509 citations · 3.2k across the 26 of their papers we have counts for
10 papers · 2 filters
Temperature effects on mixed state geometric phase
A. T. Rezakhani, P. Zanardi
Geometric phase of an open quantum system that is interacting with a thermal environment (bath) is studied through some simple examples. The system is considered to be a simple spi…
Ground state overlap and quantum phase transitions
Paolo Zanardi, Nikola Paunković
We present a characterization of quantum phase transitions in terms of the the overlap function between two ground states obtained for two different values of external parameters.…
Coupling bosonic modes with a qubit: entanglement dynamics at zero and finite-temperatures
Emanuele Ciancio, Paolo Zanardi
We consider a system of two iso-spectral bosonic modes coupled with a single two-level systems i.e., a qubit. The dynamics is described by a mode-symmetric two-modes Jaynes-Cumming…
Fidelity optimization for holonomic quantum gates in dissipative environments
Daniele Parodi, Maura Sassetti, Paolo Solinas +2
We analyze the performance of holonomic quantum gates in semi-conductor quantum dots, driven by ultrafast lasers, under the effect of a dissipative environment. In agreement with t…
Decay of Loschmidt Echo Enhanced by Quantum Criticality
H. T. Quan, Z. Song, X. F. Liu +2
We study the transition of a quantum system from a pure state to a mixed one, which is induced by the quantum criticality of the surrounding system coupled to it. To chara…
A General Setting for Geometric Phase of Mixed States Under an Arbitrary Nonunitary Evolution
A. T. Rezakhani, P. Zanardi
The problem of geometric phase for an open quantum system is reinvestigated in a unifying approach. Two of existing methods to define geometric phase, one by Uhlmann's approach and…