This paper presents a scheme for probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel. The sender Alice first teleports the coefficients of the unknown state t...This paper presents a scheme for probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel. The sender Alice first teleports the coefficients of the unknown state to the receiver Bob, and then Bob reconstructs the state with an auxiliary particle and some unitary operations if the teleportation succeeds. This scheme has the advantage of transmitting much less particles for teleporting an arbitrary GHZ-class state than others. Moreover, it discusses the application of this scheme in quantum state sharing.展开更多
We present a scheme for multiparty-controlled teleportation of an arbitrary high-dimensional GHZ-class state with a d-dimensional (N+2)-particle GHZ state following some ideas from the teleportation (Chinese Physics B...We present a scheme for multiparty-controlled teleportation of an arbitrary high-dimensional GHZ-class state with a d-dimensional (N+2)-particle GHZ state following some ideas from the teleportation (Chinese Physics B, 2007, 16: 2867). This scheme has the advantage of transmitting much fewer particles for controlled teleportation of an arbitrary multiparticle GHZ-class state. Moreover,we discuss the application of this scheme by using a nonmaximally entangled state as its quantum channel.展开更多
We investigate the controlled implementation of a non-local CNOT operation using a three-qubit entangled state. Firstly, we show how the non-local CNOT operation can be implemented with unit fidelity and unit probabil...We investigate the controlled implementation of a non-local CNOT operation using a three-qubit entangled state. Firstly, we show how the non-local CNOT operation can be implemented with unit fidelity and unit probability by using a maximally entangled GHZ state as controlled quantum channel. Then, we put forward two schemes for conclusively implementing the non-local operation with unit fidelity by employing a partially entangled pure GHZ state as quantum channel. The feature of these schemes is that a third side is included, who may participate the process of quantum non-local implementation as a supervisor. Furthermore, when the quantum channel is partially entangled,the third one can rectify the state distorted by imperfect quantum channel. In addition to the GHZ class state, the W class state can also be used to implement the same non-local operation probabilistically. The probability of successful implementation using the W class state is always less than that using the GHZ class state.展开更多
We present,two schemes for concentrating unknown nonmaximally entangled Greenberger Horme-Zeilinger(GHZ) or W class states.The first scheme for concentrating the nonmaximally entangled GHZ state is based on linearopti...We present,two schemes for concentrating unknown nonmaximally entangled Greenberger Horme-Zeilinger(GHZ) or W class states.The first scheme for concentrating the nonmaximally entangled GHZ state is based on linearoptical devices.The second scheme for concentrating the W class states can be applied to a wide variety of atomic state.Both of our schemes are not postselection ones and are within the current technologies.展开更多
<Abstract>We propose two physical schemes,which can teleport unknown atomic entangled states from user A (Alice) to user B (Bob) via GHZ class states as quantum channel.The two schemes are both based on cavity Q...<Abstract>We propose two physical schemes,which can teleport unknown atomic entangled states from user A (Alice) to user B (Bob) via GHZ class states as quantum channel.The two schemes are both based on cavity QED techniques. In the two schemes,teleportation and distillation procedures can be realized simultaneously.The second teleportation scheme is more advantageous than the first one.展开更多
W。D ü r 等。证明了经由本地操作和古典通讯(LOCC ) 从任意的 W 班状态的一个拷贝获得一个 GHZ 状态是不可能的[W。D ü r， G。Vidal，和 J.I Cirac， Phys。加快。一 62 (2000 ) 062314 ] 。在我们的纸，更一般的案例小心...W。D ü r 等。证明了经由本地操作和古典通讯(LOCC ) 从任意的 W 班状态的一个拷贝获得一个 GHZ 状态是不可能的[W。D ü r， G。Vidal，和 J.I Cirac， Phys。加快。一 62 (2000 ) 062314 ] 。在我们的纸，更一般的案例小心地被调查。我们首先证明与任意的 W 班状态的二个拷贝的供应，我们能总是构造一个明确的过程与非零可能性提取一个 GHZ 状态。然后基于这结果，为从任意的 W 班状态的 n 拷贝提取 GHZ 状态的一个简单过程被介绍。最后，我们简短讨论应用。展开更多
基金Project supported by the National Natural Science Foundation of China （Grant Nos 10604008 and 10435020） and Beijing Education Committee （Grant No XK100270454）.
文摘This paper presents a scheme for probabilistic teleportation of an arbitrary GHZ-class state with a pure entangled two-particle quantum channel. The sender Alice first teleports the coefficients of the unknown state to the receiver Bob, and then Bob reconstructs the state with an auxiliary particle and some unitary operations if the teleportation succeeds. This scheme has the advantage of transmitting much less particles for teleporting an arbitrary GHZ-class state than others. Moreover, it discusses the application of this scheme in quantum state sharing.
基金supported by the Scientific Research Starting Foundation of Guangxi University for Nationalities (Grant No. 2008QD019)the Guangxi Natural Science Foundation (Grant No. 0991015)
文摘We present a scheme for multiparty-controlled teleportation of an arbitrary high-dimensional GHZ-class state with a d-dimensional (N+2)-particle GHZ state following some ideas from the teleportation (Chinese Physics B, 2007, 16: 2867). This scheme has the advantage of transmitting much fewer particles for controlled teleportation of an arbitrary multiparticle GHZ-class state. Moreover,we discuss the application of this scheme by using a nonmaximally entangled state as its quantum channel.
文摘We investigate the controlled implementation of a non-local CNOT operation using a three-qubit entangled state. Firstly, we show how the non-local CNOT operation can be implemented with unit fidelity and unit probability by using a maximally entangled GHZ state as controlled quantum channel. Then, we put forward two schemes for conclusively implementing the non-local operation with unit fidelity by employing a partially entangled pure GHZ state as quantum channel. The feature of these schemes is that a third side is included, who may participate the process of quantum non-local implementation as a supervisor. Furthermore, when the quantum channel is partially entangled,the third one can rectify the state distorted by imperfect quantum channel. In addition to the GHZ class state, the W class state can also be used to implement the same non-local operation probabilistically. The probability of successful implementation using the W class state is always less than that using the GHZ class state.
基金The project supported by National Natural Science Foundation of Chinathe National Fundamental Research Program under Grant No.2006CB921900
文摘We present,two schemes for concentrating unknown nonmaximally entangled Greenberger Horme-Zeilinger(GHZ) or W class states.The first scheme for concentrating the nonmaximally entangled GHZ state is based on linearoptical devices.The second scheme for concentrating the W class states can be applied to a wide variety of atomic state.Both of our schemes are not postselection ones and are within the current technologies.
文摘<Abstract>We propose two physical schemes,which can teleport unknown atomic entangled states from user A (Alice) to user B (Bob) via GHZ class states as quantum channel.The two schemes are both based on cavity QED techniques. In the two schemes,teleportation and distillation procedures can be realized simultaneously.The second teleportation scheme is more advantageous than the first one.
基金National Natural Science Foundation of China under Grant No.10404039
文摘W。D ü r 等。证明了经由本地操作和古典通讯(LOCC ) 从任意的 W 班状态的一个拷贝获得一个 GHZ 状态是不可能的[W。D ü r， G。Vidal，和 J.I Cirac， Phys。加快。一 62 (2000 ) 062314 ] 。在我们的纸，更一般的案例小心地被调查。我们首先证明与任意的 W 班状态的二个拷贝的供应，我们能总是构造一个明确的过程与非零可能性提取一个 GHZ 状态。然后基于这结果，为从任意的 W 班状态的 n 拷贝提取 GHZ 状态的一个简单过程被介绍。最后，我们简短讨论应用。
