Quantum Communication 2017-05-05T08:44:53+00:00

Quantum Communication

Quantum communication research focuses on developing a completely new system for high-rate quantum key distribution [QKD] that efficiently solves all the challenges in a single system for the first time.

Cybercrime is growing at an exponential rate. Espionage against public institutions and companies via the internet constitutes the largest cyber-threat worldwide. The security of today’s information infrastructure depends critically on conventional public key encryption schemes. However, since these schemes are based on unproven mathematical complexity assumptions, such that an unexpected algorithmic innovation could immediately compromise security.

A revolutionary solution to the problem is to use the protocol of quantum cryptography, or similarly quantum key distribution. This technique offers secure communication, whose security is guaranteed by the laws of quantum physics instead. The seminal discovery of QKD has triggered enormous interest and several proof-of-principle as well as field implementations have been realized.

The research for Quantum Communication will include focus areas on:

Quantum key distribution

We will implement a field test prototype of quantum key distribution for secure communication in the Copenhagen area, integrated into existing security infrastructure.

 Quantum random number generators

Random number generators based on quantum physical processes as entropy source provide perfect randomness in contrary to deterministic pseudo-random number generators. We will design an integrated, compact and fast quantum random number generator.

 Ultra stable laser sources

With our proposed design we open up for a new generation of precision instruments using a simple molecular platform by combining modern methods from cavity QED, quantum physics and quantum optics.

Microresonator based optical frequency combs

The goal of the project is to develop microcomb generators with high (>50 GHz) mode-spacing in the near-infrared spectral region, with no, or only insignificant, phase and frequency noise added to the source’s noise in the parametric scale.

Team Members

Tobias Gehring
Tobias GehringProject Leader and Key Investigator, DTU
Jan Hald
Jan HaldKey Investigator, DFM
Jan W. Thomsen
Jan W. ThomsenKey Investigator, NBI
Nitin Jain
Nitin JainPostdoc, DTU
Cosmo Lupo
Cosmo LupoResearch Associate, University of York
Jens Engholm Pedersen
Jens Engholm PedersenEngineer, NKT Photonics
Ulrik L. Andersen
Ulrik L. AndersenKey Investigator, DTU
Leif Oxenløwe
Leif OxenløweKey Investigator, DTU
Ruben Grigoryan
Ruben GrigoryanElectronic Engineer, DTU
Arne Kordts
Arne KordtsPhD Student, DTU
Dino Solar Nikolic
Dino Solar NikolicPhD Student, DTU
Aleksander Tchernavksij
Aleksander TchernavksijElectronic Engineer, DTU
John Bowers
John BowersKey Investigator, University of California
Christoph Pacher
Christoph PacherKey Investigator, Austrian Institute of Technology
Christian S. Jacobsen
Christian S. JacobsenPostdoc, DTU
Peter Landrock
Peter LandrockEntrepreneur, Cryptomathic

Project Leader

Tobias Gehring

Assistant Professor at Department of Physics, Technical University of Denmark (DTU).

Key Investigators

Ulrik L. Andersen

Professor at Department of Physics, Technical University of Denmark (DTU).

John Bowers

Professor at Department of Electrical and Computer Engineering, Stanford University

Jan Hald

Key Investigator, DFM