Search Results for author: Karol Życzkowski

Found 6 papers, 1 papers with code

Symmetries of quantum evolutions

no code implementations13 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

Generating random quantum channels

no code implementations5 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

Optimal allocation of quantum resources

no code implementations29 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

Trade--off relations for operation entropy of complementary quantum channels

no code implementations9 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

On mutually unbiased bases

no code implementations20 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

Random Quantum Operations

3 code implementations15 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

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