2009/03/31 by Liliana Arrachea, G. Lozano, Gustavo S. Lozano +1
Engineering · Mathematics · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Condensed matter physics #Hamiltonian (control theory) #Heat current #Mathematics #Non-equilibrium thermodynamics #Pairing #Physics #Quantum #Quantum and electron transport phenomena #Quantum many-body systems #Quantum mechanics #Thermal #Thermal conductivity #Thermodynamics #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.80.014425
published as Phys. Rev. B 80, 014425 (2009) · 10 pages, 5 figures, scheme of the system and comparison with specific heat added. Accepted for publication in Phys. Rev. B
arxiv created 2009/07/07 · openalex publication_date 2009/07/23 · arxiv updated 2015/05/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study heat transport in a one-dimensional inhomogeneous quantum spin-1/2 system. It consists of a finite-size XX spin chain coupled at its ends to semi-infinite XX and XY chains at different temperatures, which play the role of heat and spin reservoirs. After using the Jordan-Wigner transformation we map the original spin Hamiltonian into a fermionic Hamiltonian, which contains normal and pairing terms. We find the expressions for the heat currents and solve the problem with a nonequilibrium Green's-function formalism. We analyze the behavior of the heat currents as functions of the model parameters. When finite magnetic fields are applied at the two reservoirs, the system exhibits rectifying effects in the heat flow.