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Spin transport in non-Hermitian quantum systems
1Department of Physics, Federal Center for Technological Education of Minas Gerais, 30510-000, Belo Horizonte, MG, Brazil. lslima@cefetmg.br.
Scientific Reports
|July 10, 2023
Summary
This study investigates quantum transport in non-Hermitian systems, finding that non-Hermitian parameters have minimal impact on spin conductivity. The opening of spectral gaps significantly influences longitudinal conductivity in models like the Ising chain.
Area of Science:
- Quantum physics
- Condensed matter physics
- Transport phenomena
Background:
- Non-Hermitian quantum systems exhibit unique transport properties.
- Flat bands in systems like the Lieb lattice and integrability in the Ising chain offer analytical insights into quantum transport.
- Understanding transport in these systems is crucial for developing novel quantum technologies.
Purpose of the Study:
- To analyze quantum transport in non-Hermitian systems, specifically the Lieb lattice and Ising chain.
- To determine the influence of non-Hermitian parameters on spin conductivity.
- To investigate the effect of spectral gap opening on longitudinal conductivity.
Main Methods:
- Analytical calculations of spin conductivity.
- Examination of transport coefficients as a function of non-Hermitian parameters.
- Spectral analysis to understand the impact of energy gaps.
Main Results:
- Non-Hermitian parameters show minimal influence on spin conductivity across analyzed models.
- Transport coefficients are largely unaffected by variations in non-Hermitian parameters.
- The opening of a spectral gap demonstrably impacts longitudinal conductivity.
Conclusions:
- Non-Hermitian parameters play a minor role in spin conductivity for the studied models.
- Spectral gap engineering is a key factor in controlling longitudinal conductivity in non-Hermitian systems.
- The findings provide insights into the fundamental mechanisms governing quantum transport in non-Hermitian environments.
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