination method, that we termed hierarchical adiabatic elimination, which allows one to obtain analytical expressions of the timescale of metastability in general open quantum systems. We show how these results can be relevant for practical questions such as the generation of stable and metastable entangled states in dissipative systems of interacting qubits.

References in corpus (35)

• Quantum entanglement
• Entanglement of Formation of an Arbitrary State of Two Qubits
• The Quantum Jump Approach to Dissipative Dynamics in Quantum Optics
• Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms
• Entanglement of two qubits mediated by one-dimensional plasmonic waveguides
• Proposed realization of the Dicke-model quantum phase transition in an optical cavity QED system
• Cavity Loss Induced Generation of Entangled Atoms
• Dissipative production of a maximally entangled steady state
• Dissipative preparation of entanglement in optical cavities
• Dissipative Phase Transition in Central Spin Systems
• Quantum Optics of Chiral Spin Networks
• Photon-mediated interactions between quantum emitters in a diamond nanocavity
• Effective operator formalism for open quantum systems
• A simple model of quantum trajectories
• Towards a theory of metastability in open quantum dynamics
• Quantum Spin Dimers from Chiral Dissipation in Cold-Atom Chains
• Adiabatic Elimination in a Lambda System
• A Single Photon Can Simultaneously Excite Two or More Atoms
• Multiphoton Quantum Rabi Oscillations in Ultrastrong Cavity QED
• Spontaneous two photon emission from a single quantum dot
• Time Averaged Quantum Dynamics and the Validity of the Effective Hamiltonian Model
• Two-photon lasing by a single quantum dot in a high-Q microcavity
• Mimicking a Squeezed Bath Interaction: Quantum Reservoir Engineering with Atoms
• Quantum Nonlinear Optics without Photons
• Atom-only descriptions of the driven-dissipative Dicke model
• Cooling atoms into entangled states
• Cooling atom-cavity systems into entangled states
• Theory of classical metastability in open quantum systems
• Generalized Adiabatic Theorem and Strong-Coupling Limits
• Adiabatic Elimination and Sub-space Evolution of Open Quantum Systems
• Adiabatic Elimination in Compound Quantum Systems with Feedback
• Generalized transitionless quantum driving for open quantum systems
• Two-photon resonance fluorescence of two interacting non-identical quantum emitters
• Eternal Adiabaticity
• Protecting subspaces by acting on the outside