Zobrazeno 1 - 10
of 94
pro vyhledávání: '"Gabriele De Chiara"'
Autor:
Stefano Cusumano, Gabriele De Chiara
Publikováno v:
New Journal of Physics, Vol 26, Iss 2, p 023001 (2024)
Quantum collision models normally consist of a system interacting with a set of ancillary units representing the environment. While these ancillary systems are usually assumed to be either two level systems or harmonic oscillators, in this work we mo
Externí odkaz:
https://doaj.org/article/f3ecc332fd9940c98eeff71b26011439
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p L022017 (2022)
Crossing a quantum critical point in finite time challenges the adiabatic condition due to the closing of the energy gap, which ultimately results in the formation of excitations. Such nonadiabatic excitations are typically deemed detrimental in many
Externí odkaz:
https://doaj.org/article/94d9bfea59f64bdd8a77d0857bdb33a1
Publikováno v:
Physical Review Research, Vol 4, Iss 4, p 043138 (2022)
We investigate several control strategies for the transport of an excitation along a spin chain. We demonstrate that fast high-fidelity transport can be achieved using protocols designed with differentiable programming. Building on this, we then show
Externí odkaz:
https://doaj.org/article/6bf76c40763341f6b2cee3124e04bafe
Autor:
Gabriele De Chiara, Alberto Imparato
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p 023230 (2022)
We present a general quantum fluctuation theorem for the entropy production of an open quantum system coupled to multiple environments, not necessarily at equilibrium. Such a general theorem, when restricted to the weak-coupling and Markovian regime,
Externí odkaz:
https://doaj.org/article/aa164208b36847b79b57be5855e3ccc3
Publikováno v:
New Journal of Physics, Vol 24, Iss 11, p 113053 (2022)
The introduction of the quantum analogue of a Carnot engine based on a bath comprising of particles with a small amount of coherence initiated an active line of research on the harnessing of different quantum resources for the enhancement of thermal
Externí odkaz:
https://doaj.org/article/e297fac4393c410192ac60986b7301a4
Autor:
Nathan M Myers, Francisco J Peña, Oscar Negrete, Patricio Vargas, Gabriele De Chiara, Sebastian Deffner
Publikováno v:
New Journal of Physics, Vol 24, Iss 2, p 025001 (2022)
At low-temperatures a gas of bosons will undergo a phase transition into a quantum state of matter known as a Bose–Einstein condensate (BEC), in which a large fraction of the particles will occupy the ground state simultaneously. Here we explore th
Externí odkaz:
https://doaj.org/article/9ba2bb5c02214ea2bcb2d183adffcafc
Publikováno v:
Physical Review Research, Vol 3, Iss 1, p 013165 (2021)
Local master equations are a widespread tool to model open quantum systems, especially in the context of many-body systems. These equations, however, are believed to lead to thermodynamic anomalies and violation of the laws of thermodynamics. In cont
Externí odkaz:
https://doaj.org/article/0ac59acfc40b4e658cf7698b552094d3
Autor:
Gabriele De Chiara, Mauro Antezza
Publikováno v:
Physical Review Research, Vol 2, Iss 3, p 033315 (2020)
We consider thermal machines powered by locally equilibrium reservoirs that share classical or quantum correlations. The reservoirs are modeled by the so-called collisional model or repeated interactions model. In our framework, two reservoir particl
Externí odkaz:
https://doaj.org/article/cf9e95a5ba98408cb3099e8cf3156962
Publikováno v:
New Journal of Physics, Vol 22, Iss 9, p 093050 (2020)
The fast and faithful preparation of the ground state of quantum systems is a challenging but crucial task for several applications in the realm of quantum-based technologies. Decoherence limits the maximum time-window allowed to an experiment to fai
Externí odkaz:
https://doaj.org/article/1876178cd091498596cf60f881f0fbe9
Autor:
Obinna Abah, Ricardo Puebla, Anthony Kiely, Gabriele De Chiara, Mauro Paternostro, Steve Campbell
Publikováno v:
New Journal of Physics, Vol 21, Iss 10, p 103048 (2019)
We quantitatively assess the energetic cost of several well-known control protocols that achieve a finite time adiabatic dynamics, namely counterdiabatic and local counterdiabatic driving, optimal control, and inverse engineering. By employing a cost
Externí odkaz:
https://doaj.org/article/ba09c9f9e285441fb4ef7005e360bad7