Towards detecting traces of non-contact quantum friction in the corrections of the accumulated geometric phase

MB Farías, FC Lombardo, A Soba, PI Villar… - npj Quantum …, 2020 - nature.com
The geometric phase can be used as a fruitful venue of investigation to infer features of the
quantum systems. Its application can reach new theoretical frontiers and imply innovative …

Geometric phase with nonunitary evolution in the presence of a quantum critical bath

FM Cucchietti, JF Zhang, FC Lombardo, PI Villar… - Physical review …, 2010 - APS
Geometric phases, arising from cyclic evolutions in a curved parameter space, appear in a
wealth of physical settings. Recently, and largely motivated by the need of an experimentally …

Geometric phase in a dissipative Jaynes-Cummings model: Theoretical explanation for resonance robustness

L Viotti, FC Lombardo, PI Villar - Physical Review A, 2022 - APS
We follow a generalized kinematic approach to compute the geometric phases acquired in
both unitary and dissipative Jaynes-Cummings models, which provide a fully quantum …

Nonunitary geometric phases: A qubit coupled to an environment with random noise

FC Lombardo, PI Villar - Physical Review A—Atomic, Molecular, and Optical …, 2013 - APS
We describe the decoherence process induced on a two-level quantum system in direct
interaction with a nonequilibrium environment. The nonequilibrium feature is represented by …

Quantumness and memory of one qubit in a dissipative cavity under classical control

H Gholipour, A Mortezapour, F Nosrati, RL Franco - Annals of Physics, 2020 - Elsevier
Hybrid quantum–classical systems constitute a promising architecture for useful control
strategies of quantum systems by means of a classical device. Here we provide a …

Correction to the geometric phase by structured environments: The onset of non-Markovian effects

FC Lombardo, PI Villar - Physical Review A, 2015 - APS
We study the geometric phase of a two-level system under the presence of a structured
environment, particularly analyzing its correction with the ohmicity parameter s and the onset …

Environmentally induced effects on a bipartite two-level system: Geometric phase and entanglement properties

FC Lombardo, PI Villar - Physical Review A—Atomic, Molecular, and Optical …, 2010 - APS
We calculate the geometric phase of a bipartite two-level system coupled to an external
environment. We analyze the reduced density matrix for an arbitrary initial state of the …

Non-Markovian effect on the geometric phase of a dissipative qubit

JJ Chen, JH An, QJ Tong, HG Luo, CH Oh - Physical Review A—Atomic …, 2010 - APS
We studied the geometric phase of a two-level atom coupled to an environment with
Lorentzian spectral density. The non-Markovian effect on the geometric phase is explored …

Detectable signature of quantum friction on a sliding particle in vacuum

FC Lombardo, RS Decca, L Viotti… - Advanced Quantum …, 2021 - Wiley Online Library
Spatially separated bodies in a relative motion through vacuum experience a tiny friction
force known as quantum friction (QF). This force has so far eluded experimental detection …

Corrections to the Berry phase in a solid-state qubit due to low-frequency noise

FC Lombardo, PI Villar - Physical Review A, 2014 - APS
We present a quantum open-system approach to analyze the nonunitary dynamics of a
superconducting qubit when it evolves under the influence of external noise. We consider …