no code implementations • 13 Jan 2021 • Giulio Chiribella, Erik Aurell, Karol Życzkowski
Our no-go theorem implies that any time symmetric formulation of quantum theory must either restrict the set of the allowed evolutions, or modify the operational interpretation of quantum states and processes.
Quantum Physics Mathematical Physics Mathematical Physics
no code implementations • 5 Nov 2020 • Ryszard Kukulski, Ion Nechita, Łukasz Pawela, Zbigniew Puchała, Karol Życzkowski
Several techniques of generating random quantum channels, which act on the set of $d$-dimensional quantum states, are investigated.
Quantum Physics
no code implementations • 29 Jun 2020 • Roberto Salazar, Tanmoy Biswas, Jakub Czartowski, Karol Życzkowski, Paweł Horodecki
The optimal allocation of resources is a crucial task for their efficient use in a wide range of practical applications in science and engineering.
Fairness Quantum Physics
no code implementations • 9 Aug 2019 • Jakub Czartowski, Daniel Braun, Karol Życzkowski
The entropy of a quantum operation, defined as the von Neumann entropy of the corresponding Choi-Jamio{\l}kowski state, characterizes the coupling of the principal system with the environment.
Quantum Physics
no code implementations • 20 Apr 2010 • Thomas Durt, Berthold-Georg Englert, Ingemar Bengtsson, Karol Życzkowski
The ultimate hope, not yet fulfilled, is that open questions about mutually unbiased bases can be related to open questions about Hadamard matrices or affine planes, in particular the ...[rest deleted]
Quantum Physics
3 code implementations • 15 Apr 2008 • Wojciech Bruzda, Valerio Cappellini, Hans-Jürgen Sommers, Karol Życzkowski
We define a natural ensemble of trace preserving, completely positive quantum maps and present algorithms to generate them at random.
Exactly Solvable and Integrable Systems Quantum Physics