Publications (13)
Shaping a single photon without interacting with it
Denis Sych, Valentin Averchenko, Gerd Leuchs
Complete control over the properties of light up to the level of single photons is an invaluable tool for quantum information science and fundamental studies of light-matter intera…
Atmospheric Channel Characteristics for Quantum Communication with Continuous Polarization Variables
Bettina Heim, Dominique Elser, Tim Bartley +5
We investigate the properties of an atmospheric channel for free space quantum communication with continuous polarization variables. In our prepare-and-measure setup, coherent pola…
Coherent State Quantum Key Distribution with Multi Letter Phase-Shift Keying
Denis Sych, Gerd Leuchs
We present a protocol for quantum key distribution using discrete modulation of coherent states of light. Information is encoded in the variable phase of coherent states which can…
Quantum noise extraction from the interference of laser pulses in optical quantum random number generator
Roman Shakhovoy, Denis Sych, Violetta Sharoglazova +3
We propose a method for quantum noise extraction from the interference of laser pulses with random phase. Our technique is based on the calculation of a parameter, which we called…
Optimal receiver for binary coherent signals
Denis Sych, Gerd Leuchs
One of the most fascinating aspects of quantum mechanics is the principle impossibility of deterministic errorless discrimination of nonorthogonal signals, such as coherent states.…
Demonstration of Coherent State Discrimination Using a Displacement Controlled Photon Number Resolving Detector
Christoffer Wittmann, Ulrik L. Andersen, Masahiro Takeoka +2
We experimentally demonstrate a new measurement scheme for the discrimination of two coherent states. The measurement scheme is based on a displacement operation followed by a phot…