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.

One-party controlled minimum remote state preparation of equatorial n-qubit states

2014 ◽  
Vol 12 (06) ◽  
pp. 1450038 ◽  
Author(s):  
Yahong Wang ◽  
Hongwei Liang
Keyword(s):  
Quantum Channel ◽  
Ghz State ◽  
Qubit State ◽  
Remote State Preparation ◽  
Bloch Sphere ◽  
State Preparation ◽  
Epr Pairs ◽  
Controlled Remote State Preparation ◽  
Qubit States

This paper offers a theoretical protocol for one-party controlled remote state preparation (RSP) of n-qubit states with minimum resources consumption. We are mainly focused on the case of the n-qubit state chosen from equatorial circle on a Bloch sphere. We use n - 1 EPR pairs and one GHZ state as quantum channel and show that only n + 1 cbits, n ebits and 2n + 1 qubits are consumed during the controlled RSP processing.

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.

Controlled cyclic remote state preparation of single-qutrit equatorial states

2021 ◽  
Author(s):  
Jin Shi
Keyword(s):  
Quantum Channel ◽  
Remote State Preparation ◽  
Entangled State ◽  
State Preparation ◽  
Single Qudit

The scheme for controlled unidirectional cyclic remote state preparation of single-qutrit equatorial states is put forward. Alice, Bob, Charlie, and David share a seven-qutrit entangled state as the quantum channel. Under the control of David, Alice can remotely prepare a single-qutrit equatorial state at Bob’s site, Bob can remotely prepare a single-qutrit equatorial state at Charlie’s site, Charlie can remotely prepare a single-qutrit equatorial state at Alice’s site simultaneously. The direction of controlled unidirectional cyclic remote state preparation can be reversed by changing measured qutrits of the quantum channel. The scheme for controlled bidirectional cyclic remote state preparation of single-qutrit equatorial states is also proposed. The schemes can be generalized to controlled unidirectional and bidirectional multi-party cyclic remote state preparation of single-qudit equatorial states.

COLLECTIVE REMOTE STATE PREPARATION

2008 ◽  
Vol 06 (05) ◽  
pp. 1051-1066 ◽  
Author(s):  
NGUYEN BA AN ◽  
JAEWAN KIM
Keyword(s):  
Success Probability ◽  
The State ◽  
Remote State Preparation ◽  
The Other ◽  
Quantum Circuits ◽  
State Preparation ◽  
Remote Location ◽  
Simple Quantum ◽  
Classical Knowledge ◽  
Analytical Expressions

We show that any M ≥ 2 distant parties who independently share the complete classical knowledge of a secret qubit state can collectively prepare the state at another remote location. Two distinct schemes for such a task are proposed: one via a single (M + 1)-partite GHZ-type state and the other via M EPR-type pairs. Analytical expressions of the total success probability are derived explicitly for both the schemes. Of interest is the M-dependence of both the success probability and the receiver's action. We also construct simple quantum circuits for the two-qubit operators whose execution is necessary to accomplish the schemes.

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