24 citations · 111 across the 14 of their papers we have counts for
14 papers
On the structure of mirrored operators obtained from optimal entanglement witnesses
Anindita Bera, Joonwoo Bae, Beatrix C. Hiesmayr +1
Entanglement witnesses (EWs) are a versatile tool in the verification of entangled states. The framework of mirrored EW doubles the power of a given EW by introducing its twin -- a…
Generalizing Choi map in beyond circulant scenario
Anindita Bera, Giovanni Scala, Gniewomir Sarbicki +1
We present a generalization of the family of linear positive maps in proposed thirty years ago by Cho et al. (Linear Algebra Appl. , 213 (1992)) as a generalizatio…
On the classicality of quantum dephasing processes
Davide Lonigro, Dariusz Chruściński
We analyze the multitime statistics associated with pure dephasing systems repeatedly probed with sharp measurements, and search for measurement protocols whose statistics satisfie…
On Markovianity and classicality in multilevel spin-boson models
Dariusz Chruściński, Samaneh Hesabi, Davide Lonigro
We provide a detailed discussion about the unitary and reduced evolution induced by family of Hamiltonian models describing a multilevel system, with a ground state and a possibly…
Time inhomogeneous quantum dynamical maps
Dariusz Chruściński
We discuss a wide class of time inhomogeneous quantum evolution which is represented by two-parameter family of completely positive trace-preserving maps. These dynamical maps are…
Dynamical maps beyond Markovian regime
Dariusz Chruściński
Quantum dynamical maps provide suitable mathematical representation of quantum evolutions. It is the very notion of complete positivity which provides a proper mathematical represe…
A class of optimal positive maps in
Anindita Bera, Gniewomir Sarbicki, Dariusz Chruściński
It is proven that a certain class of positive maps in the matrix algebra consists of optimal maps, i.e. maps from which one cannot subtract any completely positive map withou…
Strongly coupled quantum Otto cycle with single qubit bath
Sagnik Chakraborty, Arpan Das, Dariusz Chruściński
We discuss a model of a closed quantum evolution of two-qubits where the joint Hamiltonian is so chosen that one of the qubits acts as a bath and thermalize the other qubit which i…
Excitation-damping quantum channels
Davide Lonigro, Dariusz Chruściński
We study a class of quantum channels describing a quantum system, split into the direct sum of an excited and a ground sector, undergoing a one-way transfer of population from the…
Memory effects displayed in the evolution of continuous variable system
Samaneh Hesabi, Anindita Bera, Dariusz Chruściński
We analyze non-Markovian memory effects displayed by the quantum Brownian motion modelled as quantum harmonic oscillators coupled to a bath consisting of harmonic oscillators. We s…
Bounding the Frobenius norm of a q-deformed commutator
Dariusz Chruściński, Gen Kimura, Hiromichi Ohno +1
For two complex matrices and , we define the -deformed commutator as for a real parameter . In this paper, we investigate a gen…
Quantum regression in dephasing phenomena
Davide Lonigro, Dariusz Chruściński
We investigate the validity of quantum regression for a family of quantum Hamiltonians on a multipartite system leading to phase-damping reduced dynamics. After finding necessary a…
Quantum regression beyond the Born-Markov approximation for generalized spin-boson models
Davide Lonigro, Dariusz Chruściński
The quantum regression formula for an open quantum system consists in an infinite hierarchy of conditions for its multi-time correlation functions, thus requiring full access to th…
A class of Bell diagonal entanglement witnesses in : optimization and the spanning property
Anindita Bera, Filip A. Wudarski, Gniewomir Sarbicki +1
Two classes of Bell diagonal indecomposable entanglement witnesses in are considered. Within the first class, we find a generalization of the we…