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Optimal quantum cloning of orbital angular momentum photon qubits via Hong-Ou-Mandel coalescence
Optimal quantum cloning orbital angular momentum photon via Hong-Ou-Mandel coalescence
2010/11/8
The orbital angular momentum (OAM) of light, associated with a helical structure of the wavefunction, has a great potential for quantum photonics, as it allows attaching a higher dimensional quantum s...
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...
Experimental implementation of optimal phase-covariant quantum cloning machine with a single electron spin in diamond at room temperature
Experimental implementation optimal phase-covariant quantum cloning machine single electron spin diamond at room temperature
2010/10/19
Here we report an experimental realization of optimal phase-covariant quantum cloning machine
with a single electron spin in solid state system at room temperature. The involved three states of two 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...
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...