Experimental entanglement distillation of mesoscopic quantum states
نویسندگان
چکیده
Ruifang Dong, Mikael Lassen, 2 Joel Heersink, Christoph Marquardt, Radim Filip, 3 Gerd Leuchs, and Ulrik L. Andersen 2 Institut für Optik, Information und Photonik, Max-Planck Forschungsgruppe, Universität Erlangen-Nürnberg, Günther-Scharowsky-Str. 1, 91058, Erlangen, Germany Department of Physics, Technical University of Denmark, Building 309, 2800 Lyngby, Denmark Department of Optics, Palacký University, 17. listopadu 50, 77200 Olomouc, Czech Republic (Dated: December 3, 2008)
منابع مشابه
Gaussification and entanglement distillation of continuous-variable systems: a unifying picture.
Distillation of entanglement using only Gaussian operations is an important primitive in quantum communication, quantum repeater architectures, and distributed quantum computing. Existing distillation protocols for continuous degrees of freedom are only known to converge to a Gaussian state when measurements yield precisely the vacuum outcome. In sharp contrast, non-Gaussian states can be deter...
متن کاملQuantum entanglement beyond Gaussian criteria.
Most of the attention given to continuous variable systems for quantum information processing has traditionally been focused on Gaussian states. However, non-Gaussianity is an essential requirement for universal quantum computation and entanglement distillation, and can improve the efficiency of other quantum information tasks. Here we report the experimental observation of genuine non-Gaussian...
متن کاملContinuous-variable entanglement distillation and noncommutative central limit theorems
Entanglement distillation transforms weakly entangled noisy states into highly entangled states, a primitive to be used in quantum repeater schemes and other protocols designed for quantum communication and key distribution. In this work, we present a comprehensive framework for continuous-variable entanglement distillation schemes that convert noisy non-Gaussian states into Gaussian ones in ma...
متن کاملua nt - p h / 05 08 17 8 v 2 20 F eb 2 00 6 Experimental purification of coherent states
We propose a scheme for optimal Gaussian purification of coherent states from several imperfect copies. The proposal is experimentally demonstrated for the case of two copies of a coherent state sent through independent noisy channels. Our purification protocol relies on only linear optics and an ancilla vacuum state, rendering this approach an interesting alternative to the more complex protoc...
متن کاملEfficient entanglement distillation without quantum memory
Entanglement distribution between distant parties is an essential component to most quantum communication protocols. Unfortunately, decoherence effects such as phase noise in optical fibres are known to demolish entanglement. Iterative (multistep) entanglement distillation protocols have long been proposed to overcome decoherence, but their probabilistic nature makes them inefficient since the ...
متن کامل