Author
Fang Ming
Bio: Fang Ming is an academic researcher from Anhui University. The author has contributed to research in topics: Cloning (programming) & Qubit. The author has an hindex of 2, co-authored 2 publications receiving 21 citations.
Topics: Cloning (programming), Qubit, Quantum cloning, Clone (algebra)
Papers
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TL;DR: In this paper, the authors further generalize Zhan's protocols such that an arbitrary unknown two-qubit entangled state can be treated, and propose two assisted quantum cloning protocols of a special class of unknown 2-qubits entangled states.
Abstract: Based on A.K. Pati's original idea [Phys. Rev. A 61 (2000) 022308] on single-qubit-state-assisted clone, very recently Zhan has proposed two assisted quantum cloning protocols of a special class of unknown two-qubit entangled states [Phys. Lett. A 336 (2005) 317]. In this paper we further generalize Zhan's protocols such that an arbitrary unknown two-qubit entangled state can be treated.
12 citations
TL;DR: A probabilistic teleportation scheme for atomic state via cavity QED [Phys. Rev. A 70 (2004) 054303] is revisited and accordingly some improvements are made.
Abstract: A probabilistic teleportation scheme for atomic state via cavity QED [Phys. Rev. A 70 (2004) 054303] is revisited and accordingly some improvements are made.
9 citations
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TL;DR: A comprehensive review of quantum cloning can be found in this article, where the authors give a complete description of those important developments about quantum cloning and some related topics, and in particular, they present some detailed formulations so that further study can be taken based on those results.
104 citations
TL;DR: Two semi-quantum direct communication protocols based on Bell states are proposed that can resistant to several well-known attacks and their qubit efficency is higher than some current protocols.
Abstract: In this paper, we proposed two semi-quantum direct communication protocols based on Bell states. By pre-sharing two secret keys between two communicants, Alice with the advanced quantum ability can transmit secret messages to the classical Bob who can only perform the limited classical operations. At the same time, both sides of the communication can comfirm the legitimacy of each other’s identity. Security and qubit efficency analysis have been given. The analysis results show that the two protocols can resistant to several well-known attacks and their qubit efficency is higher than some current protocols.
24 citations
TL;DR: In this article, the properties of quantum Fisher information in a general superposition of a 3-qubit GHZ state and two W states were investigated, and the mean spin direction, the length of mean spin and quantum fisher information were determined by the coefficients of superposition and the relative phase between the GHZ states and the W states.
Abstract: We investigate the properties of quantum Fisher information in a general superposition of a 3-qubit GHZ state and two W states. Numerical calculation for quantum Fisher information of the 3-qubit state is given. It is shown that the mean spin direction, the length of mean spin and quantum Fisher information are determined by the coefficients of superposition and the relative phase between the GHZ state and the W states.
16 citations
TL;DR: It is shown that for some special ensembles of the three-qubit state, the assisted cloning scheme can be achieved exactly and deterministically.
Abstract: We present a scheme for perfect cloning or orthogonal complementing an unknown arbitrary three-qubit state with assistance. This cloning scheme is divided into two stages. In the first stage, the initial state can be teleported from a sender to a receiver probabilistically via three partially entangled states. In the second stage, the exact copying and orthogonal complementing of the three-qubit state can be created with unity fidelity in a probabilistic manner with the state preparer performing an appropriate tri-particle projective measurement. It is shown that for some special ensembles of the three-qubit state our assisted cloning scheme can be achieved exactly and deterministically.
10 citations
TL;DR: In this article, it was pointed out that the non-cloning theorem in quantum mechanics also holds for unknown state in linear classical physics and that perfect measurement in classical physics enables the copying of a classical state.
Abstract: It is pointed out that the noncloning theorem in quantum mechanics also holds for unknown state in linear classical physics. The apparent capability of copying of a classical state is essentially the capability of perfect measurement in classical physics. The difference in copying between quantum and classical physics is the difference in measurement between the two theories. A classical copying process is the combined action of measurement of an unknown state and the preparation of this state onto another system. Hence perfect measurability in classical physics enables the copying of a classical state.
10 citations