Quantum cloning at the light-atoms interface: copying a coherent light state into two atomic quantum memories
arXiv:quant-ph/0404054 · doi:10.1103/PhysRevLett.93.180501
Abstract
A scheme for the optimal Gaussian cloning of coherent light states at the light-atoms interface is proposed. The distinct feature of this proposal is that the clones are stored in an atomic quantum memory, which is important for applications in quantum communication. The atomic quantum cloning machine requires only a single passage of the light pulse through the atomic ensembles followed by the measurement of a light quadrature and an appropriate feedback, which renders the protocol experimentally feasible. An alternative protocol, where one of the clones is carried by the outgoing light pulse, is discussed in connection with quantum key distribution.
4 pages, 3 figures, RevTeX 4
References in corpus (14)
- Quantum information with continuous variables
- Quantum key distribution using gaussian-modulated coherent states
- Experimental long-lived entanglement of two macroscopic objects
- Quantum communication between atomic ensembles using coherent light
- Quantum Memory for Light
- Universal cloning of continuous quantum variables
- Error correction for continuous quantum variables
- Continuous-variable quantum cryptography is secure against non-gaussian attacks
- Atomic Quantum State Teleportation and Swapping
- Optimal cloning of coherent states with a linear amplifier and beam splitters
- Optical implementation of continuous-variable quantum cloning machines
- Optimal N-to-M Cloning of Quantum Coherent States
- Mapping a quantum state of light onto a long-lived atomic spin state: towards quantum memory
- Unitary Gate Synthesis for Continuous Variable Systems
Cited by in corpus (13)
- Gaussian Quantum Information
- Quantum interface between light and atomic ensembles
- Experimental demonstration of quantum memory for light
- Quantum Cloning Machines and the Applications
- Multimode entanglement of light and atomic ensembles via off-resonant coherent forward scattering
- Hamiltonian Design in Atom-Light Interactions with Rubidium Ensembles: A Quantum Information Toolbox
- Continuous-Variable Telecloning with Phase-Conjugate Inputs
- Continuous-Variable Quantum Cloning of Coherent states with Phase-Conjugate Input Modes Using Linear Optics
- Improving teleportation of continuous variables by local operations
- Enhancing the capacity and performance of collective atomic quantum memory
- Optimal multicopy asymmetric Gaussian cloning of coherent states
- Single-cell atomic quantum memory for light
- Quantum storage and cloning of light states in EIT-like medium