51 citations · 191 across the 26 of their papers we have counts for
31 papers
Probing quasiperiodic spectral accessibility with a finite-rate quantum Otto cycle
Shujie Cheng, Lucas C. Céleri, Norton G. de Almeida +2
Quasiperiodic systems combine sharply different spectral and localisation regimes with a dense hierarchy of dynamical time scales. We show that a finite-rate quantum Otto cycle can…
Collective Strong Quantum Mpemba Effect in Accelerated Quantum Detectors
G. D. de Moraes Neto, Richard Q. Matos, Norton G. de Almeida
Collective coupling to the Minkowski vacuum allows uniformly accelerated quantum detectors to exhibit a strong quantum Mpemba effect, in which a state initially farther from equili…
Preparation-controlled relaxation in an overdamped RLC circuit: A pedagogical route to the spectral Mpemba effect
Matheus H. dos Santos, Cler T. Garcez, Jeveson C. da Silva +2
Can a system with more stored energy cool faster than one with less? An overdamped resistor--inductor--capacitor (RLC) circuit offers a classical, experimentally accessible spectra…
Collective thermalization, work reliability, and resource bounds in a population-inverted Dicke Otto engine
Cler T. Garcez, Gabriella G. Damas, Norton G. de Almeida +1
Population inversion and collective relaxation can both enhance the performance of a quantum heat engine, but through distinct mechanisms. We study a quantum Otto engine whose work…
Superradiant Mpemba Relaxation in a Dicke Ladder
Matheus G. H. Santos, Hugo Sanchez, Italo M. de Araújo +3
The Mpemba effect occurs when a state initially farther from stationarity overtakes a closer one during relaxation. We show that this anomalous ordering can coexist with superradia…
Finite-size reliability of homothetic quantum Otto engines
Gabriella G. Damas, Clebson Cruz, Norton G. de Almeida +2
Homothetic quantum Otto engines---where all populated energy gaps are rescaled by a common factor---provide a reference model in which the quasistatic stochastic efficiency is traj…
Collective Mpemba-Type Relaxation in Degenerate Bosonic Modes Coupled to a Common Thermal Reservoir
I. M. de Araújo, H. Sanchez, L. F. Alves da Silva +2
We investigate collective Mpemba-type relaxation in a degenerate family of bosonic modes coupled to a common thermal reservoir. Starting from a fully symmetric M-mode description a…
Visibility-Engineered Multiparameter Sensing in Dispersive Quantum Interferometry: Identifiability, Noise Robustness, and Hardware Emulation
Lucas Ferreira R. de Moura, Daniel Y. Akamatsu, G. D. de Moraes Neto +1
We propose a dispersive interferometric protocol for simultaneously estimating the dimensionless inverse temperature of a thermal two-level ancilla and the dispersive…
Exploring the role of criticality in the quantum Otto cycle fueled by the anisotropic quantum Rabi-Stark model
He-Guang Xu, Jiasen Jin, Norton G. de Almeida +1
Quantum heat machines, encompassing heat engines, refrigerators, heaters, and accelerators, represent the forefront of quantum thermodynamics, offering a novel paradigm for convert…
Entropy production and efficiency enhancement in quantum Otto engines operating at negative temperatures
Aryadine F. de Sousa, Gabriella G. Damas, Norton G. de Almeida
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…
Trapped-ion toolbox to simulate quantum Otto heat engines
Rogério Jorge de Assis, Ciro Micheletti Diniz, Norton Gomes de Almeida +1
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,…
Universal quantum Otto heat machine based on the Dicke model
He-Guang Xu, Jiasen Jin, G. D. M. Neto +1
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…
Optimizing resetting of superconducting qubits
Ciro M. Diniz, Rogerio J. de Assis, Norton G. de Almeida +1
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 pr…
Cooling with fermionic reservoir
Gabriella G. Damas, Rogério J. de Assis, Norton G. de Almeida
Recently, much emphasis has been given to genuinely quantum reservoirs generically called fermionic reservoirs. These reservoirs are characterized by having finite levels, as oppos…
Negative temperature is cool for cooling
Gabriella G. Damas, Rogério J. de Assis, Norton G. de Almeida
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, whic…
Thermodynamics of the Ramsey Zone
Rogério Jorge de Assis, Ciro Micheletti Diniz, Celso Jorge Villas-Bôas +1
We carry out a study on thermodynamics properties as entropy and heat and work fluxes involved in a Ramsey zone, i.e., a mode field inside a low quality factor cavi…
Two-level quantum Otto heat engine operating with unit efficiency far from the quasi-static regime under a squeezed reservoir
Rogério J. de Assis, J. S. Sales, Udson C. Mendes +1
Recent theoretical and experimental studies in quantum heat engines show that, in the quasi-static regime, it is possible to have higher efficiency than the limit imposed by Carnot…
Unambiguous discrimination of nonorthogonal quantum states in cavity QED
R. J. de Assis, J. S. Sales, N. G. de Almeida
We propose an oversimplified scheme to unambiguously discriminate nonorthogonal quantum field states inside high-Q cavities. Our scheme, which is based on positive operator-valued…
Negative response with optical cavity and traveling wave fields
R. J. de Assis, C. J. Villas-Boas, N. G. de Almeida
We present a feasible protocol using traveling wave field to experimentally observe negative response, i.e., to obtain a decrease in the output field intensity when the input field…
Solitons and entanglement in the double sine-Gordon model
A. Alonso Izquierdo, J. Mateos Guilarte, N. G. de Almeida
The bipartite ground state entanglement in a finite linear harmonic chain of particles is numerically investigated. The particles are subjected to an external on-site periodic pote…
Engineering the unitary charge-conjugation operator of quantum field theory for particle-antiparticle using trapped ions and light fields in cavity QED
N. G. de Almeida
We present a method to engineer the unitary charge conjugation operator, as given by quantum field theory, in the highly controlled context of quantum optics, thus allowing one to…
A proposal to implement a quantum delayed choice experiment assisted by a cavity QED
N. G. de Almeida, A. T. Avelar, W. B. Cardoso
We propose a scheme feasible with current technology to implement a quantum delayed-choice experiment in the realm of cavity QED. Our scheme uses two-level atoms interacting on and…
Bohmian trajectories for bipartite entangled states
A. R de Almeida, M. A. de Ponte, W. B. Cardoso +3
We derive Bohm's trajectories from Bell's beables for arbitrary bipartite systems composed by dissipative noninteracting harmonic oscillators at finite temperature. As an applicati…
Decoherence-free evolution of time-dependent superposition states of two-level systems and thermal effects
F. O. Prado, N. G. de Almeida, E. I. Duzzioni +2
In this paper we detail some results advanced in a recent letter [Prado et al., Phys. Rev. Lett. 102 073008 (2009)] showing how to engineer reservoirs for two-level systems at abso…