2014/06/18 by David Oehri, D. Oehri, A. V. Lebedev +5 · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Asymmetry #Charge (physics) #Conductor #Coupling (piping) #Detector #Geometry #Materials science #Mathematics #Mechanical and Optical Resonators #Mesoscopic physics #Optics #Physics #Point particle #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Quantum point contact #Statistical physics #Wave packet #Weak measurement #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.90.075312
published as Phys. Rev. B 90, 075312 (2014)
arxiv created 2014/06/18 · openalex publication_date 2014/08/28 · arxiv updated 2015/06/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the charge dynamics of a quantum dot as measured by a nearby quantum point contact probing the dot via individual single-particle wave packets. We contrast the two limiting cases of weak and strong system-detector coupling exerting vanishing and strong backaction on the system and analyze the resulting differences in the charge-charge correlator. Extending the study to multiple projective measurements modeling a continuous strong measurement, we identify a transition from a charge dynamics dominated by the system's properties to a universal dynamics governed by the measurement.