Zobrazeno 1 - 10
of 101
pro vyhledávání: '"Guarneri, Italo"'
Publikováno v:
Phys. Rev. B 102, 045433 (2020)
A basic result about the dynamics of spinless quantum systems is that the Maryland model exhibits dynamical localization in any dimension. Here we implement mathematical spectral theory and numerical experiments to show that this result does not hold
Externí odkaz:
http://arxiv.org/abs/2005.00232
Autor:
Guarneri, Italo
Publikováno v:
Phys. Rev. E 95, 032206 (2017)
The Gross Pitaevski map is a discrete time, split operator version of the Gross Pitaevski dynamics in the circle, for which exponential instability has been recently reported. Here it is studied as a classical dynamical system in its own right. A sys
Externí odkaz:
http://arxiv.org/abs/1611.04730
Autor:
Weiss, Werner, Benenti, Giuliano, Casati, Giulio, Guarneri, Italo, Calarco, Tommaso, Paternostro, Mauro, Montangero, Simone
Publikováno v:
New J. Phys. 18 013021 (2016)
We explore the challenges posed by the violation of Bell-like inequalities by $d$-dimensional systems exposed to imperfect state-preparation and measurement settings. We address, in particular, the limit of high-dimensional systems, naturally arising
Externí odkaz:
http://arxiv.org/abs/1508.00368
Publikováno v:
Phys. Rev. Lett. 113, 174101 (2014)
We consider classical models of the kicked rotor type, with piecewise linear kicking potentials designed so that momentum changes only by multiples of a given constant. Their dynamics display quasi-localization of momentum, or quadratic growth of ene
Externí odkaz:
http://arxiv.org/abs/1410.6325
Publikováno v:
Phys. Rev. E 88, 052919 (2013)
Long-lasting quantum exponential spreading was recently found in a simple but very rich dynamical model, namely, an on-resonance double-kicked rotor model [J. Wang, I. Guarneri, G. Casati, and J. B. Gong, Phys. Rev. Lett. 107, 234104 (2011)]. The und
Externí odkaz:
http://arxiv.org/abs/1308.3527
Publikováno v:
Phys. Rev. Lett. 107, 234104 (2011)
Using a dynamical model relevant to cold-atom experiments, we show that long-lasting exponential spreading of wave packets in momentum space is possible. Numerical results are explained via a pseudo-classical map, both qualitatively and quantitativel
Externí odkaz:
http://arxiv.org/abs/1201.2493
Publikováno v:
Phys. Rev. E 85, 036205 (2012)
Kicked atoms under a constant Stark or gravity field are investigated for experimental setups with cold and ultra cold atoms. The parametric stability of the quantum dynamics is studied using the fidelity. In the case of a quantum resonance, it is sh
Externí odkaz:
http://arxiv.org/abs/1201.1418
We numerically analyze the dynamical generation of quantum entanglement in a system of 2 interacting particles, started in a coherent separable state, for decreasing values of $\hbar$. As $\hbar\to 0$ the entanglement entropy, computed at any finite
Externí odkaz:
http://arxiv.org/abs/1109.0907
Autor:
Guarneri, Italo
Publikováno v:
J. Phys. A: Math. Theor. 44 (2011) 485304
A system of a particle and a harmonic oscillator, which have pure point spectrum if uncoupled, is known to acquire absolutely continuous spectrum when the particle and the oscillator are coupled by a sufficiently strong point interaction. Here the si
Externí odkaz:
http://arxiv.org/abs/1101.0328
Publikováno v:
Phys. Rev. E 80, 035206(R) (2009)
Using a semiclassical ansatz we analytically predict for the fidelity of delta-kicked rotors the occurrence of revivals and the disappearance of intermediate revival peaks arising from the breaking of a symmetry in the initial conditions. A numerical
Externí odkaz:
http://arxiv.org/abs/0907.0610