Remote preparation of continuous-variable qubits using loss-tolerant hybrid entanglement of light

H Le Jeannic,J Raskop,A Cavaillès,J Laurat,K Huang

doi:10.1364/optica.5.001012

Abstract

Transferring quantum information between distant nodes of a network is a key capability. This transfer can be realized via remote state preparation where two parties share entanglement and the sender has full knowledge of the state to be communicated. Here we demonstrate such a process between heterogeneous nodes functioning with different information encodings, i.e., particle-like discrete-variable optical qubits and wave-like continuous-variable ones. Using hybrid entanglement of light as a shared resource, we prepare arbitrary coherent-state superpositions controlled by measurements on the distant discrete-encoded node. The remotely prepared states are fully characterized by quantum state tomography and negative Wigner functions are obtained. This work demonstrates a novel capability to bridge discrete- and continuous-variable platforms.

Highlights

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not
In the context of quantum networks, remote state preparation (RSP) protocols enable the transfer of quantum information from one place to a distant one via entanglement shared between two parties [1,2,3,4]
RSP finds a variety of applications, ranging from longdistance quantum communication to loss-tolerant quantumenhanced metrology [6]

Summary

Introduction

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. In the context of quantum networks, remote state preparation (RSP) protocols enable the transfer of quantum information from one place to a distant one via entanglement shared between two parties [1,2,3,4]. The initial entangled resource is based either on finitedimensional systems, such as single-photon qubits, or on infinitedimensional spaces, such as squeezed states, following thereby the traditional separation between quantum information approaches.

Results

Conclusion