Linear optics schemes for entanglement distribution with realistic single-photon sources


Mikołaj Lasota, Czesław Radzewicz, Konrad Banaszek, Rob Thew


Phys. Rev. A 90, 033836 (2014)

We study the operation of linear optics schemes for entanglement distribution based on nonlocal photon subtraction when input states, produced by imperfect single-photon sources, exhibit both vacuum and multiphoton contributions. Two models for realistic photon statistics with radically different properties of the multiphoton “tail” are considered. The first model assumes occasional emission of double photons and linear attenuation, while the second one is motivated by heralded sources utilizing spontaneous parametric down-conversion.

Revealing Genuine Optical-Path Entanglement


F. Monteiro, V. Caprara Vivoli, T. Guerreiro, A. Martin, J.-D. Bancal, H. Zbinden, R. T. Thew, and N. Sangouard


Phys. Rev. Lett. 114, 170504 (2015)

How can one detect entanglement between multiple optical paths sharing a single photon? We address this question by proposing a scalable protocol, which only uses local measurements where single photon detection is combined with small displacement operations. The resulting entanglement witness does not require postselection, nor assumptions about the photon number in each path. Furthermore, it guarantees that entanglement lies in a subspace with at most one photon per optical path and reveals genuinely multipartite entanglement.

Quantum Technologies in H2020

The on-line version of the document can be browsed here,
a pdf of the full document will be generated following 
this link.

European Physical Society cautions against Horizon 2020 budget cuts


The full IOP Physics World article is available here.

IOP Physics World informs that The European Physical Society (EPS) has hit out at plans to remove €2.7bn from the €80bn budget of Horizon 2020 – the European Union's main research funding programme – and use the money instead to help finance a new European Union economic-stimulus initiative.

Read the full article here.

QIPC projects @ First FET Proactive, Horizon 2020 Framework Programme


Within the H2020 Work Programme 2014-15, the FET Proactive call, Emerging themes and communities, had 3 initiatives: Global Systems Science; Knowing, doing and being: cognition beyond problem solving; and Quantum simulation (Q-SIM). 5 Q-SIM-initiative projects were selected for funding.

In the Work Programme 2014-2015, FET Proactive consists of 3 initiatives under the "Emerging themes and communities" call, and for a fourth one, under the dedicated "Towards exascale high-performance computing" call, implementing part of the HPC strategy elaborated in the context of the HPC Public-Private Partnership by ETP4HPC.

Emerging Themes and Communities

Following a public consultation during 2012-2013, 'Quantum simulation' was one of the three topics that have been selected for inclusion in the 2014-15 work programme.

Rydberg Quantum Simulators workshop

2015-03-11 - 2015-03-13
Registration deadline: 
2015-01-31 (All day)
Aarhus University

Conference description

Random Variation of Detector Efficiency: A Secure Countermeasure against Detector Blinding Attacks for Quantum Key Distribution

2014-08-27 - 2014-11-05

Charles Ci Wen Lim, Nino Walenta, Matthieu Legre, Nicolas Gisin, Hugo Zbinden



In the recent decade, it has been discovered that QKD systems are extremely vulnerable to side-channel attacks. In particular, by exploiting the internal working knowledge of practical detectors, it is possible to bring them to an operating region whereby only certain target detectors are sensitive to detections. Crucially, the adversary can use this loophole to learn everything about the secret key without introducing any error to the quantum channel.

QUTE-EUROPE contribution to FET public consultation


QUTE-EUROPE submitted a position document titled "Quantum Technologies in H2020" to the recently launched FET public consultation.

As many of you probably know, the EC has launched an online consultation to identify game-changing directions for future research in FET related technological domains. The purpose of this consultation is to initiate thinking about future proactive initiatives to be included in the next FET workprogramme for 2016 and 2017.


2013-12-07 - 2014-04-01

Specific challenge: Devices that exploit quantum phenomena such as superposition and entanglement have the potential to enable radically new technologies. Several promising directions are now well known, for instance in quantum computation and simulation, quantum communication, quantum metrology and sensing. However, overcoming basic scientific challenges as well as bridging from the scientific results to concrete engineering technologies has proved difficult.

Information day for the first Call in Quantum simulation FET-Proactive initiative


The EC is organizing the Information day for the first Call in Quantum simulation FET-Proactive initiative for the new Framework program, to be held on the 20th January 2014 in Brussels.

The European Commission is organizing an Information day for the first Call in Quantum simulation FET-Proactive initiative for the new Framework program.

The event will take place in Brussels in the DIAMANT Conference centre (location still to be confirmed) (http://www.diamant.be/index.php?option=com_content&view=article&id=46&Itemid=53&lang=en) on January 20, 2014.

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