scholarly journals Quantum Cloning for Absolute Radiometry

2010 ◽  
Vol 105 (8) ◽  
Author(s):  
Bruno Sanguinetti ◽  
Enrico Pomarico ◽  
Pavel Sekatski ◽  
Hugo Zbinden ◽  
Nicolas Gisin
Keyword(s):  
Quantum Cloning ◽  
Absolute Radiometry

All-Optical Optimal N -to- M Quantum Cloning of Coherent States

2021 ◽  
Vol 126 (6) ◽  
Author(s):  
Shengshuai Liu ◽  
Yanbo Lou ◽  
Yingxuan Chen ◽  
Jietai Jing
Keyword(s):  
Coherent States ◽  
Quantum Cloning ◽  
All Optical

Weak measurement induced asymmetric quantum cloning

2020 ◽  
Vol 17 (8) ◽  
pp. 085203 ◽  
Author(s):  
Bao-Long Fang ◽  
Jiaojiao Chen ◽  
Feng Chen ◽  
Liu Ye
Keyword(s):  
Weak Measurement ◽  
Quantum Cloning ◽  
Asymmetric Quantum

scholarly journals Quantum cloning machines of ad-level system

2001 ◽  
Vol 64 (6) ◽  
Author(s):  
Heng Fan ◽  
Keiji Matsumoto ◽  
Miki Wadati
Keyword(s):  
Level System ◽  
Quantum Cloning

scholarly journals Role of interference in quantum cloning

2008 ◽  
Vol 78 (4) ◽  
Author(s):  
Benoit Roubert ◽  
Daniel Braun
Keyword(s):  
Quantum Cloning

Quantum cloning of identical mixed qubits

2007 ◽  
Vol 7 (5&6) ◽  
pp. 551-558
Author(s):  
H. Fan ◽  
B.-Y. Liu ◽  
K.-J. Shi
Keyword(s):  
Upper Bound ◽  
Quantum Cloning ◽  
Single Qubit ◽  
Antisymmetric State ◽  
Pure States ◽  
Symmetric States

Quantum cloning of two identical mixed qubits $\rho \otimes \rho$ is studied. We propose the quantum cloning transformations not only for the triplet (symmetric) states but also for the singlet (antisymmetric) state. We can copy these two identical mixed qubits to $M$ ($M\ge 2$) copies. This quantum cloning machine is optimal in the sense that the shrinking factor between the input and the output single qubit achieves the upper bound. The result shows that we can copy two identical mixed qubits with the same quality as that of two identical pure states.

Realizing various approximate quantum cloning with XY-type exchange interactions of flux qubits

2014 ◽  
Vol 28 (14) ◽  
pp. 1450081 ◽  
Author(s):  
Na Li ◽  
Liu Ye
Keyword(s):  
Quantum Interference ◽  
Exchange Interactions ◽  
Quantum Cloning ◽  
Superconducting Quantum Interference Devices ◽  
Superconducting Quantum Interference ◽  
Flux Qubits ◽  
Universal Quantum ◽  
Experimental Technology ◽  
Real State

In this paper, we realize all kinds of 1 → 2 approximate quantum cloning, including optimal 1 → 2 symmetric (or asymmetric) universal quantum cloning (UQC) and phase-covariant cloning (PCC), symmetric economical phase-covariant cloning (EPCC) and real state quantum cloning, with the XY-type exchange interactions of the flux qubits which are coupled by dc superconducting quantum interference devices (SQUIDs). It is shown that our schemes can be realized with the current experimental technology.

scholarly journals Quantum Switchboard with Coupled-Cavity Array

2021 ◽  
Author(s):  
Wai-Keong Mok ◽  
Leong-Chuan Kwek
Keyword(s):  
Quantum Information ◽  
Quantum Computation ◽  
Scaling Up ◽  
Quantum Network ◽  
Quantum Cloning ◽  
Physical Implementation ◽  
Large Quantum ◽  
Coupled Cavity ◽  
Cavity Array

The ability to control the flow of quantum information deterministically is useful for scaling up quantum computation. In this paper, we demonstrate a controllable quantum switchboard which directs the teleportation protocol to one of two targets, fully dependent on the sender’s choice. The quantum switchboard additionally acts as a optimal quantum cloning machine. We also provide a physical implementation of the proposal using a coupled-cavity array. The proposed switchboard can be utilized for the efficient routing of quantum information in a large quantum network.

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