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

International Journal of Quantum Information

REALIZATION OF NONLOCAL QUANTUM GATE THROUGH ASSISTED-CAVITIES

Wei Xiong, Tao Wu, Ye Liu

Published Mar 1, 2012• 2 citations
Publisher

Abstract

We propose a scheme for implementing a three-qubit controlled-Not-Not (CNNOT) gate and a two-qubit SWAP gate between atoms and single-photon pulse through cavity QED. In the scheme, we can one-step realize multiple-qubit GHZ state and two-qubit Bell state by applying multiple-qubits CNNOT gate. We have also shown that our scheme would be robust against practical imperfections in current cavity QED experiment setup through simple numerical estimates. Finally, we provide the current parameters to show that our scheme is feasible.

DOI
10.1142/s0219749912500116

Related papers

A SCHEME FOR REALIZATION OF TWO-QUBIT LOGIC GATES IN CAVITY QED

Bao‐Long Fang, Hong-Bo Wan, Ye Liu

We propose a simple scheme for realizing two-qubit logic gate in cavity QED. In our scheme, the quantum controlled-not gate, phase gate and swap gate can be implemented without the ancillary level. The quantum controlled-not gate and phase gate can be realized easily by only one interaction between atoms and a highly detuned cavity mode with the assistance of a strong classical field. Thus, the scheme is insensitive to both the cavity decay and the thermal field.

Modern Physics Letters B•Jan 10, 2010•0 citations

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

One-step implementation of a multiqubit phase gate with one control qubit and multiple target qubits in coupled cavities

Hong‐Fu Wang, Ai‐Dong Zhu, Shou Zhang

We propose a one-step scheme to implement a multiqubit controlled phase gate with one qubit simultaneously controlling multiple qubits with three-level atoms at distant nodes in coupled cavity arrays. Selective qubit-qubit couplings are achieved by adiabatically eliminating the atomic excited states and photonic states, and the required phase shifts between the control qubit and any target qubit can be realized through suitable choices of the parameters of the external fields. Moreover, the effective model is robust against decoherence because neither the atoms nor the field modes are excited during the gate operation, leading to a useful step toward scalable quantum computing networks.

arXiv:1402.0650•Optics Letters•Mar 7, 2014•35 citations

Implementing Remote Controlled Not Gate of the Coherent State Cavity Field and Entanglement Swapping Via Cavity QED

Zheng Shi-cai

Proposes a new scheme,which is based on the non-resonance interaction between the Ξ-type three-level atom and the coherent state cavity field,to implement remote controlled-not gate of the coherent cavity field and entanglement swapping without Bell-state measure via the CNOT gate of atom and cavity.In this process,since the cavity field does not exchange energy with the atoms,thus the decoherence due to the decay of the cavity can be effectively suppressed.So the protocol is experimentally feasible based on the current cavity QED technique.

Journal of Fujian Normal University•Jan 1, 2008•0 citations

Feasible schemes for quantum swap gates of optical qubits via cavity QED

Deng-Yu Zhang, Shi-Qing Tang, Xin-Wen Wang +2 more

Feasible schemes for implementing quantum swap gates of both coherent-state qubits and photonic qubits are proposed using a Λ-type atomic ensemble trapped in a bimodal optical cavity. In both protocols, the decoherence from atomic spontaneous emission is negligible due to the fact that the excited states of the atoms are adiabatically eliminated under large detuning condition and the swap gates can be created in a single step. In our schemes, the required atoms—cavity interaction time decreases with the increase of the number of atoms, which is very important in view of decoherence. The experimental feasibilities of the schemes are also discussed.

Chinese Physics B•Apr 1, 2011•4 citations

Implementation scheme of controlled SWAP gates for quantum fingerprinting and photonic quantum computation

B. Wang, Luming Duan

We propose a scheme to implement quantum controlled SWAP gates by directing single-photon pulses to a two-sided cavity with a single trapped atom. The resultant gates can be used to realize quantum fingerprinting and universal photonic quantum computation. We present a theoretical model for our scheme and analyze its performance under practical noise, including spontaneous emission and randomness of atom-cavity coupling strength. It is shown that our scheme should be robust against practical imperfections in current cavity QED experiment setup.

arXiv:quant-ph/0610035•Physical Review A•May 18, 2007•44 citations
We propose a scheme for implementing a three-qubit controlled-Not-Not (CNNOT) gate and a two-qubit SWAP gate between atoms and single-photon pulse through cavity QED. In the scheme, we can one-step realize multiple-qubit GHZ state and two-qubit Bell state by applying multiple-qubits CNNOT gate. We have also shown that our scheme would be robust against practical imperfections in current cavity QED experiment setup through simple numerical estimates. Finally, we provide the current parameters to show that our scheme is feasible.
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 one-step scheme to implement a multiqubit controlled phase gate with one qubit simultaneously controlling multiple qubits with three-level atoms at distant nodes in coupled cavity arrays. Selective qubit-qubit couplings are achieved by adiabatically eliminating the atomic excited states and photonic states, and the required phase shifts between the control qubit and any target qubit can be realized through suitable choices of the parameters of the external fields. Moreover, the effective model is robust against decoherence because neither the atoms nor the field modes are excited during the gate operation, leading to a useful step toward scalable quantum computing networks.
Proposes a new scheme,which is based on the non-resonance interaction between the Ξ-type three-level atom and the coherent state cavity field,to implement remote controlled-not gate of the coherent cavity field and entanglement swapping without Bell-state measure via the CNOT gate of atom and cavity.In this process,since the cavity field does not exchange energy with the atoms,thus the decoherence due to the decay of the cavity can be effectively suppressed.So the protocol is experimentally feasible based on the current cavity QED technique.
Feasible schemes for implementing quantum swap gates of both coherent-state qubits and photonic qubits are proposed using a Λ-type atomic ensemble trapped in a bimodal optical cavity. In both protocols, the decoherence from atomic spontaneous emission is negligible due to the fact that the excited states of the atoms are adiabatically eliminated under large detuning condition and the swap gates can be created in a single step. In our schemes, the required atoms—cavity interaction time decreases with the increase of the number of atoms, which is very important in view of decoherence. The experimental feasibilities of the schemes are also discussed.
We propose a scheme to implement quantum controlled SWAP gates by directing single-photon pulses to a two-sided cavity with a single trapped atom. The resultant gates can be used to realize quantum fingerprinting and universal photonic quantum computation. We present a theoretical model for our scheme and analyze its performance under practical noise, including spontaneous emission and randomness of atom-cavity coupling strength. It is shown that our scheme should be robust against practical imperfections in current cavity QED experiment setup.