Storage and retrieval of continuous-variable polarization-entangled cluster states in atomic ensembles

Journal Article · Mon Aug 15 04:00:00 EDT 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.84.022328· OSTI ID:22068521

Dachuang, Li ^[1]; Chunhua, Yuan; Weiping, Zhang ^[1]; Zhuoliang, Cao ^[2]

---

1. Quantum Institute for Light and Atoms, Department of Physics, East China Normal University, Shanghai 200062 (China)
2. Department of Physics and Electronic Engineering, Hefei Normal University, Hefei 230601 (China)

We present a proposal for storing and retrieving a continuous-variable quadripartite polarization-entangled cluster state, using macroscopic atomic ensembles in a magnetic field. The Larmor precession of the atomic spins leads to a symmetry between the atomic canonical operators. In this scheme, each of the four spatially separated pulses passes twice through the respective ensemble in order to map the polarization-entangled cluster state onto the long-lived atomic ensembles. The stored state can then be retrieved by another four read-out pulses, each crossing the respective ensemble twice. By calculating the variances, we analyzed the fidelities of the storage and retrieval, and our scheme is feasible under realistic experimental conditions.

• OSTI ID: 22068521
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 2 Vol. 84; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
74 ATOMIC AND MOLECULAR PHYSICS
ATOMS
LARMOR PRECESSION
MAGNETIC FIELDS
POLARIZATION
PULSES
QUANTUM ENTANGLEMENT
READOUT SYSTEMS
SPIN
SYMMETRY