TELEPORTATION OF AN ARBITRARY AND UNKNOWN JOSEPHSON CHARGE-QUBIT ENTANGLED STATE VIA A CLUSTER STATE

2009 ◽  
Vol 07 (01) ◽  
pp. 403-411 ◽  
Author(s):  
BO WU ◽  
DA-CHUANG LI ◽  
HONG DAI
Keyword(s):  
Quantum Channel ◽  
Cluster State ◽  
Bell State ◽  
Entangled State ◽  
Charge Qubit ◽  
Bell State Measurement ◽  
State Measurement ◽  
Successful Probability ◽  
Charge Qubits ◽  
Experimental Technology

An experimentally feasible scheme for teleporting an arbitrary and unknown entangled state is proposed. In this paper, we use a cluster state as the quantum channel, and we do not need any joint Bell-state measurement (BSM). Our scheme is based on Josephson charge qubits, and the successful probability and fidelity of teleportation can both reach unity. Moreover, the current scheme can be realized within the current experimental technology.

Teleportation of an Unknown Three-Particle Entangled State via a Cluster State

2013 ◽  
Vol 734-737 ◽  
pp. 3022-3025 ◽  
Author(s):  
Li Zhi Yu
Keyword(s):  
Quantum Channel ◽  
Cluster State ◽  
Entangled State ◽  
Successful Probability

Two schemes of teleporting an unknown three-particle entangled state from the sender (Alice) to the receiver (Bob) are proposed. In both schemes, a four-particle maximally entangled cluster state and a four-particle non-maximally entangled cluster state are used quantum channel, respectively. It is shown that if the quantum channel is the maximally entangled cluster state, the unknown three-particle entangled state can be teleported perfectly with the successful probability is 1; if the quantum channel is the non-maximally entangled cluster state, the probability of successful teleportation is determined by two smaller superposition coefficients.

SPLITTING QUANTUM INFORMATION WITH FIVE-ATOM ENTANGLED STATE IN CAVITY QED

2010 ◽  
Vol 08 (08) ◽  
pp. 1289-1299 ◽  
Author(s):  
XIAO-JIE YI ◽  
JIAN-MIN WANG ◽  
GUO-QIANG HUANG
Keyword(s):  
Quantum Information ◽  
Cavity Qed ◽  
Thermal Field ◽  
Bell State ◽  
Quantum Information Splitting ◽  
Entangled State ◽  
Bell State Measurement ◽  
State Measurement ◽  
Information Splitting

A realizable scheme is proposed for implementing quantum information splitting with five-atom entangled state in cavity QED, where we explicitly illustrate the procedure and analyze the security against the eavesdropping. The scheme does not involve Bell-state measurement and is insensitive to the cavity and the thermal field.

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.

Realization of an economical phase-covariant telecloning in separate cavities

2012 ◽  
Vol 12 (3&4) ◽  
pp. 334-345
Author(s):  
Bao-Long Fang ◽  
Tao Wu ◽  
Liu Ye
Keyword(s):  
Quantum Information ◽  
Bell State ◽  
Entangled State ◽  
Bell State Measurement ◽  
State Measurement ◽  
Photon Pulse ◽  
Separate Cavities

We present a scheme to realize an economical $1 \to 2$ phase-covariant telecloning in separate cavities. In the scheme, an entangled state between a photon pulse and the tapped atoms will be prepared through cavity-assisted interaction. Next, the Bell state measurement is execute on the photon pulse and a trapped atom or another photon pulse on which the quantum information is encoded. In this way, the system can provide symmetric (asymmetric) economical $1 \to 2$ phase-covariant telecloning.

THE TELEPORTATION OF AN ARBITRARY TWO-ATOM ENTANGLED STATE IN DRIVEN CAVITY QED

2007 ◽  
Vol 05 (03) ◽  
pp. 359-366 ◽  
Author(s):  
CHUAN-JIA SHAN ◽  
ZHONG-XIAO MAN ◽  
YUN-JIE XIA ◽  
TANG-KUN LIU
Keyword(s):  
Cavity Qed ◽  
Thermal Field ◽  
Bell State ◽  
Ghz State ◽  
Entangled State ◽  
Driven Cavity ◽  
Bell State Measurement ◽  
State Measurement ◽  
Cavity Decay ◽  
Probability Of Success

We propose a scheme for the teleportation of an arbitrary two-atom entangled state |ϕ〉12 = a|gg〉12 + b|ge〉12 + c|eg〉12 + d|ee〉12 in driven QED. Two pairs of maximally two-atom entangled state are required as the quantum channel. This scheme does not involve apparent (or direct) Bell-state measurement and is insensitive to the cavity decay and the thermal field. Meanwhile this approach can be used to teleport the unknown multipartite GHZ state. The probability of success in our scheme can reach 1.0.

REMOTE INFORMATION CONCENTRATION BY W STATE

2013 ◽  
Vol 27 (26) ◽  
pp. 1350137 ◽  
Author(s):  
JIA-YIN PENG ◽  
MING-QIANG BAI ◽  
ZHI-WEN MO
Keyword(s):  
Quantum Information ◽  
Quantum Channel ◽  
Bell State ◽  
W State ◽  
Unitary Operation ◽  
Bell State Measurement ◽  
Single Qubit ◽  
State Measurement ◽  
Global Operations ◽  
Peculiar Phenomenon

Employing the six-particle W state as the quantum channel in this paper, we investigate remote information concentration (RIC) which is the reverse process of the 1→5 optimal asymmetric economical phase-covariant telecloning (OAEPCT). To achieve the task, Bell state measurement and unitary operation are needed. It is shown that the quantum information initially distributed in five spatially separated qubits can be remotely and probabilistically concentrated back to a single qubit without performing any global operations. The result shows a peculiar phenomenon that the RIC is not always performed perfectly. It can be achieved with certain probability.

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