Effect of Quantum Noise on Teleportation of an Arbitrary Single-Qubit State via a Triparticle W State

In this paper, an asymmetric bidirectional controlled quantum teleportation via a six-qubit partially entangled state is given, in which Alice wants to transmit a two-qubit entangled state to Bob and Bob wants to transmit a single-qubit state to Alice on the same time. Although the six-qubit state as quantum channel is partially entangled, the teleportation is implemented deterministically. Furthermore, only Bell-state measurements, single-qubit measurements and some unitary operations are needed in the scheme.

Download Full-text

TRIPARTITION OF ARBITRARY SINGLE-QUBIT QUANTUM INFORMATION BY USING ASYMMETRIC FOUR-QUBIT W STATE

International Journal of Quantum Information ◽

10.1142/s0219749909004943 ◽

2009 ◽

Vol 07 (01) ◽

pp. 349-355 ◽

Cited By ~ 13

Author(s):

YI-MIN LIU ◽

XIAO-FENG YIN ◽

WEN ZHANG ◽

ZHAN-JUN ZHANG

Keyword(s):

Quantum Information ◽

The Other ◽

W State ◽

Unitary Operation ◽

Quantum Channels ◽

Single Qubit

In this paper we propose a four-party scheme for a sender to achieve the tripartition of his/her arbitrary single-qubit quantum information among three recipients via an asymmetric four-qubit W state as quantum channels. In the scheme, if and only if, the three recipients cooperate together, they can perfectly retrieve the sender's quantum information by performing first two 2-qubit collective unitary operations and then a single-qubit unitary operation. The scheme is symmetric with respect to the reconstruction for any recipient can conclusively recover the quantum information with the other two's helps.

Download Full-text

SYMMETRIC AND PROBABILISTIC MULTIPARTY REMOTE STATE PREPARATION VIA THE POSITIVE-OPERATOR-VALUED MEASURE

International Journal of Quantum Information ◽

10.1142/s0219749909005651 ◽

2009 ◽

Vol 07 (05) ◽

pp. 991-999 ◽

Cited By ~ 12

Author(s):

YI-MIN LIU ◽

ZHANG-YIN WANG ◽

XIAN-SONG LIU ◽

ZHAN-JUN ZHANG

Keyword(s):

Positive Operator ◽

Qubit State ◽

Remote State Preparation ◽

The Other ◽

Projective Measurement ◽

State Preparation ◽

Single Qubit ◽

Prepared State ◽

Positive Operator Valued Measure

We present a tripartite scheme for a preparer to remotely prepare an arbitrary single-qubit state in either distant ministrant's place by using a GHZ-type state. After the preparer's single-qubit state projective measurement, by performing a proper positive operator-valued measure, one ministrant can construct the preparer's state in a probabilistic manner with the other ministrant's assistance. Furthermore, we show that the remote state preparation can be achieved with a higher probability provided that the prepared state belongs to two special ensembles. Finally, we sketch the generalization of the tripartite scheme to a multiparty case.

Download Full-text