QUANTUM STATE SPLITTING WITH YEO–CHUA GENUINE ENTANGLED STATE

2010 ◽  
Vol 08 (06) ◽  
pp. 991-1000 ◽  
Author(s):  
YI-MIN LIU ◽  
WEN ZHANG ◽  
XUE-QIN ZUO ◽  
ZHAN-JUN ZHANG
Keyword(s):  
Quantum State ◽  
Pure State ◽  
Bell State ◽  
Entangled State ◽  
Scheme Design ◽  
Single Qubit ◽  
State Splitting ◽  
Intrinsic Efficiency ◽  
Bell State Measurements ◽  
Quantum State Splitting

Utilizing the four-qubit genuine entangled state presented by Yeo and Chua [Phys. Rev. Lett.96 (2006) 060502], we propose a tripartite quantum state splitting scheme for a sender to achieve the bipartition of his/her arbitrary two-qubit pure state between two sharers. During the scheme design, two novel and important ideas originated, respectively, from Phys. Rev. A74 (2006) 054303 and J. Phys. B41 (2008) 145506 are adopted to enhance the security and optimize resource consumption, operation complexity, and intrinsic efficiency. In the scheme, first the sender performs two Bell-state measurements and publishes the results. Afterwards, if and only if the two sharers cooperate together, they can perfectly restore the sender's quantum pure state by executing first a two-qubit collective unitary operation and then two single-qubit unitary operations.

Asymmetric bidirectional quantum teleportation via six-qubit partially entangled state

2021 ◽  
pp. 2150208
Author(s):  
Jinwei Wang ◽  
Liping Huang
Keyword(s):  
Quantum Channel ◽  
Quantum Teleportation ◽  
Bell State ◽  
Qubit State ◽  
Entangled State ◽  
Controlled Quantum Teleportation ◽  
Single Qubit ◽  
Bidirectional Quantum Teleportation ◽  
Bell State Measurements ◽  
Partially Entangled 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.

Schemes for Teleportation of an Unknown Single-Qubit Quantum State by Using an Arbitrary High-Dimensional Entangled State

2010 ◽  
Vol 27 (1) ◽  
pp. 010307 ◽  
Author(s):  
Zhan You-Bang ◽  
Zhang Qun-Yong ◽  
Wang Yu-Wu ◽  
Ma Peng-Cheng
Keyword(s):  
Quantum State ◽  
High Dimensional ◽  
Entangled State ◽  
Single Qubit

CONTROLLED TELEPORTATION OF AN ARBITRARY THREE-QUBIT STATE THROUGH A GENUINE SIX-QUBIT ENTANGLED STATE AND BELL-STATE MEASUREMENTS

2011 ◽  
Vol 09 (02) ◽  
pp. 763-772 ◽  
Author(s):  
YI-YOU NIE ◽  
YUAN-HUA LI ◽  
JUN-CHANG LIU ◽  
MING-HUANG SANG
Keyword(s):  
Bell State ◽  
Qubit State ◽  
Controlled Teleportation ◽  
Entangled State ◽  
Bell State Measurements

We demonstrate that a genuine six-qubit entangled state introduced by Tapiador et al. [J. Phys. A42 (2009) 415301] can be used to realize the deterministic controlled teleportation of an arbitrary three-qubit state by performing only the Bell-state measurements.

MULTIPARTY QUANTUM STATE SHARING OF m-QUBIT STATE

2007 ◽  
Vol 18 (11) ◽  
pp. 1699-1706 ◽  
Author(s):  
LI DONG ◽  
XIAOMING XIU ◽  
YAJUN GAO
Keyword(s):  
Quantum State ◽  
Unitary Transformation ◽  
Bell State ◽  
Ghz State ◽  
Qubit State ◽  
Particle State ◽  
Quantum State Sharing ◽  
Classical Information ◽  
Computational Basis ◽  
Bell State Measurements

A scheme for quantum state sharing (QSTS) of a one-particle state is proposed for a three-particle GHZ state utilized as a quantum channel. After the sender (Alice) makes Bell-state measurements (BM) on her particles, and the controller (Charlie) performs a computational basis measurement (CM), the recipient (Bob) only needs to carry out a unitary transformation of the classical information from the sender and the controller. Finally, the scheme is generalized to multiparty QSTS of a one-qubit state with n agents and an m-qubit state with n agents.

