Iterative Entanglement Distillation: Approaching full Elimination of Decoherence
arXiv:1007.1508 · doi:10.1103/PhysRevLett.105.230502
Abstract
The distribution and processing of quantum entanglement form the basis of quantum communication and quantum computing. The realization of the two is difficult because quantum information inherently has a high susceptibility to decoherence, i.e. to uncontrollable information loss to the environment. For entanglement distribution, a proposed solution to this problem is capable of fully eliminating decoherence; namely iterative entanglement distillation. This approach builds on a large number of distillation steps each of which extracts a number of weakly decohered entangled states from a larger number of strongly decohered states. Here, for the first time, we experimentally demonstrate iterative distillation of entanglement. Already distilled entangled states were further improved in a second distillation step and also made available for subsequent steps.Our experiment displays the realization of the building blocks required for an entanglement distillation scheme that can fully eliminate decoherence.
References in corpus (8)
- Experimental quantum teleportation
- Non-Gaussian entanglement distillation for continuous variables
- Quantifying the non-Gaussian character of a quantum state by quantum relative entropy
- Experimental entanglement distillation of mesoscopic quantum states
- Experimental characterization of frequency dependent squeezed light
- Preparation of distilled and purified continuous variable entangled states
- Experimental demonstration of continuous variable purification of squeezed states
- Multiple copy distillation and purification of phase diffused squeezed states
Cited by in corpus (10)
- Strategies for enhancing quantum entanglement by local photon subtraction
- Gaussification and entanglement distillation of continuous variable systems: a unifying picture
- Strongly entangled light from planar microcavities
- Efficient entanglement distillation without quantum memory
- Photon subtraction from traveling fields - recent experimental demonstrations
- Extended analysis of distillation and purification of squeezed states of light
- Experimental demonstration of optimal probabilistic enhancement of quantum coherence
- Universal, unambiguous concentration and distillation of Bell pairs
- Experimental investigation of heralded Gaussification of phase-randomized coherent states of light
- Simplified scheme for continuous-variable entanglement distillation: multicopy distillation of Gaussian entanglement without heralding Gaussian measurements