ArticleScientific reports2020
Quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled-oscillator system.
Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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3 citing papers in PubMed.
- Measurement of the Temperature Using the Tomographic Representation of Thermal States for Quadratic Hamiltonians.Entropy (Basel, Switzerland) · 2021Article
- Universal separability criterion for arbitrary density matrices from causal properties of separable and entangled quantum states.Scientific reports · 2021Article
- Dynamical Invariant and Exact Mechanical Analyses for the Caldirola-Kanai Model of Dissipative Three Coupled Oscillators.Entropy (Basel, Switzerland) · 2021Article
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5 authors.
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Abstract
We study the effect of quantum entanglement maintained by virtual excitations in an ultrastrongly-coupled harmonic-oscillator system. Here, the quantum entanglement is caused by the counterrotating interaction terms and hence it is maintained by the virtual excitations. We obtain the analytical expression for the ground state of the system and analyze the relationship between the average excitation numbers and the ground-state entanglement. We also study the entanglement dynamics between the two oscillators in both the closed- and open-system cases. In the latter case, the quantum master equation is microscopically derived in the normal-mode representation of the coupled-oscillator system. This work will open a route to the study of quantum information processing and quantum physics based on virtual excitations.
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