Entangling a series of trapped ions by moving cavity bus

Abstract

Entangling multiple qubits is one of the central tasks for quantum information processings. Here, we propose an approach to entangle a number of cold ions (individually trapped in a string of microtraps) by a moved cavity. The cavity is pushed to include the ions one by one with an uniform velocity, and thus the information stored in former ions could be transferred to the latter ones by such a moving cavity bus. Since the positions of the trapped ions are precisely located, the strengths and durations of the ion-cavity interactions can be exactly controlled. As a consequence, by properly setting the relevant parameters typical multi-ion entangled states, e.g., $W$ state for 10 ions, could be deterministically generated. The feasibility of the proposal is also discussed.

arXiv comment8 pages, 2 figures, 1 table

References in corpus (9)

• Three qubits can be entangled in two inequivalent ways
• Scalable multi-particle entanglement of trapped ions
• Multi-particle entanglement of hot trapped ions
• Experimental Demonstration of Five-photon Entanglement and Open-destination Teleportation
• A microfabricated surface-electrode ion trap for scalable quantum information processing
• Sequential generation of entangled multi-qubit states
• Coupling a single atomic quantum bit to a high finesse optical cavity
• Multiparty Quantum Communication Complexity
• Quantum computation with two-level trapped cold ions beyond Lamb-Dicke limit