Quantum Communication

Report from the workshop on Quantum Technologies and Industry

Summary: 

The report of the workshop on Quantum Technologies and Industry was held in Brussels on 6 May 2015 has been published

A participatory workshop on Quantum Technologies and Industry was held in Brussels on 6 May 2015. The aim was to identify what could be the markets for quantum technologies, and how these could be industrialised. The workshop report (available here) summarises the discussions and the action plan which emerged as a conclusion.

quantum control

Research Type: 
Theory

geometric control

quantum control

control of the schroedinger equation

Leader: 
Mario Sigalotti

Quantum hacking lab

Research Type: 
Experiment

Developing methods for testing security of practical quantum communication systems and countermeasures

Exploring limits of physical security

Avalanche single-photon detectors

Leader: 
Vadim Makarov

Quantum Physics and Information Technology (QPIT)

Research Type: 
Experiment

Continuous Variables

Squeezed Light

Two-Mode Squeezing

Quantum Key Distribution

Quantum Metrology

Quantum Information Processing

Opto-Mechanics

Diamond NV Centers

Leader: 
Ulrik Lund Andersen

Quantum Information and Quantum Optics

Research Type: 
Experiment

quantum communication

qauntum cryptography

Multipartite entanglement

Tests on foundation of quantum theory

 

Leader: 
Mohamed Bourennane

Quantum Optics Lab

Research Type: 
Experiment

Quantum optics

Non-linear optics

Quantum information processing

Entangled photon spectroscopy

 

 

Leader: 
André Stefanov

INRIA SECRET

Research Type: 
Theory
  • Quantum cryptography 
  • Quantum error correction
  • Non-locality and quantum games
  • Foundations
Leader: 
Jean-Pierre Tillich, André Chailloux, Anthony Leverrier

Macroscopic Optomechanics from Displaced Single-Photon Entanglement

Date: 
2015-05-21
Author(s): 

Pavel Sekatski, Markus Aspelmeyer and Nicolas Sangouard

Reference: 

Phys. Rev. Lett. 112, 080502 (2014)

Displaced single-photon entanglement is a simple form of optical entanglement, obtained by sending a photon on a beam splitter and subsequently applying a displacement operation. We show that it can generate, through a momentum transfer in the pulsed regime, an optomechanical entangled state involving macroscopically distinct mechanical components, even if the optomechanical system operates in the singlephoton weak coupling regime. We discuss the experimental feasibility of this approach and show that it might open up a way for testing unconventional decoherence models

Witnessing single-photon entanglement with local homodyne measurements: analytical bounds and robustness to losses

Date: 
2014-10-24
Author(s): 

Melvyn Ho, Olivier Morin, Jean-Daniel Bancal, Nicolas Gisin, Nicolas Sangouard and Julien Laurat

Reference: 

New Journal of Physics 16 103035 (2014)

Single-photon entanglement is one of the primary resources for quantum networks, including quantum repeater architectures. Such entanglement can be revealed with only local homodyne measurements through the entanglement witness presented in Morin et al (2013 Phys. Rev. Lett. 110 130401). Here, we provide an extended analysis of this witness by introducing analytical bounds and by reporting measurements confirming its great robustness with regard to losses.

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