Fusion of atomic W-like states in cavity QED systems

Abstract

It is well-known that maximally entangled GHZ states can achieve perfect teleportation and superdense coding, whereas maximally entangled W states cannot. However, it has been demonstrated that there exists a special class of non-maximally entangled W states, called as \textit{W-like} states, which can overcome this limitation. Therefore, it is of great significance to prepare such W-like states for efficient quantum communication. Here, we propose two kinds of novel and efficient fusion schemes for atomic W-like states based on the large-detuning interactions between several atoms and a single-mode cavity field, with which large-scale atomic $|{\mathcal{W}}_{N+M-1}⟩$ and $|{\mathcal{W}}_{N+M+T-2}⟩$ states can be prepared, respectively, from two small-scale atomic $|{\mathcal{W}}_N⟩$ and $|{\mathcal{W}}_M⟩$ states and three small-scale atomic $|{\mathcal{W}}_N⟩$, $|{\mathcal{W}}_M⟩$ and $|{\mathcal{W}}_T⟩$ states, by detecting the states of one or two of the fused atoms. Particularly, although the fusion process of our scheme involves particle loss, the corresponding success probability is high and fixed, which may induce high fusion efficiency. Furthermore, through the investigation of the resource cost and feasibility analysis, our protocol is simple and feasible under the current experimental conditions. All these suggest that it provides an alternative strategy for preparing large-scale atomic W-like states for perfect teleportation and superdense coding.

arXiv comment8 pages, 4 figures, 1 table

References in corpus (22)

• Quantum Cryptography
• Three qubits can be entangled in two inequivalent ways
• Bell nonlocality
• Measurement-based quantum computation with cluster states
• Secure quantum key distribution with realistic devices
• Experimental One-Way Quantum Computing
• Coherent control of an atomic collision in a cavity
• Perfect Teleportation and Superdense Coding With W-States
• Quantum teleportation via a W state
• Scheme for the preparation of the multi-particle entanglement in cavity QED
• SLOCC classification of n qubits invoking the proportional relationships for spectrums and for standard Jordan normal forms
• Can the states of the W-class be suitable for teleportation
• Enhancing the W State Quantum Network Fusion Process with A Single Fredkin Gate
• Experimental quantum secret sharing based on phase encoding of coherent states
• The states of W-class as shared resources for perfect teleportation and superdense coding
• Entanglement generation in superconducting qubits using holonomic operations
• On preparation of the W-states from atomic ensembles
• Deterministic Local Expansion of W States
• Deterministic generation of large scale atomic W states
• One-photon Solutions to Multiqubit Multimode quantum Rabi model
• Nonlinear Nanoresonators for Bell State Generation
• Photonic multipartite entanglement conversion using nonlocal operations

Cited by in corpus (1)

• The necessary and sufficient condition for perfect teleportation and superdense coding and all the suitable states for teleportation and superdense coding