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Laser Physics Letters

Joint remote state preparation of a qubit via triatomic W entangled state based on cavity QED

Fang Li, Xiaogang Wang, Xiao-Qi Xiao

Published Aug 1, 2025• 1 citation
Publisher

Abstract

Abstract A physical protocol for joint preparation of a single atomic qubit state remotely in the context of an atom system from two senders and one receiver spatially separated is proposed. A triatomic entangled W-type state is used as the quantum channel, and the control of the state of a single two-level atom can be achieved by the interaction of the atom and the classical field. We show that the joint remote state preparation of an atomic single qubit can be successful in a probabilistic manner under the condition that the classical information of the single-qubit state is split in the correct way.

DOI
10.1088/1612-202x/adf825

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Abstract A physical protocol for joint preparation of a single atomic qubit state remotely in the context of an atom system from two senders and one receiver spatially separated is proposed. A triatomic entangled W-type state is used as the quantum channel, and the control of the state of a single two-level atom can be achieved by the interaction of the atom and the classical field. We show that the joint remote state preparation of an atomic single qubit can be successful in a probabilistic manner under the condition that the classical information of the single-qubit state is split in the correct way.
A physical protocol for joint preparing a single atomic qubit state remotely in context of the atom system from spatially separated two senders and one receiver is proposed. A triatomic entangled W type state is worked as the quantum channel, and the control of the state of a single two-level atom can be achieved by the interaction of the atom and the classical field. It shows that the JRSP of an atomic single-qubit can be success in a probabilistic manner in certain condition that the classical information of the single-qubit state is split in some proper ways.
In this paper, a physical scheme for remotely preparing a diatomic entangled state via a two-atom entangled state and a triatomical entangled W state is presented by applying the cavity quantum electrodynamics technique. The original state can be transmitted to either one of the receivers by introducing a auxiliary cavity. Two different kinds of atom-cavity interactions are utilized at the sender's and the receiver's site, respectively. The total success probability for each receiver is obtained, which will be equal in certain condition.
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.
A scheme for remote preparation of field (atomic) states is proposed. Protocol execution requires cavity QED based atom-field interactions successively supplemented with Ramsey interferometry. The state to be remotely prepared at the receiver's end is acquired by deterministically manipulating the sender's component of the pre-shared entangled state. In the case of field entanglement, it is carried out with the help of an atom that passes through the sender's cavity and then traverses a classical external field for specified times prior to detection. However, for atomic entangled states, only interactions with the classical field suffice to complete the task. The scheme guarantees good success probability with high fidelity and requires one bit of classical communication.
For M -sender independently share the classical knowledge of a quantum state, a scheme for joint remote preparation of an arbitrary two-qubit state by GHZ-type states as the quantum channel is presented. It is shown that the receiver can reconstruct the original state with certain probability under the condition that only and only if all the senders collaborate with each other. The single-qubit and two-qubit projective measurements are needed in our scheme. We also discuss some information-splitting methods which can make the receiver obtain the unknown state.