Complete hyperentangled-Bell-state analysis for quantum communication

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.032318· OSTI ID:21448656

Yubo, Sheng ^[1]; Fuguo, Deng ^[2]; Guilu, Long ^[1]

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1. Department of Physics, Tsinghua University, Beijing 100084 (China)
2. Department of Physics, Beijing Normal University, Beijing 100875 (China)

It is impossible to unambiguously distinguish the four Bell states in polarization, resorting to linear optical elements only. Recently, the hyperentangled Bell state, the simultaneous entanglement in more than one degree of freedom, has been used to assist in the complete Bell-state analysis of the four Bell states. However, if the additional degree of freedom is qubitlike, one can only distinguish 7 from the group of 16 states. Here we present a way to distinguish the hyperentangled Bell states completely with the help of cross-Kerr nonlinearity. Also, we discuss its application in the quantum teleportation of a particle in an unknown state in two different degrees of freedom and in the entanglement swapping of hyperentangled states. These applications will increase the channel capacity of long-distance quantum communication.

• OSTI ID: 21448656
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 3 Vol. 82; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BELL THEOREM
CAPACITY
COMMUNICATIONS
DATA TRANSMISSION
DEGREES OF FREEDOM
DISTANCE
MECHANICS
NONLINEAR PROBLEMS
POLARIZATION
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUANTUM STATES
QUANTUM TELEPORTATION