Multiatom and resonant interaction scheme for quantum state transfer and logical gates between two remote cavities via an optical fiber

Abstract

A system consisting of two single-mode cavities spatially separated and connected by an optical fiber and multiple two-level atoms trapped in the cavities is considered. If the atoms resonantly and collectively interact with the local cavity fields but there is no direct interaction between the atoms, we show that an ideal quantum state transfer and highly reliable quantum swap, entangling, and controlled-Z gates can be deterministically realized between the distant cavities. We find that the operation of state transfer and swap, entangling, and controlled-Z gates can be greatly speeded up as number of the atoms in the cavities increases. We also notice that the effects of spontaneous emission of atoms and photon leakage out of cavity on the quantum processes can also be greatly diminished in the multiatom case.

24 pages, 8 figures; Corrected typos in fig6(b),(c) and references; Adding disscussion on experimental feasibility in the last section. Accepted for PRA

References in corpus (3)

• Distributed quantum computation via optical fibres
• Robust creation of entanglement between ions in spatially separate cavities
• Normal-mode spectroscopy of a single bound atom-cavity system

Cited by in corpus (7)

• Atom detection and photon production in a scalable, open, optical microcavity
• Entangling two atoms in spatially separated cavities through both photon emission and absorption processes
• Implementation of holonomic quantum computation through engineering and manipulating environment
• High-fidelity atomic-state teleportation protocol with non-maximally-entangled states
• Non-Markovian decoherence dynamics of entangled coherent states
• Remote generation of entanglement for individual atoms via optical fibers
• Non-local dynamics of Bell states in separate cavities