2013/03/31 by Luca Chirolli, Fabio Taddei, Rosario Fazio +1 · 12 citations
Computer Science · Engineering · Physics and Astronomy · #Advancements in Semiconductor Devices and Circuit Design #Astronomical interferometer #Biasing #Condensed matter physics #Conductance #Interferometry #Mach–Zehnder interferometer #Optics #Physics #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum mechanics #Visibility #Voltage #cond-mat.mes-hall #quant-ph
paper · pdf · doi:10.1103/physrevlett.111.036801
published in Physical Review Letters 111(3), 036801 (American Physical Society) · 5 pages, 2 figures
openalex publication_date 2013/07/17 · arxiv created 2013/07/30 · arxiv updated 2013/07/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study Coulomb interactions in the finite bias response of Mach-Zehnder interferometers, which exploit copropagating edge states in the integer quantum Hall effect. Here, interactions are particularly important since the coherent coupling of edge channels is due to a resonant mechanism that is spoiled by inelastic processes. We find that interactions yield a saturation, as a function of bias voltage, of the period-averaged interferometer current, which gives rise to unusual features, such as negative differential conductance, enhancement of the visibility of the current, and nonbounded or even diverging visibility of the differential conductance.