Experimental realization of quantum controlled teleportation of arbitrary two-qubit state via a five-qubit entangled state

2021 ◽  
Author(s):  
Xiao-Fang Liu ◽  
Dong-Fen Li ◽  
Yun-Dan Zheng ◽  
Xiao-Long Yang ◽  
Jie Zhou ◽  
...  
Keyword(s):  
Density Matrix ◽  
Quantum State ◽  
Bell State ◽  
Third Party ◽  
Controlled Teleportation ◽  
Entangled State ◽  
Entanglement Measure ◽  
Experimental Realization ◽  
Operation Process ◽  
Photonic States

Abstract Quantum controlled teleportation is the transmission of the quantum state under the supervision of a third party. This paper presents a theoretical and experimental combination of an arbitrary two-qubit quantum controlled teleportation scheme. In the scheme, the sender Alice only needs to perform two Bell state measurements, and the receiver Bob can perform the appropriate unitary operation to reconstruct arbitrary two-qubit states under the control of the supervisor Charlie. We verified the operation process of the scheme on the IBM Quantum Experience platform and further checked the accuracy of the transmitted quantum state by performing quantum state tomography. Meanwhile, good fidelity is obtained by calculating the theoretical density matrix and the experimental density matrix. We also introduced a sequence of photonic states to analyze the possible intercept-replace-resend, intercept-measure-resend, and entanglement-measure-resend attacks on this scheme. The results proved that our scheme is highly secure.

Quantum state sharing with mixing state from six-qubit entangled pure one

2020 ◽  
Vol 35 (32) ◽  
pp. 2050264
Author(s):  
Zhanjun Zhang ◽  
Hao Yuan ◽  
Chuanmei Xie ◽  
Biaoliang Ye
Keyword(s):  
Quantum State ◽  
Quantum Channel ◽  
Pure State ◽  
Essential Role ◽  
Entangled States ◽  
Entangled State ◽  
Quantum State Sharing ◽  
Mixing State ◽  
Preliminary Study

In this paper the possibility of using mixing entangled states as quantum channel to accomplish quantum state sharing (QSTS) is considered. As a preliminary study, an efficient tripartite QSTS scheme is put forward by utilizing a mixing entangled state, which is a derivative of a six-qubit entangled pure state under a two-qubit confusion. Some specific discussions about the QSTS scheme are made, including the issues of the scheme determinacy, the sharer symmetry, the scheme security and the essential role of quantum channel as well as the current experimental feasibility.

Simpler criterion on W state for perfect quantum state splitting and quantum teleportation

2009 ◽  
Vol 52 (12) ◽  
pp. 1906-1912 ◽  
Author(s):  
XueQin Zuo ◽  
YiMin Liu ◽  
Wen Zhang ◽  
ZhanJun Zhang
Keyword(s):  
Quantum State ◽  
Quantum Teleportation ◽  
W State ◽  
State Splitting ◽  
Quantum State Splitting

Optimization of coherent attacks in generalizations of the BB84 quantum bit commitment protocol

2002 ◽  
Vol 2 (1) ◽  
pp. 66-96
Author(s):  
R.W. Spekkens ◽  
T. Rudolph
Keyword(s):  
State Estimation ◽  
Quantum State ◽  
Upper Bound ◽  
Upper Bounds ◽  
Entangled State ◽  
Quantum State Estimation ◽  
Quantum Bit ◽  
Bit Commitment ◽  
Single Qubit ◽  
Qubit States

It is well known that no quantum bit commitment protocol is unconditionally secure. Nonetheless, there can be non-trivial upper bounds on both Bob's probability of correctly estimating Alice's commitment and Alice's probability of successfully unveiling whatever bit she desires. In this paper, we seek to determine these bounds for generalizations of the BB84 bit commitment protocol. In such protocols, an honest Alice commits to a bit by randomly choosing a state from a specified set and submitting this to Bob, and later unveils the bit to Bob by announcing the chosen state, at which point Bob measures the projector onto the state. Bob's optimal cheating strategy can be easily deduced from well known results in the theory of quantum state estimation. We show how to understand Alice's most general cheating strategy, (which involves her submitting to Bob one half of an entangled state) in terms of a theorem of Hughston, Jozsa and Wootters. We also show how the problem of optimizing Alice's cheating strategy for a fixed submitted state can be mapped onto a problem of state estimation. Finally, using the Bloch ball representation of qubit states, we identify the optimal coherent attack for a class of protocols that can be implemented with just a single qubit. These results provide a tight upper bound on Alice's probability of successfully unveiling whatever bit she desires in the protocol proposed by Aharonov et al., and lead us to identify a qubit protocol with even greater security.

THE CONCENTRATION PROTOCOL OF A TWO-PARTICLE NON-MAXIMALLY ENTANGLED STATE AMONG THREE CAVITIES

2012 ◽  
Vol 26 (24) ◽  
pp. 1250158
Author(s):  
PENG XU ◽  
LIU YE
Keyword(s):  
Cavity Mode ◽  
Bell State ◽  
Resonant Interaction ◽  
Entangled State ◽  
Photon Detectors ◽  
Maximally Entangled State ◽  
Interaction Detection ◽  
Bell State Measurements ◽  
Separate Cavities

We propose a scheme for concentrating an arbitrary two-particle non-maximally entangled state into a maximally entangled state assisted with three cavities. The scheme involves two interaction–detection cycles and resonant interaction between atom and cavity mode. With the help of the atom trapped in the cavity, the concentration of a two-particle non-maximally entangled state trapped in separate cavities can be realized with a certain probability according to the results of photon detectors. The important feature of our scheme is that we can realize the concentration of an arbitrary two-atom non-maximally entangled state and we do not perform Bell-state measurements.

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