Shot Noise in Mesoscopic Systems: From Single Particles to Quantum Liquids

• DOI: 10.7566/jpsj.90.102001
• Publication Date: 2021-09-27T01:02:24Z
• Authors: Kensuke Kobayashi; Masayuki Hashisaka
• Keywords: Quantum Physics; Condensed Matter - Mesoscale and Nanoscale Physics; Strongly Correlated Electrons (cond-mat.str-el); FOS: Physical sciences; 02 engineering and technology; 01 natural sciences; Condensed Matter - Strongly Correlated Electrons; 0103 physical sciences; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); Quantum Physics (quant-ph); 0210 nano-technology

Shot noise, originating from the discrete nature of electric charge, is generated by scattering processes. Shot-noise measurements have revealed microscopic charge dynamics in various quantum transport phenomena. In particular, beyond the single-particle picture, such measurements have proved to be powerful ways to investigate electron correlation in quantum liquids. Here, we review the recent progress of shot-noise measurements in mesoscopic physics. This review summarizes the basics of shot-noise theory based on the Landauer-B��ttiker formalism, measurement techniques used in previous studies, and several recent experiments demonstrating electron scattering processes. We then discuss three different kinds of quantum liquids, namely those formed by, respectively, the Kondo effect, the fractional quantum Hall effect, and superconductivity. Finally, we discuss current noise within the framework of nonequilibrium statistical physics and review related experiments. We hope that this review will convey the significance of shot-noise measurements to a broad range of researchers in condensed matter physics.<br/>Review paper. 53 pages (43 figures). Open access: https://doi.org/10.7566/JPSJ.90.102001<br/>