Effects of Magnetic Anisotropy on 3-Qubit Antiferromagnetic Thermal Machines
Fuente:
arXiv
Salvato in:
| Autori principali: | , , , , , |
|---|---|
| Natura: | Preprint |
| Pubblicazione: |
2024
|
| Soggetti: | |
| Accesso online: | |
| Tags: |
Aggiungi Tag
Nessun Tag, puoi essere il primo ad aggiungerne!!
|
| _version_ | 1866912047777710080 |
|---|---|
| author | Castorene, Bastian Peña, Francisco J. Norambuena, Ariel Ulloa, Sergio E. Araya, Cristobal Vargas, Patricio |
| author_facet | Castorene, Bastian Peña, Francisco J. Norambuena, Ariel Ulloa, Sergio E. Araya, Cristobal Vargas, Patricio |
| contents | 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 homogeneous magnetic field. We explore the Stirling and Otto cycles and find that easy-axis anisotropy significantly enhances engine efficiency across all cases. At low temperatures, the ring configuration outperforms the chain on both work and efficiency during the Stirling cycle. Additionally, in both topologies, the Stirling cycle achieves Carnot efficiency with finite work at quantum critical points. In contrast, the quasistatic Otto engine also reaches Carnot efficiency at these points but yields no useful work. Notably, the Stirling cycle exhibits all thermal operational regimes engine, refrigerator, heater, and accelerator unlike the quasistatic Otto cycle, which functions only as an engine or refrigerator. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_12339 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Effects of Magnetic Anisotropy on 3-Qubit Antiferromagnetic Thermal Machines Castorene, Bastian Peña, Francisco J. Norambuena, Ariel Ulloa, Sergio E. Araya, Cristobal Vargas, Patricio Statistical Mechanics Quantum Physics 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 homogeneous magnetic field. We explore the Stirling and Otto cycles and find that easy-axis anisotropy significantly enhances engine efficiency across all cases. At low temperatures, the ring configuration outperforms the chain on both work and efficiency during the Stirling cycle. Additionally, in both topologies, the Stirling cycle achieves Carnot efficiency with finite work at quantum critical points. In contrast, the quasistatic Otto engine also reaches Carnot efficiency at these points but yields no useful work. Notably, the Stirling cycle exhibits all thermal operational regimes engine, refrigerator, heater, and accelerator unlike the quasistatic Otto cycle, which functions only as an engine or refrigerator. |
| title | Effects of Magnetic Anisotropy on 3-Qubit Antiferromagnetic Thermal Machines |
| topic | Statistical Mechanics Quantum Physics |
| url | https://arxiv.org/abs/2405.12339 |