19 citations · 64 across the 5 of their papers we have counts for
5 papers
Uhlmann Fidelity and Fidelity Susceptibility for Integrable Spin Chains at Finite Temperature: Exact Results
Michał Białończyk, Fernando Javier Gómez-Ruiz, Adolfo del Campo
We derive the exact expression for the Uhlmann fidelity between arbitrary thermal Gibbs states of the quantum XY model in a transverse field with finite system size. Using it, we c…
Locating quantum critical points with Kibble-Zurek quenches
Michał Białończyk, Bogdan Damski
We describe a scheme for finding quantum critical points based on studies of a non-equilibrium susceptibility during finite-rate quenches taking the system from one phase to anothe…
Dynamics of longitudinal magnetization in transverse-field quantum Ising model: from symmetry-breaking gap to Kibble-Zurek mechanism
Michał Białończyk, Bogdan Damski
We show that the symmetry-breaking gap of the quantum Ising model in the transverse field can be extracted from free evolution of the longitudinal magnetization taking place after…
One-half of the Kibble-Zurek quench followed by free evolution
Michał Białończyk, Bogdan Damski
We drive the one-dimensional quantum Ising chain in the transverse field from the paramagnetic phase to the critical point and study its free evolution there. We analyze excitation…
Application of Shemesh theorem to quantum channels
Michał Białończyk, Andrzej Jamiołkowski, Karol Życzkowski
Completely positive maps are useful in modeling the discrete evolution of quantum systems. Spectral properties of operators associated with such maps are relevant for determining t…