Author

Piotr Ćwikliński

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Preprint Sep 2026

Asymmetric quantum cloning on orthogonal orbits and four-mode fermionic states

In this work, we study asymmetric $(1\to2)$ quantum cloning for pure states belonging to orbits generated by the orthogonal group. For every dimension $(d\geq3)$, we determine the full region of achievable pairs of average single-copy fidelities. Using orthogonal covariance and the Brauer algebra, we reduce the optimiz...

Piotr Ćwikliński, M. Studziński · 0 citations

Preprint Aug 2026

Limitations on Joint Coherence Transfer in Quantum Thermodynamics

Coherences between different energy levels are strongly constrained by thermodynamics. Here we ask a related question: if several coherence transfers can be optimized separately, can they also be optimized simultaneously by the same thermodynamic process? We show that this is in general a compatibility problem. Using a...

Piotr Ćwikliński, M. Studziński · 0 citations