A scheme for the teleportation of multiqubit quantum information via the control of many agents in a network

We present a new scheme for teleporting multiqubit quantum information from a sender to a distant receiver via the control of many agents in a network. We show that the receiver can successfully restore the original state of each qubit as long as all the agents cooperate. However, it is remarkable that for certain type of teleported states, the receiver cannot gain any amplitude information even if one agent does not collaborate. In addition, our analysis shows that for general input states of each message qubit, the average fidelity for the output states, when even one agent does not take action, is the same as that for the previous proposals.

[1]  E. Knill,et al.  A scheme for efficient quantum computation with linear optics , 2001, Nature.

[2]  V. Buzek,et al.  Quantum secret sharing , 1998, quant-ph/9806063.

[3]  Charles H. Bennett,et al.  Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels. , 1993, Physical review letters.

[4]  Biham,et al.  Quantum cryptographic network based on quantum memories. , 1996, Physical review. A, Atomic, molecular, and optical physics.

[5]  Kimble,et al.  Unconditional quantum teleportation , 1998, Science.

[6]  M. Koashi,et al.  Quantum entanglement for secret sharing and secret splitting , 1999 .

[7]  D. Gottesman.  Theory of quantum secret sharing , 1999, quant-ph/9910067.

[8]  H. Weinfurter,et al.  Experimental quantum teleportation , 1997, Nature.

[9]  Hideki Imai,et al.  Improving quantum secret-sharing schemes , 2001 .

[10]  H. Briegel,et al.  Experimental demonstration of five-photon entanglement and open-destination teleportation , 2004, Nature.

[11]  E. Knill,et al.  Complete quantum teleportation using nuclear magnetic resonance , 1998, Nature.

[12]  L. Hsu.  Quantum secret-sharing protocol based on Grover's algorithm , 2003 .

[13]  M. Bourennane,et al.  Quantum teleportation using three-particle entanglement , 1998 .

[14]  R. Cleve,et al.  HOW TO SHARE A QUANTUM SECRET , 1999, quant-ph/9901025.

[15]  P. Knight,et al.  Multiparticle generalization of entanglement swapping , 1998 .

[16]  S. Bandyopadhyay.  Teleportation and secret sharing with pure entangled states , 2000, quant-ph/0002032.

[17]  G Weihs,et al.  Experimental demonstration of four-photon entanglement and high-fidelity teleportation. , 2001, Physical review letters.

[18]  Farrokh Vatan,et al.  All linear optical quantum memory based on quantum error correction. , 2003, Physical review letters.

[19]  Chui-Ping Yang,et al.  Efficient many-party controlled teleportation of multiqubit quantum information via entanglement , 2004, quant-ph/0402138.

[20]  Paul D. Townsend,et al.  Quantum cryptography on multiuser optical fibre networks , 1997, Nature.