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On quantum estimation, quantum cloning and finite quantum de Finetti theorems
On quantum estimation quantum cloning finite quantum de Finetti theorems
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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...
Decoherence, Einselection and Classicality of a Macroscopic Quantum Superposition generated by Quantum Cloning
Decoherence Einselection and Classicality Macroscopic Quantum Superposition Quantum Cloning
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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
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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
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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...
Probabilistic quantum cloning via Greenberger-Horne-Zeilinger states
Probabilistic quantum Greenberger-Horne-Zeilinger states
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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...