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 Modern Optics

Realization of optimal symmetric universal and phase-covariant quantum cloning with quantum dot spins in cavity QED

Yan‐Qiang Ji, Tao Yu, Ai‐Dong Zhu, Hong‐Fu Wang, Shou Zhang, Kyu-Hwang Yeon, Seong‐Cho Yu

Published Aug 10, 2012• 3 citations
Publisher

Abstract

We present a scheme to implement a special quantum cloning machine with quantum dot spins in cavity QED. The quantum cloning machine copies the information from a photon to other two distant quantum dots trapped in cavities with the help of a single-photon pulse. Choosing the different parameters, the scheme can implement optimal symmetric 1 → 2 universal, optimal symmetric 1 → 2 phase-covariant and optimal symmetric economical 1 → 3 phase-covariant quantum cloning machines. The present scheme is more economical in saving resource compared with previous schemes.

DOI
10.1080/09500340.2012.712727

Related papers

Realization of Optimal Universal and Phase-Covariant Quantum Machines via Input-Output Cavities

Congrong Wang, Da-Chuang Li, Feng‐Yuan Zhang +1 more

We present a scheme to realize a special quantum cloning machine via input-output cavities. The cloning machine can copy information from one atom to another distant atom. Choosing different parameters, the method can perform optimal symmetric (asymmetric) universal quantum cloning and optimal symmetric (asymmetric) phase-covariant cloning. Compared to previous schemes, our scheme is more insensitive to actual environmental noise and can get higher fidelity in a current cavity quantum electrodynamics system with an entangled state acting as a quantum channel than a single-photon pulse.

Chinese Physics Letters•Mar 1, 2013•1 citation

Realization of a universal and phase-covariant quantum cloning machine in separate cavities

Bao‐Long Fang, Qing-Min Song, Ye Liu

We present a scheme to realize a special quantum cloning machine in separate cavities. The quantum cloning machine can copy the quantum information from a photon pulse to two distant atoms. Choosing the different parameters, the method can perform optimal symmetric (asymmetric) universal quantum cloning and optimal symmetric (asymmetric) phase-covariant cloning.

Physical Review A•Apr 8, 2011•16 citations

Nonlocal quantum cloning via quantum dots trapped in distant cavities

Tao Yu, Ai‐Dong Zhu, Shou Zhang

A scheme for implementing nonlocal quantum cloning via quantum dots trapped in cavities is proposed. By modulating the parameters of the system, the optimal 1 → 2 universal quantum cloning machine, 1 → 2 phase-covariant cloning machine, and 1 → 3 economical phase-covariant cloning machine are constructed. The present scheme, which is attainable with current technology, saves two qubits compared with previous cloning machines.

Chinese Physics B•May 1, 2012•4 citations

Nonlocal quantum cloning via quantum dots trapped in distant cavities

Tao Yu, 朱爱东, 张寿

A scheme for implementing nonlocal quantum cloning via quantum dots trapped in cavities is proposed.By modulating the parameters of the system,the optimal 1 → 2 universal quantum cloning machine,1 → 2 phase-covariant cloning machine,and 1 → 3 economical phase-covariant cloning machine are constructed.The present scheme,which is attainable with current technology,saves two qubits compared with previous cloning machines.

中国物理B：英文版•Jan 1, 2012•0 citations

Optimal real state quantum cloning machine in cavity quantum electrodynamics

Wei Xiong, Ye Liu

We propose a scheme to realize a special quantum cloning machine (QCM) in cavity quantum electrodynamics (QED). The QCM can copy the information from one atom to another two distant atoms trapped in cavity QED with the help of a single-photon pulse. By choosing different parameters, we can perform an optimal symmetry 1→2 real state QCM and an optimal symmetry 1→3 economical real state QCM.

Journal of the Optical Society of America B•Aug 26, 2011•11 citations

Optimal universal and phase-covariant quantum cloning machines with quantum-dot spins in cavity QED

Ai‐Dong Zhu, Kyu-Hwang Yeon, Seong‐Cho Yu

Schemes for implementing a 1 ? 2 optimal universal quantum cloning machine (UQCM) and a 1 ? 3 ancilla-free optimal phase-covariant quantum cloning machine (PCCM) are proposed by manipulating the transverse spin?spin interactions of quantum dots mediated by a vacuum single-mode cavity. The interactions among different quantum dots are selectively controlled by the classical laser fields. These quantum cloning machines are more robust due to the very long spin decoherence time of quantum dots. Furthermore, the experimental implementation is simplified in comparison with those using atoms as qubits. The quantum dots are embedded in the cavity simultaneously; hence the troubles caused by the qubits passing through multiple cavities are effectively avoided.

Journal of Physics B Atomic Molecular and Optical Physics•Nov 18, 2009•8 citations
We present a scheme to implement a special quantum cloning machine with quantum dot spins in cavity QED. The quantum cloning machine copies the information from a photon to other two distant quantum dots trapped in cavities with the help of a single-photon pulse. Choosing the different parameters, the scheme can implement optimal symmetric 1 → 2 universal, optimal symmetric 1 → 2 phase-covariant and optimal symmetric economical 1 → 3 phase-covariant quantum cloning machines. The present scheme is more economical in saving resource compared with previous schemes.
We present a scheme to realize a special quantum cloning machine via input-output cavities. The cloning machine can copy information from one atom to another distant atom. Choosing different parameters, the method can perform optimal symmetric (asymmetric) universal quantum cloning and optimal symmetric (asymmetric) phase-covariant cloning. Compared to previous schemes, our scheme is more insensitive to actual environmental noise and can get higher fidelity in a current cavity quantum electrodynamics system with an entangled state acting as a quantum channel than a single-photon pulse.
Schemes for implementing a 1 ? 2 optimal universal quantum cloning machine (UQCM) and a 1 ? 3 ancilla-free optimal phase-covariant quantum cloning machine (PCCM) are proposed by manipulating the transverse spin?spin interactions of quantum dots mediated by a vacuum single-mode cavity. The interactions among different quantum dots are selectively controlled by the classical laser fields. These quantum cloning machines are more robust due to the very long spin decoherence time of quantum dots. Furthermore, the experimental implementation is simplified in comparison with those using atoms as qubits. The quantum dots are embedded in the cavity simultaneously; hence the troubles caused by the qubits passing through multiple cavities are effectively avoided.