2022/07/28 by Chulin Wang, Thomas A. Douglas, Wang, Chulin +3
Engineering · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Quantum Physics (quant-ph) #Superconducting and THz Device Technology #Thermal Radiation and Cooling Technologies
paper · pdf · doi:10.48550/arxiv.2207.14237
openalex publication_date 2022/07/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
An unconventional method of continuous solid-state cryogenic cooling utilizing the electron subband degeneracy of semiconductor heterostructures is proposed in this Letter. An electrostatic heat pump is modeled, which employs subband "expansion" and "compression" to reach sub-dilution refrigeration temperatures with the fundamental limit set by electron-phonon interaction. Using an ultra-wide GaAs quantum well as an example, the cooling power per unit volume is estimated to reach 4.5 \rm mW/cm3 with a hot-side temperature of 300 \rm mK, suitable for applications such as quantum computers or infrared detectors.