Entanglement and quantum superposition induced by a single photon

Abstract

We predict the occurrence of single-photon-induced entanglement and quantum superposition in a hybrid quantum model, introducing an optomechanical coupling into the Rabi model. Originally, it comes from the photon-dependent quantum property of ground state featured by the proposed hybrid model. It associates with a single-photon-induced quantum phase transition, and is immune to the $A^2$ term of the spin-field interaction. Moreover, the obtained quantum superposition state is actual a squeezed cat state, which can give a significant precision enhancement in quantum metrology. This work offers an approach to manipulate entanglement and quantum superposition with a single photon, which might has potential applications in the engineering of new single-photon quantum devices, and also fundamentally broaden the regime of cavity QED.

7 pages, 5 figures, Published in Physical Review A 97, 033807 (2018). arXiv admin note: text overlap with arXiv:1803.06599

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• Switchable Superradiant Phase Transition with Kerr Magnons
• One-photon Solutions to Multiqubit Multimode quantum Rabi model
• Generation of hybrid maximally entangled states in a one-dimensional quantum walk
• Single-photon-triggered quantum chaos
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• Resilience of the superradiant phase against ${\mathbf{A}}^2$ effects in the quantum Rabi dimer
• Generation of single entangled photon-phonon pairs via an atom-photon-phonon interaction
• Photon-assisted entanglement and squeezing generation and decoherence suppression via a quadratic optomechanical coupling
• Single-photon-triggered spin squeezing with decoherence reduction in optomechanics via phase matching
• Simultaneous ground-state cooling of multiple degenerate mechanical modes through cross-Kerr effect
• All-optical generation of deterministic squeezed Schrödinger-cat states
• Quantum thermalization and thermal entanglement in the open quantum Rabi model
• Detection of light-matter interaction in the weak coupling regime by quantum light
• Superradiant phase transition induced by the indirect Rabi interaction
• Switchable dynamics in the deep-strong-coupling regime
• Phase-controlled robust tripartite quantum entanglement in cavity-magnon optomechanics
• Magnon squeezing near a quantum critical point in a cavity-magnon-qubit system
• Advances in quantum optomechanical control based on cavity cold-atom systems
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• Transferring entangled states of photonic cat-state qubits in circuit QED