159 citations · 1.4k across the 75 of their papers we have counts for
9 papers · 2 filters
Collectibility for Mixed Quantum States
Łukasz Rudnicki, Zbigniew Puchała, Paweł Horodecki +1
Bounds analogous to entropic uncertainty relations allow one to design practical tests to detect quantum entanglement by a collective measurement performed on several copies of the…
Constructive entanglement test from triangle inequality
Łukasz Rudnicki, Zbigniew Puchała, Paweł Horodecki +1
We derive a simple lower bound on the geometric measure of entanglement for mixed quantum states in the case of a general multipartite system. The main ingredient of the presented…
Enhancing pseudo-telepathy in the Magic Square game
Łukasz Pawela, Piotr Gawron, Zbigniew Puchała +1
We study the possibility of reversing an action of a quantum channel. Our principal objective is to find a specific channel that reverses as accurately as possible an action of a g…
A model for quantum queue
Piotr Gawron, Dariusz Kurzyk, Zbigniew Puchała
We consider an extension of Discrete Time Markov Chain queueing model to the quantum domain by use of Discrete Time Quantum Markov Chain. We introduce methods for numerical analysi…
Entropic trade-off relations for quantum operations
Wojciech Roga, Zbigniew Puchała, Łukasz Rudnicki +1
Spectral properties of an arbitrary matrix can be characterized by the entropy of its rescaled singular values. Any quantum operation can be described by the associated dynamical m…
Quantum control with spectral constraints
Łukasz Pawela, Zbigniew Puchała
Various constraints concerning control fields can be imposed in the realistic implementations of quantum control systems. One of the most important is the restriction on the freque…
Local controllability of quantum systems
Zbigniew Puchała
We give a criterion that is sufficient for controllability of multipartite quantum systems. We generalize the graph infection criterion to the quantum systems that cannot be descri…
Increasing the security of the ping-pong protocol by using many mutually unbiased bases
Piotr Zawadzki, Zbigniew Puchała, Jarosław Adam Miszczak
In this paper we propose an extended version of the ping-pong protocol and study its security. The proposed protocol incorporates the usage of mutually unbiased bases in the contro…
Restricted numerical shadow and geometry of quantum entanglement
Zbigniew Puchała, Jarosław Adam Miszczak, Piotr Gawron +3
The restricted numerical range of an operator acting on a -dimensional Hilbert space is defined as a set of all possible expectation values of this operator among p…