40 citations · 77 across the 6 of their papers we have counts for
7 papers
Separability gap and large deviation entanglement criterion
Jakub Czartowski, Konrad Szymański, Bartłomiej Gardas +2
For a given Hamiltonian on a multipartite quantum system, one is interested in finding the energy of its ground state. In the separability approximation, arising as a nat…
Geometric and algebraic origins of additive uncertainty relations
Konrad Szymański, Karol Życzkowski
Constructive techniques to establish state-independent uncertainty relations for the sum of variances of arbitrary two observables are presented. We investigate the range of simult…
Convex set of quantum states with positive partial transpose analysed by hit and run algorithm
Konrad Szymański, Benoît Collins, Tomasz Szarek +1
The convex set of quantum states of a composite system with positive partial transpose is analysed. A version of the hit and run algorithm is used to generate a sequen…
Efficient polarization of high-angular-momentum systems
Simon M. Rochester, Konrad Szymański, Mark Raizen +3
We propose methods of optical pumping that are applicable to open, high-angular-momentum transitions in atoms and molecules, for which conventional optical pumping would lead to si…
Classification of joint numerical ranges of three hermitian matrices of size three
Konrad Szymański, Stephan Weis, Karol Życzkowski
The joint numerical range of three hermitian -by- matrices is a convex and compact subset in . Generically we find that is a thr…
Calibration of photomultipliers gain used in the J-PET detector
T. Bednarski, E. Czerwiński, P. Moskal +27
Photomultipliers are commonly used in commercial PET scanner as devices which convert light produced in scintillator by gamma quanta from positron-electron annihilation into electr…
Simulations of gamma quanta scattering in a single module of the J-PET detector
K. Szymański, P. Moskal, T. Bednarski +27
This article describes simulations of scattering of annihilation gamma quanta in a strip of plastic scintillator. Such strips constitute basic detection modules in a newly proposed…