8 citations · 20 across the 16 of their papers we have counts for
19 papers
Sorted Mutability as an Entropic Functional: Theory and Two Applications
Michel Aguilera, Eugenio E. Vogel, Francisco J. Peña +2
We investigate sorted mutability, , as an information-based quantity with an explicit entropic character. We show that is directly proportional to the diversity of a dat…
Quantum Statistical Thermal Engine at the BCS-BEC crossover
Santiago Henríquez Lira, Felipe Isaule, Martín HvE Groves +3
We propose a quantum heat engine based on a two-component Fermi gas with s-wave contact interaction, operating across the BCS-BEC crossover. The work is extracted from the statisti…
Equilibrium Thermodynamics of Non-Hermitian Dirac Fermions: Caloric and Magnetic Responses
Francisco J. Peña, Bastian Castorene, Juan Pablo Esparza +2
We establish scaling relations governing the equilibrium thermodynamics of real-spectrum non-Hermitian Dirac fermions in a magnetic field. Assuming thermalization with respect to t…
Thermodynamic signatures of spectral compression in weakly non-Hermitian Dirac fermions
Juan Pablo Esparza, Francisco J. Peña, Patricio Vargas +1
Non-Hermitian band descriptions capture how loss, gain, and environmental coupling reshape quantum matter, yet most experimental probes remain wave based or dynamical. Here we deve…
Bosonic Working Media in a Frustrated Rhombi Chain: Otto and Stirling Cycles from Flat Bands, Caging, and Flux Control
Francisco J. Peña, Rafael García-Zamora, Gabriele De Chiara +5
We demonstrate that flat-band engineering provides a direct route to control and optimize the thermodynamic performance of quantum heat engines. We consider noninteracting bosons o…
Caloric Phenomena and Stirling-Cycle Performance in Heisenberg- Kitaev Magnon Systems
Bastian Castorene, Martin HvE Groves, Francisco J. Peña +5
We investigate the Stirling-cycle performance of a Heisenberg--Kitaev magnonic medium with Dzyaloshinskii--Moriya (DM) interactions. Using linear spin-wave theory, we show the DM i…
Thermal Hofstadter Butterflies
Natalia Cortés, Bastian Castorene, Francisco J. Peña +3
Fractal electronic spectra arising from the competition between lattice periodicity and magnetic flux are a fundamental hallmark of two-dimensional quantum systems. While the spect…
Exact Combinatorial Density of States for the Critical 1D Ising Model
Bastian Castorene, Francisco J. Peña, Martin HvE Groves +1
This work presents an exact microcanonical combinatorial analysis of the one-dimensional antiferromagnetic Ising model. At the primary ground-state level crossing , degenera…
Fundamental Work Scaling and Non-Extensivity in Critical Engines
Bastian Castorene, Martin HvE Groves, Francisco J. Peña +2
We present a general analytical framework for critical two-isothermal engines that emerge operationally from quasi-static quantum Stirling cycles across ground-state level crossing…
Reaching maximum efficiency in quantum Stirling engines using multilayer graphene
Bastian Castorene, Francisco J. Peña, Eric Suárez Morell +4
In this work, quantum Stirling engines based on monolayer, AB-stacked bilayer, and ABC-stacked trilayer graphene under perpendicular magnetic fields are analyzed. Performance maps…
Entropy-Seebeck ratio as a tool for elementary charge determination
Francisco J. Peña, Cesar Nuñez, Bastian Castorene +3
In this work, we investigate the relationship between the Seebeck coefficient , and the differential entropy per particle (DEP, ), as a tool for characterizing charge carri…
Quantum Level-Crossing Induced by Anisotropy in Spin-1 Heisenberg Dimers: Applications to Quantum Stirling Engines
Bastian Castorene, Vinicius Gomez de Paula, Francisco J. Peña +3
This work explores the thermodynamic performance of a quantum Stirling heat engine implemented with an anisotropic spin-1 Heisenberg dimer as the working medium. Using the Hamilton…
Entropy alternatives for equilibrium and out of equilibrium systems
Eugenio E. Vogel, Francisco J. Peña, G. Saravia +1
We introduce a novel entropy-related function, \textit{non-repeatability}, designed to capture dynamical behaviors in complex systems. Its normalized form, \textit{mutability}, has…
Entropy, entanglement and susceptibility of three qubits near quantum criticality
Bastian Castorene, Francisco J. Peña, Ariel Norambuena +3
This work investigates a system of three entangled qubits within the XXX model, subjected to an external magnetic field in the -direction and incorporating an anisotropy term al…
Magnetocaloric effect for a -clock type system
Michel Aguilera, Sergio Pino-Alarcón, Francisco J. Peña +3
In this work, we study the magnetocaloric effect (MCE) in a working substance corresponding to a square lattice of spins with possible orientations, known as the ``-state cl…
Effects of Magnetic Anisotropy on 3-Qubit Antiferromagnetic Thermal Machines
Bastian Castorene, Francisco J. Peña, Ariel Norambuena +3
This study investigates the anisotropic effects on a system of three qubits with chain and ring topology, described by the antiferromagnetic Heisenberg XXX model subjected to a hom…
Magnonic Thermal Machines
N. Vidal-Silva, Francisco J. Peña, Roberto E. Troncoso +1
We propose a magnon-based thermal machine in two-dimensional (2D) magnetic insulators. The thermodynamical cycles are engineered by exposing a magnon spin system to thermal baths a…
Teaching labs for blind students: equipment to measure the thermal expansion coefficient of a metal. A case of study
O. Negrete, A. Lisboa, F. J. Peña +2
We design a Teaching laboratory experience for blind students, to measure the linear thermal expansion coefficient of an object. We use an open-source electronic prototyping platfo…
Control of magnetism in bilayer CrI by an external electric field
E. Suarez Morell, Andrea León, R. Hiroki Miwa +1
Recently intrinsic ferromagnetism in two-dimensional(2D) van der Waals materials was discovered [1, 2, 3]. A monolayer of Chromiun triiodide(CrI3) is ferromagnetic while a bilayer…