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DTSTAMP:20260502T173728Z
SUMMARY:Matter Seminar: Quantized resistance from fractional quantum Hall e
 dge with superconductivity
DESCRIPTION:Quantized resistance from fractional quantum Hall edge with sup
 erconductivity\nIn recent years\, there has been growing experimental inte
 rests in studying quantum Hall edge states in proximity to a superconducto
 r (SC)\; however\, a quantized resistance signature is usually lacking\, d
 ue to the non-universal superconducting couplings and unavoidable disorder
 s. We demonstrate that a novel quantized resistance can be realized for ce
 rtain fractional quantum Hall (FQH) edge states with disordered SC proximi
 ty. The example I will show is the filling 2/3 FQH state\, which is known 
 to have a pair of counter-propagating edge modes. We predict that disorder
 ed SC-couplings can reconstruct the edge modes into an infinite set of sta
 ble phases with quantized electron-to-hole conversion probability\, which 
 gives rise to a quantized downstream resistance in the FQH-SC junction. Th
 is provides a quantized electrical transport signature beyond the quantize
 d Hall resistance. Our results reveal a rich landscape of disorder-stabili
 zed phases in topological edge states with SC proximity.\nBiao Lian is an 
 assistant professor at the Department of Physics\, Princeton University si
 nce 2020. He received his B.Sc. from the Department of Physics\, Tsinghua 
 University in 2012\, and completed Ph.D. from Stanford University in 2017.
  He then worked as a postdoctoral fellow in Princeton Center for Theoretic
 al Science from 2017 to 2020. His research interests are theoretical studi
 es of topological condensed matter physics\, low-dimensional quantum syste
 ms\, and nonequilibrium many-body quantum dynamics.
URL:https://www.imperial.ac.uk/events/206540/matter-seminar-quantized-resis
 tance-from-fractional-quantum-hall-edge-with-superconductivity/
DTSTART;TZID=Europe/London:20260310T140000
DTEND;TZID=Europe/London:20260310T150000
LOCATION:711c\, Huxley Building\, South Kensington Campus\, Imperial Colleg
 e London\, London\, SW7 2AZ\, United Kingdom
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