Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Magazzù, L."'
Publikováno v:
Phys. Rev. B 110, 085419 (2024)
We apply the Nakajima-Zwanzig approach to open quantum systems to study steady-state transport across generic multi-level junctions coupled to bosonic or fermionic reservoirs. The method allows for a unified diagrammatic formulation in Liouville spac
Externí odkaz:
http://arxiv.org/abs/2403.06923
Heat transport in the quantum Rabi model at weak interaction with the heat baths is controlled by the qubit-oscillator coupling. Universality of the linear conductance versus the temperature is found for $T\lesssim T_K$, with $T_K$ a coupling-depende
Externí odkaz:
http://arxiv.org/abs/2403.06909
Autor:
Magazzù, L., Grifoni, M.
Publikováno v:
Phys. Rev. B 105, 125417 (2022)
We present a nonperturbative and formally exact approach for the charge transport in interacting nanojunctions based on a real time path integral formulation of the reduced system dynamics. An expansion of the influence functional in terms of the num
Externí odkaz:
http://arxiv.org/abs/2104.14497
Publikováno v:
Phys. Rev. A 104, 053711 (2021)
We present theoretical transmission spectra of a strongly driven, damped, flux qubit coupled to a dissipative resonator in the ultrastrong coupling regime. Such a qubit-oscillator system, described within a dissipative Rabi model, constitutes the bui
Externí odkaz:
http://arxiv.org/abs/2104.14490
Akademický článek
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Publikováno v:
Phys. Rev. E 98, 022111 (2018)
As a paradigmatic model of open quantum system, the spin-boson model is widely used in theoretical and experimental investigations. Beyond the weak coupling limit, the spin dynamics can be described by a time-nonlocal generalized master equation with
Externí odkaz:
http://arxiv.org/abs/1804.08764
Publikováno v:
Phys. Scr. 93, 064001 (2018)
A protocol is proposed to generate Bell states in two non-directly interacting qubits by means of repeated measurements of the state of a central ancilla connected to both qubits. An optimal measurement rate is found that minimizes the time to stably
Externí odkaz:
http://arxiv.org/abs/1802.04839
Publikováno v:
New J. Phys. 20, 033001 (2018)
We study the quantum Brownian motion of a harmonic oscillator undergoing a sequence of generalized position measurements. Our exact analytical results capture the interplay of the measurement backaction and dissipation. Here we demonstrate that no fr
Externí odkaz:
http://arxiv.org/abs/1710.10209
Autor:
Magazzù, L., Forn-Díaz, P., Belyansky, R., Orgiazzi, J. -L., Yurtalan, M. A., Otto, M. R., Lupascu, A., Wilson, C. M., Grifoni, M.
Publikováno v:
Nat. Commun. 9, 1403 (2018)
Quantum two-level systems interacting with the surroundings are ubiquitous in nature. The interaction suppresses quantum coherence and forces the system towards a steady state. Such dissipative processes are captured by the paradigmatic spin-boson mo
Externí odkaz:
http://arxiv.org/abs/1709.01157
Publikováno v:
Phys. Rev. B 91, 235412 (2015)
Normally, quantum fluctuations enhance the escape from metastable states in the presence of dissipation. Here we show that dissipation can enhance the stability of a quantum metastable system, consisting of a particle moving in a strongly asymmetric
Externí odkaz:
http://arxiv.org/abs/1503.03043