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

Acta Physica Sinica

AN EASY WAY FOR CONSTRUCTING FREDKIN QUANTUM GATE

Deng-Yu Zhang, Mingsheng Zhan, (1)中国科学院安徽光学精密机械研究所激光光谱学开放实验室; (2)中国科学院武汉物理研究所波谱与原子分子物理国家重点实验室

Published Jan 1, 1997• 1 citation
Publisher

Abstract

We propose a method for constructing Fredkin gate by using basic 2 bit quantum gates,which is based on A.Darenco's work.Compared with H.F.Chau's scheme,this scheme is easier to construct and to understand,as well as to put into practice.
DOI
10.7498/aps.46.2344

Related papers

Two-bit Quantum Gates to Implement N-bit Quantum Gates

Zhang Deng

We propose a method for constructing n bit quantum gate (Λ n-1 (W) gate) by using basic 2 bit quantum gates,which is based on Barencos work.This scheme is easier to construct and to implement.

Journal of Optoelectronics·laser•Jan 1, 2001•0 citations

Simple Realization of the Fredkin Gate using a Series Of Two-Body Operators

H. F. Chau, Frank A. Wilczek

The Fredkin three-bit gate is universal for computational logic, and is reversible. Classically, it is impossible to do universal computation using reversible two-bit gates only. Here we construct the Fredkin gate using a combination of six two-body reversible (quantum) operators.

arXiv:quant-ph/9503005•Physical Review Letters•Jul 24, 1995•59 citations

Five two-bit quantum gates are sufficient to implement the quantum Fredkin gate

John A. Smolin, David Peter Divincenzo

We present an analytic construction of the three-bit quantum conditional swap (Fredkin) gate that uses only five quantum gates, each acting on only two qubits. Our implementation is based on previous work on the three-bit quantum conditional-NOT (Toffoli) gate. Numerical evidence suggests that this is a minimal implementation. \textcopyright{} 1996 The American Physical Society.

Physical Review A•Apr 1, 1996•276 citations

Methods for a linear optical quantum Fredkin gate

Yan-Xiao Gong, Guang‐Can Guo, Timothy C. Ralph

We consider the realization of a quantum Fredkin gate with only linear optics and single photons. First we construct a heralded Fredkin gate using four heralded controlled-NOT (CNOT) gates. Then we simplify this method to a post-selected one utilizing only two CNOT gates. We also give a possible realization of this method which is feasible with current experimental technology. Another post-selected scheme requires time entanglement of the input photons but needs no ancillary photons.

arXiv:0804.0992•Physical Review A•Jul 2, 2008•57 citations

Efficient and deterministic high-dimensional controlled-swap gates on hybrid linear optical systems with high fidelity

Gui-Long Jiang, Jun-Bin Yuan, Wen-Qiang Liu +1 more

Implementation of quantum logic gates with linear optical elements plays a prominent role in quantum computing due to the relatively easier manipulation and realization. We present efficient schemes to implement controlled-NOT (CNOT) gate and controlled-swap (Fredkin) gate by solely using linear optics. We encode the control qubits and target qudits in photonic polarization (two-level) and spatial degrees of freedom ($d$-level), respectively. Based on the hybrid encoding, CNOT and Fredkin gates are constructed in a deterministic way without any borrowed ancillary photons or measurement-induced nonlinearities. Remarkably, the number of linear optics required to implement a CNOT gate has been reduced to one polarization beam splitter (PBS), while only $d$ PBSs are necessary to implement a generalized Fredkin gate. The optical depths of all schemes are reduced to one and dimension-independent. Besides, the fidelity of our three-qubit Fredkin gate is higher than 99.7\% under realistic conditions, which is higher than the previous schemes.

quant-pharXiv:2602.09393•Feb 11, 2026•0 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
Implementation of quantum logic gates with linear optical elements plays a prominent role in quantum computing due to the relatively easier manipulation and realization. We present efficient schemes to implement controlled-NOT (CNOT) gate and controlled-swap (Fredkin) gate by solely using linear optics. We encode the control qubits and target qudits in photonic polarization (two-level) and spatial degrees of freedom (ddd-level), respectively. Based on the hybrid encoding, CNOT and Fredkin gates are constructed in a deterministic way without any borrowed ancillary photons or measurement-induced nonlinearities. Remarkably, the number of linear optics required to implement a CNOT gate has been reduced to one polarization beam splitter (PBS), while only ddd PBSs are necessary to implement a generalized Fredkin gate. The optical depths of all schemes are reduced to one and dimension-independent. Besides, the fidelity of our three-qubit Fredkin gate is higher than 99.7\% under realistic conditions, which is higher than the previous schemes.