SPATIAL BELL STATE MEASUREMENT OF TWO PARTICLES

2005 ◽  
Vol 03 (01) ◽  
pp. 87-92 ◽  
Author(s):  
O. AKHAVAN ◽  
A. T. REZAKHANI ◽  
M. GOLSHANI
Keyword(s):  
Hilbert Space ◽  
Information Gain ◽  
Bell State ◽  
Quantum Channels ◽  
Cnot Gate ◽  
Logarithmic Factor ◽  
Bell State Measurement ◽  
Classical Information ◽  
State Measurement ◽  
Basic Position

Using spatial entanglement of two particles the rate of classical information gain has been increased by a logarithmic factor depending on the dimension of Hilbert space. To study Bell state measurement (BSM) of the two particles, at first, we have defined corresponding Bell bases in a typically general form. Then, the basic position gates are theoretically designed by side quantum channels and the usual CNOT gate. All the processes required in the BSM can be established based upon the introduced local and conditional basic gates.

SECRET SHARING OF N-ATOM ENTANGLED STATE IN CAVITY QED

2007 ◽  
Vol 18 (03) ◽  
pp. 343-349 ◽  
Author(s):  
ZHONG-XIAO MAN ◽  
YUN-JIE XIA ◽  
ZHAN-JUN ZHANG
Keyword(s):  
Secret Sharing ◽  
Cavity Qed ◽  
Thermal Field ◽  
Bell State ◽  
Entangled State ◽  
Quantum Channels ◽  
Driven Cavity ◽  
Bell State Measurement ◽  
State Measurement ◽  
Cavity Decay

We propose a scheme to secret sharing of an unknown N-atom entangled state in driven cavity QED. The scheme needs only atomic Bell states as the quantum channels and joint Bell-state measurement is unnecessary. In addition, the scheme is insensitive to the cavity decay and the thermal field.

QUANTUM AUTHENTICATION USING ENTANGLED STATES

2004 ◽  
Vol 15 (04) ◽  
pp. 609-617 ◽  
Author(s):  
XIAOYU LI ◽  
HOWARD BARNUM
Keyword(s):  
Bell State ◽  
Authentication Scheme ◽  
Entangled States ◽  
Bell State Measurement ◽  
Epr Pairs ◽  
State Measurement ◽  
Quantum Authentication ◽  
Einstein Podolsky Rosen

A quantum authentication scheme is presented in this paper. Two parties share Einstein-Podolsky-Rosen(EPR) pairs previously as the identification token. They create auxiliary EPR pairs to interact with the identification token. Then the authentication is accomplished by a complete Bell state measurement. This scheme is proved to be secure. If no errors and eavesdroppers exist in the transmission, the identification token is unchanged after the authentication. So it can be reused.

Single-photon Bell state measurement based on a quantum random walk

2019 ◽  
Vol 100 (4) ◽  
Author(s):  
Xiao-Xiao Chen ◽  
Jia-Zhi Yang ◽  
Xu-Dan Chai ◽  
An-Ning Zhang
Keyword(s):  
Random Walk ◽  
Single Photon ◽  
Bell State ◽  
Quantum Random Walk ◽  
Bell State Measurement ◽  
State Measurement
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