Highlights for the Virtual Institute of Quantum Communication

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Format: 2017-05-30
Format: 2017-05-30
Format: 2017-05-30

20th Apr 2017

On the 16 March 2016, The U.S.-China Economic and Security Review Commission of the United States Congress held a hearing on China's pursuit of new technologies.


17th Feb 2017
Today, the Intermediate Report from the Quantum Technologies Flagship High-Level expert group has been handed over to the European Commission. The hand-over took place during the Quantum Technologies Flagship conference organised by the Maltese presidency, which saw the participation of high profile scientists and industry representatives, as well as several national programme representatives.

25th Nov 2016

As follow up to the publication of the minutes of the Flagship Berlin workshop, we publish here below the minutes of the High Level Steering Committee meeting, which took place after the workshop.

21st May 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.

5th Apr 2015

Quantum teleportation from a telecom-wavelength photon to a solid-state quantum memory
F. Bussières, C. Clausen, A. Tiranov, B. Korzh, V. B Verma, S.W. Nam, F. Marsili, A. Ferrier, P. Goldner, H. Herrmann, C. Silberhorn, W. Sohler, M. Afzelius, N. Gisin
Nature Photonics 8, 775-778 (2014);
Unconditional quantum teleportation between distant solid-state quantum bits
W. Pfaff, B.J. Hensen, H. Bernien, S.B. van Dam, M.S. Blok, T.H. Taminiau, M.J. Tiggelman, R.N. Schouten, M. Markham, D.J. Twitchen, R. Hanson

5th Apr 2015

A quantum gate between a flying optical photon and a single trapped atom
A. Reiserer, N. Kalb, G. Rempe, S. Ritter
Nature 508, 237-240 (2014);
Nanophotonic quantum phase switch with a single atom
T. G. Tiecke, J. D. Thompson, N. P. de Leon, L. R. Liu, V. Vuletic, M. D. Lukin Nature 508, 241-244 (2014);
Nonlinear π phase shift for single fibre-guided photons interacting with a single resonator-enhanced atom
J. Volz, M. Scheucher, C. Junge, A. Rauschenbeutel
Nature Photonics 8, 965-970 (2014);

5th Apr 2015

R. W. Andrews, R. W. Peterson, T. P. Purdy, K. Cicak, R. W. Simmonds, C. A. Regal, and K. W. Lehnert Nature Physics 10, 321-326 (2014)

5th Apr 2015

Y-L. Tang, H-L. Yin, S-J.Chen, Y. Liu, W-J. Zhang, X. Jiang, L. Zhang, J. Wang, L-X. You, J-Y. Guan, D- X. Yang, Z. Wang, H. Liang, Z. Zhang, N. Zhou, X. Ma, T-Y. Chen, Q. Zhang, and J-W. Pan
Phys. Rev. Lett. 113, 190501 (2014)

Measurement-device–independent quantum key distribution (MDIQKD) represents a valid alternative for quantum cryptography. It requires fewer assumptions for security than standard prepare-and-measure schemes, while its implementation is less demanding than fully device-independent protocols.

12th May 2014

Harnessing nonlinearities strong enough to allow two single photons to interact with one another is not only a fascinating challenge but is central to numerous advanced applications in quantum information science. Currently, all known approaches are extremely challenging although a few have led to experimental realisations with attenuated classical laser light.

22nd Mar 2014

S. Nauerth, F. Moll, M. Rau, C. Fuchs, J. Horwath, S. Frick and H. Weinfurter
Nature Photonics 7, 382–386 (2013)

Quantum Key Distribution (QKD) is the first commercial application in the field of quantum information science, with the first routine applications in government and financial sectors and with successful demonstrations of trusted node networks. Today, the main goal is efficient long-range key distribution via either a network structure called 'quantum repeaters' or via satellite, with a view to enabling global secure communication.

22nd Mar 2014

T. Lunghi, J. Kaniewski, F. Bussières, R. Houlmann, M. Tomamichel, A. Kent, N. Gisin, S. Wehner and H. Zbinden
Physical Review Letters 111, 180504 (2013)

Bit commitment is a fundamental cryptographic primitive in which Bob wishes to commit a secret bit to
Alice. Perfectly secure bit commitment between two mistrustful parties until recently was thought to be
impossible even when the parties exchange quantum messages.

However, Kent recently showed that perfect security is indeed theoretically possible, if Alice and Bob split

22nd Mar 2014

P. Jouguet, S. Kunz-Jaques, A. Leverrier, Ph. Grangier and E. Diamanti
Nature Photonics 7, 378-381 (2013)

Continuous-variable systems represent a valid alternative to QKD systems based on finite-dimensional
encodings. Their major advantage is that they only require standard telecommunication technology, and in
particular, that they do not use photon counters. However, these systems were considered up till now
unsuitable for long-distance communication.

In their work, Jouguet and colleagues overcome all previous limitations and demonstrate for the first time

22nd Mar 2014

B. Fröhlich, J. F. Dynes, M. Lucamarini, A. W. Sharpe, Z. Yuan and A. J. Shields
Nature 501, 69-72 (2013)

QKD guarantees secure communication against unbounded eavesdroppers and represents a mature quantum
technology. However, so far no convincing answer has been given to the question of how to extend the scope
of QKD beyond applications in dedicated high security networks.

In their work, Fröhlich and colleagues show that adopting simple and cost-effective telecommunication
technologies to form a quantum access network can greatly expand the number of users in quantum networks

22nd Mar 2014

S. Takeda, T. Mizuta, M. Fuwa, P. van Loock and A. Furusawa
Nature 500, 315 (2013)

7th Jan 2014

Bit commitment is a fundamental cryptographic primitive in which Bob wishes to commit a secret bit to Alice. Perfectly secure bit commitment between two mistrustful parties is impossible through asynchronous exchange of quantum information.

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