10 papers
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…
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, 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…
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…