Zobrazeno 1 - 10
of 86
pro vyhledávání: '"Almeida, Norton"'
Quantum heat machines, encompassing heat engines, refrigerators, heaters, and accelerators, represent the forefront of quantum thermodynamics, offering a novel paradigm for converting heat energy into useful mechanical work. Leveraging quantum mechan
Externí odkaz:
http://arxiv.org/abs/2407.09027
Cyclic classical and quantum thermal machines show higher efficiency when the strokes are carried out quasi-statically. Recent theoretical and experimental work on figures of merit for thermal machines show that they have an advantage when operating
Externí odkaz:
http://arxiv.org/abs/2404.02385
Autor:
de Assis, Rogério Jorge, Diniz, Ciro Micheletti, de Almeida, Norton Gomes, Villas-Bôas, Celso Jorge
We present a scheme that utilizes an ion confined within a bi-dimensional trap to simulate a quantum Otto heat engine whose working substance is a two-level system. In this scheme, the electronic component of the ion (the two-level system) can intera
Externí odkaz:
http://arxiv.org/abs/2402.06979
Publikováno v:
Phys. Rev. E 108, 054131 (2023)
In this work, we analyze an Otto-type cycle operating with a working substance composed of a quantum harmonic oscillator (QHO). Unlike other studies in which the work extraction is done by varying the frequency of the QHO and letting it thermalize wi
Externí odkaz:
http://arxiv.org/abs/2311.13999
In this paper we study a quantum Otto thermal machine where the working substance is composed of N identical qubits coupled to a single mode of a bosonic field, where the atoms and the field interact with a reservoir, as described by the so-called op
Externí odkaz:
http://arxiv.org/abs/2308.06664
Publikováno v:
Phys. Rev. A 108, 052605 (2023)
Many quantum algorithms demand a large number of repetitions to obtain reliable statistical results. Thus, at each repetition it is necessary to reset the qubits efficiently and precisely in the shortest possible time, so that quantum computers actua
Externí odkaz:
http://arxiv.org/abs/2304.00684
Recently, much emphasis has been given to genuinely quantum reservoirs generically called fermionic reservoirs. These reservoirs are characterized by having finite levels, as opposed to bosonic reservoirs, which have infinite levels that can be popul
Externí odkaz:
http://arxiv.org/abs/2207.08862
In this work, we study an autonomous refrigerator composed of three qubits [Phys. Rev. Lett. 105, 130401 (2010)] operating with one of the reservoirs at negative temperatures, which has the purpose of cooling one of the qubits. We find the values of
Externí odkaz:
http://arxiv.org/abs/2204.09479
Autor:
de Assis, Rogério Jorge, Diniz, Ciro Micheletti, Villas-Bôas, Celso Jorge, de Almeida, Norton Gomes
We carry out a study on thermodynamics properties as entropy and heat $J_{Q}$ and work $J_{W}$ fluxes involved in a Ramsey zone, i.e., a mode field inside a low quality factor cavity that behaves classically and promotes rotations on atomic states. F
Externí odkaz:
http://arxiv.org/abs/2203.17171
We analyze the new redefinitions of heat Q and work W recently presented in [arXiv: 1912.01939; arXiv:1912.01983v5] in the quantum thermodynamics domain. According to these redefinitions, heat must be associated with the variation of entropy, while w
Externí odkaz:
http://arxiv.org/abs/2107.03369