scholarly journals Nonmaximal Entanglement Can Make Joint Remote State Preparation Absolutely Secure

2013 ◽  
Vol 23 (2) ◽  
pp. 97
Author(s):  
Cao Thi Bich ◽  
Nguyen Ba An
Keyword(s):  
Quantum State ◽  
Quantum Channel ◽  
The State ◽  
Remote State Preparation ◽  
Entangled States ◽  
Joint Remote State Preparation ◽  
State Preparation ◽  
Quantum Task

Joint remote state preparation is a multiparty global quantum task in which several parties are assigned to jointly prepare a quantum state for a remote party. Although various protocols have been proposed so far, none of them are absolutely secure in the sense that the legitimate parties (the preparers plus the receiver) can by no means identify the state to be prepared even if they all collude with each other. Here we resolve this drawback by employing the quantum channel in terms of nonmaximally entangled states whose parameters are kept secret to all the participants but used to split the information in a judicious way so that not only absolute security in the above-mentioned sense is achieved but also the performance is the simplest possible.

MULTIPARTY REMOTELY PREPARING MULTIPARTITE EQUATORIAL ENTANGLED STATES IN HIGH DIMENSIONS

2011 ◽  
Vol 09 (06) ◽  
pp. 1437-1448
Author(s):  
YI-BAO LI ◽  
KUI HOU ◽  
SHOU-HUA SHI
Keyword(s):  
Quantum State ◽  
Quantum Channel ◽  
Success Probability ◽  
Quantum States ◽  
Remote State Preparation ◽  
Entangled States ◽  
Entangled State ◽  
High Dimensions ◽  
Original State ◽  
State Preparation

We propose two kinds of schemes for multiparty remote state preparation (MRSP) of the multiparticle d-dimensional equatorial quantum states by using partial entangled state as the quantum channel. Unlike more remote state preparation scheme which only one sender knows the original state to be remotely prepared, the quantum state is shared by two-party or multiparty in this scheme. We show that if and only if all the senders agree to collaborate with each other, the receiver can recover the original state with certain probability. It is found that the total success probability of MRSP is only by means of the smaller coefficients of the quantum channel and the dimension d.

REMOTE STATE PREPARATION IN NON-MARKOVIAN ENVIRONMENT

2012 ◽  
Vol 10 (03) ◽  
pp. 1250030 ◽  
Author(s):  
YANLIANG ZHANG ◽  
QINGPING ZHOU ◽  
GUODONG KANG ◽  
FANG ZHOU ◽  
XIAOBO WANG
Keyword(s):  
Quantum Channel ◽  
Communication Channel ◽  
Quantum Communication ◽  
Remote State Preparation ◽  
Entangled States ◽  
Particle State ◽  
Noisy Environments ◽  
Initial State ◽  
State Preparation ◽  
Over Time

We present a scheme for remote preparing a general two-particle state by two entangled states serving as the quantum communication channel. In this scheme, it is possible for the receiver to perfectly reconstruct the initial state that the sender hopes to prepare with the method of introducing an auxiliary qubit and postselection measurements in the situation of non-maximal entangled quantum channel. Furthermore, we investigate the influence of the dissipation factors on the processing of the remote state preparation when the entangled resources are in the Markovian and non-Markovian noisy environments. It is shown that the fidelity of remote state preparation is decreasing exponentially over time in Markovian environments and attenuating oscillatorily in non-Markovian. However, when the non-Markovian and the detuning conditions are satisfied simultaneously, the fidelity can be preserved at comparative high levels, effectively.

Deterministic joint remote state preparation via partially entangled quantum channel

2016 ◽  
Vol 14 (03) ◽  
pp. 1650015 ◽  
Author(s):  
Na Chen ◽  
Dong-Xiao Quan ◽  
Chang-Hua Zhu ◽  
Jia-Zhen Li ◽  
Chang-Xing Pei
Keyword(s):  
Quantum Channel ◽  
Success Probability ◽  
Remote State Preparation ◽  
Entangled State ◽  
Joint Remote State Preparation ◽  
State Preparation ◽  
Single Qubit ◽  
Unit Success Probability ◽  
Channel Parameter ◽  
Partially Entangled State

In this paper, we propose a scheme for deterministic joint remote state preparation (JRSP). Two spatially separated senders intend to help a receiver remotely prepare an arbitrary single-qubit state. Four-particle partially entangled state is constructed to serve as the quantum channel. By determining right unitary operations for the senders and appropriate recovery operations for the receiver, the target state can be reestablished with unit success probability, irrespective of the channel parameter.

Minimum remote state preparation of an arbitrary two-level one-atom state via cavity QED

2015 ◽  
Vol 13 (02) ◽  
pp. 1550009
Author(s):  
Yahong Wang ◽  
Changshui Yu
Keyword(s):  
Quantum Channel ◽  
Cavity Qed ◽  
Ghz State ◽  
The State ◽  
Remote State Preparation ◽  
State Preparation ◽  
The Third ◽  
First Case ◽  
Theoretical Proposal

In this paper, we propose three schemes for remotely state preparation (RSP) an arbitrary two-level one-atom state via cavity quantum electro dynamics (QED) with minimal resources consumption. In the first case, a Greenberger–Horne–Zeilinger (GHZ) state is used as quantum channel; in the second case, the sender needs to construct an quantum channel with both of the assistant of cavity QED and the knowledge about the state to be remotely prepared. In each scheme, only 1 cbit and 1 ebit are needed with the aid of cavity QED. In the third case, we combine the first two protocols and give a theoretical proposal for controlled RSP with only 2 cbits and 1 ebit resources consumption.

Experimental architecture of joint remote state preparation

2011 ◽  
Vol 11 (3) ◽  
pp. 751-767 ◽  
Author(s):  
Ming-Xing Luo ◽  
Xiu-Bo Chen ◽  
Yi-Xian Yang ◽  
Xin-Xin Niu
Keyword(s):  
Remote State Preparation ◽  
Joint Remote State Preparation ◽  
State Preparation ◽  
Experimental Architecture
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