Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of Hengyang Normal University

Scheme for Implementing A Fredkin Gate with A Four-level Atom in Two-mode Cavity Quantum Electrodynamics

Gao Feng

Published Jan 1, 2009• 0 citations
OpenAlex

Abstract

A scheme is proposed for realization of three-qubit Fredkin gate for two intracavity modes with a four-level atom through the atom-cavity resonant interaction in a cavity quantum electrodynamics system.In the presented protocol,the two states of the atom form the controlling qubit and the two quantized cavity-field modes act as the two target qubits.The experimental feasibility of our proposal are also discussed.

Related papers

Realization of Three-Qubit Controlled-Phase Gate Operation with Atoms in Cavity QED System

Shi-Qing Tang, Deng-Yu Zhang, Xie Li-Jun +2 more

We propose a scheme for realization of three-qubit controlled-phase gate via passing two three-level atoms through a high-Q optical cavity in a cavity QED system. In the presented protocol, the two stable ground states of the atoms act as the two controlling qubits and the zero- and one-photon Fock states of the cavity-field form the target qubit, and no auxiliary state or any measurement is required. The numerical simulation shows that the gate fidelities remain at a high level under the influence of the atomic spontaneous emission, the decay of the cavity mode and deviation of the coupling strength. The experimental feasibility of our proposal is also discussed.

Chinese Physics Letters•Feb 1, 2009•10 citations

Three-qubit Fredkin gate based on cavity quantum electrodynamics

Shao Xiao-Qiang, Chen Li, Zhang Shou

This paper presents a scheme for implementing a Fredkin gate on three modes of a cavity. The scheme is based on the dispersive atom-cavity interaction. By modulating the cavity frequency and the atomic transition frequency appropriately, it obtains the effective form of nonlinear interaction between photons in the three-mode cavity. This availability is testified via numerical analysis. It also considers both the situations with and without dissipation.

Chinese Physics B•Jul 31, 2009•5 citations

Selective Atom-Cavity Interaction Scheme for Quantum Controlled-NOT Gate Using Four-Level Atoms in Cavity QED System

Shi-Qing Tang, Deng-Yu Zhang, Xie Li-Jun +2 more

We propose a scheme for realization a quantum Controlled-NOT gate operation using two four-level atoms through a selective atom–cavity interaction in cavity quantum electrodynamics system. In our protocol, the quantum information is encoded on the stable ground states of the two atoms. During the interaction between atoms and single-mode vacuum cavity-field, the atomic spontaneous emission is negligible as the large atom–cavity detuning effectively suppresses the spontaneous decay of the atoms. The influences of the dissipation and the deviation of interaction time on fidelity and corresponding success probability of the quantum Controlled-NOT gate and the experimental feasibility of our proposal are also discussed.

Communications in Theoretical Physics•Feb 1, 2009•12 citations

Efficient Scheme for Implementing a Fredkin Gate via Resonant Interaction with Two-Mode Cavity Quantum Electrodynamics

Shao Xiao-Qiang, Wen Jing-Ji, Jin Xing-Ri +3 more

A scheme for implementing a Fredkin gate with an atom sent through a microwave cavity is proposed. The scheme is based on the resonant atom-cavity interaction so that the gating time is sharply short, which is important in view of decoherence.

Chinese Physics Letters•Sep 28, 2007•5 citations

Two simple schemes for implementing Toffoli gate via atom–cavity field interaction in cavity quantum electrodynamics

Shao Xiao-Qiang, Chen Li, Zhang Shou

This paper proposes two schemes for implementing three-qubit Toffoli gate with an atom (as target qubit) sent through a two-mode cavity (as control qubits). The first scheme is based on the large-detuning atom–cavity field interaction and the second scheme is based on the resonant atom-field interaction. Both the situations with and without cavity decay and atomic spontaneous emission are considered. The advantages and the experimental feasibility of these two schemes are discussed.

Chinese Physics B•Feb 1, 2009•4 citations

Quantum Three-Qubit Phase Gate Operation by Using an Artificial Atom in a Three-Mode Cavity

Li Xin Xia, Qianzhao Lei

We propose a scheme for realizing quantum three-qubit phase gate operation, in a three-mode cavity where the large detuned cavity-mode fields interact with the four-level artificial atom of an rf-SQUID in tripod-type configuration. In this scheme, the two lowest levels of the artificial atom represent the two logical states of the target qubit and two cavity-mode states are the control qubits, while the third cavity-mode field serves the gate manipulation. Since only the metastable lower levels are involved in the gate operations, the gate is insensitive to the decay rates of the artificial atom, which makes this scheme advantageous and it is important in view of decoherence.

Advanced materials research•Jul 1, 2011•0 citations
A scheme is proposed for realization of three-qubit Fredkin gate for two intracavity modes with a four-level atom through the atom-cavity resonant interaction in a cavity quantum electrodynamics system.In the presented protocol,the two states of the atom form the controlling qubit and the two quantized cavity-field modes act as the two target qubits.The experimental feasibility of our proposal are also discussed.
We propose a scheme for realization of three-qubit controlled-phase gate via passing two three-level atoms through a high-Q optical cavity in a cavity QED system. In the presented protocol, the two stable ground states of the atoms act as the two controlling qubits and the zero- and one-photon Fock states of the cavity-field form the target qubit, and no auxiliary state or any measurement is required. The numerical simulation shows that the gate fidelities remain at a high level under the influence of the atomic spontaneous emission, the decay of the cavity mode and deviation of the coupling strength. The experimental feasibility of our proposal is also discussed.
We propose a scheme for realization a quantum Controlled-NOT gate operation using two four-level atoms through a selective atom–cavity interaction in cavity quantum electrodynamics system. In our protocol, the quantum information is encoded on the stable ground states of the two atoms. During the interaction between atoms and single-mode vacuum cavity-field, the atomic spontaneous emission is negligible as the large atom–cavity detuning effectively suppresses the spontaneous decay of the atoms. The influences of the dissipation and the deviation of interaction time on fidelity and corresponding success probability of the quantum Controlled-NOT gate and the experimental feasibility of our proposal are also discussed.
We propose a scheme for realizing quantum three-qubit phase gate operation, in a three-mode cavity where the large detuned cavity-mode fields interact with the four-level artificial atom of an rf-SQUID in tripod-type configuration. In this scheme, the two lowest levels of the artificial atom represent the two logical states of the target qubit and two cavity-mode states are the control qubits, while the third cavity-mode field serves the gate manipulation. Since only the metastable lower levels are involved in the gate operations, the gate is insensitive to the decay rates of the artificial atom, which makes this scheme advantageous and it is important in view of decoherence.