We have proposed a protocol for conditional suppression of losses in direct quantum state transmission over a lossy quantum channel. The method works by noiselessly attenuating the input state prior to transmission through a lossy channel followed by noiseless amplification
Nature Physics: Experimental estimation of the dimension of quantum systems
In collaboration with experimental and theoretical quantum physicists from Barcelona and Bristol, we have explored properties of physical systems related to the dimension of their phase space. Experimental observations are usually described using theoretical models that make assumptions about the
How many photons does it take to measure a transmittance? Sometimes less than one.
In collaboration with theoretical quantum physicists from Pavia, Italy, we have studied minimum-energy quantum reading. Here in Quantum Optics Lab Olomouc we have demonstrated some efficient reading protocols using fiber-optics interferometric setup which encodes two quantum bits in which-way degree
Photons Beyond Qubits – Workshop on Quantum Information Processing in Olomouc
When: April, 23-25, 2012 Where: Faculty of Science, Palacký University, 17. listopadu 12, Olomouc, Czech Republic [map] What: Workshop on quantum information processing with single photons and other discrete quantum systems. Specific topics include: Single photon generation and manipulation Working with
Na foton si posvítili vědci z Katedry optiky Přírodovědecké fakulty Univerzity Palackého v Olomouci
Tým vědců kolem doc. Radima Filipa z Katedry optiky PřF UP si znovu posvítil na foton. Nejprve v prestižním americkém časopise Physical Review Letters [1] publikoval nové kritérium neklasických projevů slabých proudů fotonů, po šesti měsících pak toto kritérium v nové
Increasing efficiency of a linear-optical quantum gate using an electronic feed forward
We have successfully used a fast electronic feed forward to increase the success probability of a linear optical implementation of a programmable phase gate from 25% to its theoretical limit of 50% [Phys. Rev. A 85, 012305 (2012)]. The feed
Experimental test of the quantum non-Gaussian character of a heralded single-photon state
We reported on experimental verification of quantum non-Gaussianity of a heralded single photon state with positive Wigner function [Phys. Rev. Lett. 107, 213602 (2011)]. We unambiguously demonstrated that the generated state cannot be expressed as a mixture of Gaussian states.
Hadamard gate for coherent state qubits
Our paper on Hadamard gate for coherent state qubits (Schroedinger cat-like states) has been published in Physical Review A as Rapid Communication [Phys. Rev. A 84, 050301(R) (2011)]. The project was done in cooperation of prof. Ulrik L. Andersen’s group
Talk: Ulrik L. Andersen – Quantum optics with photons, phonons and plasmons
Talk ‘Quantum optics with photons, phonons and plasmons’ will be given by Ulrik L. Andersen from Technical University of Denmark (Lyngby) at Department of Optics, Faculty of Science, Palacky University (Olomouc) on Monday Oct 26, 13:00. Address: 17. listopadu 12,