Experimental continuous variable cloning of partial quantum information
arXiv:0805.0262 · doi:10.1103/PhysRevA.78.052312
Abstract
The fidelity of a quantum transformation is strongly linked with the prior partial information of the state to be transformed. We illustrate this interesting point by proposing and demonstrating the superior cloning of coherent states with prior partial information. More specifically, we propose two simple transformations that under the Gaussian assumption optimally clone symmetric Gaussian distributions of coherent states as well as coherent states with known phases. Furthermore, we implement for the first time near-optimal state-dependent cloning schemes relying on simple linear optics and feedforward.
Submitted to PRL
References in corpus (9)
- Universal cloning of continuous quantum variables
- Optimal cloning of coherent states with a linear amplifier and beam splitters
- Experimental Quantum Cloning with Prior Partial Information
- Unconditional quantum cloning of coherent states with linear optics
- Cloning of Gaussian states by linear optics
- Fibre-optics implementation of asymmetric phase-covariant quantum cloner
- Optimal cloning for finite distributions of coherent states
- Implementation of optimal phase-covariant cloning machines
- Phase-covariant cloning of coherent states
Cited by in corpus (6)
- Surpassing the no-cloning limit with a heralded hybrid linear amplifier for coherent states
- Quantum feedback amplification
- Truly noiseless probabilistic amplification
- Asymmetric quantum multicast network coding: asymmetric optimal cloning over quantum networks
- Enhancement of nonclassical properties of two-mode squeezed vacuum state with postselected von Neumann measurement
- Nonclassical resource for continuous variable telecloning with non-Gaussian advantage