Scalable quantum information processing with atomic ensembles and flying photons

Journal Article · Thu Oct 15 04:00:00 EDT 2009 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.80.042319· OSTI ID:21316372

Feng, Mei; Yafei, Yu ^[1]; Mang, Feng ^[2]; Zhiming, Zhang ^[1]

---

1. Laboratory of Photonic Information Technology, SIPSE and LQIT, South China Normal University, Guangzhou 510006 (China)
2. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071 (China)

We present a scheme for scalable quantum information processing with atomic ensembles and flying photons. Using the Rydberg blockade, we encode the qubits in the collective atomic states, which could be manipulated fast and easily due to the enhanced interaction in comparison to the single-atom case. We demonstrate that our proposed gating could be applied to generation of two-dimensional cluster states for measurement-based quantum computation. Moreover, the atomic ensembles also function as quantum repeaters useful for long-distance quantum state transfer. We show the possibility of our scheme to work in bad cavity or in weak coupling regime, which could much relax the experimental requirement. The efficient coherent operations on the ensemble qubits enable our scheme to be switchable between quantum computation and quantum communication using atomic ensembles.

• OSTI ID: 21316372
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 4 Vol. 80; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMS
COMMUNICATIONS
COMPARATIVE EVALUATIONS
DISTANCE
FUNCTIONS
INTERACTIONS
OPTICS
PHOTON-ATOM COLLISIONS
PHOTONS
PROCESSING
QUANTUM COMPUTERS
QUBITS
RUBIDIUM
RYDBERG STATES
TWO-DIMENSIONAL CALCULATIONS