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Linear amplification and quantum cloning for non-Gaussian continuous variables
Linear amplification quantum cloning non-Gaussian continuous variables
2010/10/19
We investigate phase-insensitive linear amplification at the quantum limit for single- and two-mode states and show that there exists a broad class of non-Gaussian states whose nonclassicality survive...
On quantum estimation, quantum cloning and finite quantum de Finetti theorems
On quantum estimation quantum cloning finite quantum de Finetti theorems
2010/11/4
This paper presents a series of results on the interplay between quantum estimation, cloning and finite de Finetti theorems. First, we consider the measure-and-prepare channel that uses optimal estim...
The inability to produce two perfect copies of an unknown state is inherently linked with the inability to produce maximal entanglement between multiple spins. Despite this, there is no quantitative l...
Decoherence, Einselection and Classicality of a Macroscopic Quantum Superposition generated by Quantum Cloning
Decoherence Einselection and Classicality Macroscopic Quantum Superposition Quantum Cloning
2010/4/8
The high resilience to de-coherence shown by a recently discovered Macroscopic Quantum Superposition (MQS) generated by a quantum injected optical parametric amplifier (QI-OPA) and involving a number ...
Eavesdropping of two-way coherent-state quantum cryptography via Gaussian quantum cloning machines
two-way coherent-state quantum cryptography Gaussian quantum cloning machines
2010/4/9
We consider one of the quantum key distribution protocols recently introduced in Ref. [Pirandola et al., Nature Physics 4, 726 (2008)]. This protocol consists in a two-way quantum communication betwee...
Scheme for Implementing Quantum Cloning Restoring Machine in Cavity QED
quantum cloning quantum restoring machine cavity QED technique
2007/8/15
2007Vol.47No.2pp.244-246DOI:
Scheme for Implementing Quantum Cloning Restoring Machine in Cavity QED
YU Long-Bao,1 ZHANG Wen-Hai,1,2 and YE Liu1
1 School of Physics & M...
Assisted Cloning and Orthogonal Complementing of an Arbitrary Unknown
Two-Qubit Entangled State
quantum cloning arbitrary two-qubit entangled state
two-qubit projective measurement
2007/8/15
2006Vol.46No.5pp.849-852DOI:
Assisted Cloning and Orthogonal Complementing of an Arbitrary Unknown
Two-Qubit Entangled State
FANG Ming,1 LIU Yi-Min,2,3 LIU Jun,1 SHI Shou-Hua,1 an...
Quantum Logic Network for Probabilistic Cloning Quantum States
quantum logic network probabilistic cloning quantum state
2007/8/15
2005Vol.43No.1pp.73-78DOI:
Quantum Logic Network for Probabilistic Cloning Quantum States
GAO Ting,1,2,4 YAN
Feng-Li,3,4 and WANG
Zhi-Xi1
1 Department of Mathematics, ...
Quantum Anti-Cloning
Quantum Anti-Cloning
2010/10/15
We derive the transformation for the optimal universal quantum anti-cloner which produces two anti-parallel outputs for a single input state. The fidelity is shown to be 2/3 which is same as the measu...
Probabilistic quantum cloning via Greenberger-Horne-Zeilinger states
Probabilistic quantum Greenberger-Horne-Zeilinger states
2010/10/15
We propose a probabilistic quantum cloning scheme using Greenberger-Horne-Zeilinger states,
Bell basis measurements, single-qubit unitary operations and generalized measurements, all of which are wit...