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7 papers · 2 filters
Faithful qubit transmission against collective noise without ancillary qubits
Xi-Han Li, Fu-Guo Deng, Hong-Yu Zhou
We present a faithful qubit transmission scheme with linear optics against collective noise, not resorting to ancillary qubits. Its set-up is composed of three unbalanced polarizat…
Controlled Teleportation of an Arbitrary Multi-Qudit State in a General Form with d-Dimensional Greenberger-Horne-Zeilinger States
Xi-Han Li, Fu-Guo Deng, Hong-Yu Zhou
A general scheme for controlled teleportation of an arbitrary multi-qudit state with d-dimensional Greenberger-Horne-Zeilinger (GHZ) states is proposed. For an arbitrary m-qudit st…
Multiparty quantum secret sharing with pure entangled states and decoy photons
Ping Zhou, Xi-Han Li, Yu-Jie Liang +2
We present a scheme for multiparty quantum secret sharing of a private key with pure entangled states and decoy photons. The boss, say Alice uses the decoy photons, which are rando…
Efficient quantum cryptography network without entanglement and quantum memory
Chun-Yan Li, Xi-Han Li, Fu-Guo Deng +3
An efficient quantum cryptography network protocol is proposed with d-dimension polarized photons, without resorting to entanglement and quantum memory. A server on the network, sa…
Secure quantum key distribution network with Bell states and local unitary operations
Chun-Yan Li, Hong-Yu Zhou, Yan Wang +1
We propose a theoretical scheme for secure quantum key distribution network following the ideas in quantum dense coding. In this scheme, the server of the network provides the serv…
Entanglement Entropy: Helicity versus Spin
Song He, Shuxin Shao, Hongbao Zhang
For a massive spin 1/2 field, we present the reduced spin and helicity density matrix, respectively, for the same pure one particle state. Their relation has also been developed. F…