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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:1
UID:UW-Physics-Event-5079
DTSTART:20190509T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260415T080546Z
LAST-MODIFIED:20190507T144508Z
LOCATION:5310 Chamberlin 
SUMMARY:Quantum piezoacoustics: From low-dimensional electrons to qubi
 ts\, R. G. Herb Condensed Matter Seminar\, Johannes Pollanen\, Michiga
 n State University
DESCRIPTION:Our research group is working on creating and discovering 
 electronic quantum states of matter in low-dimensional electron system
 s and controlling tailor-made quantum circuits.
\n
\nI will discuss ou
 r work developing hybrid piezoacoustic devices for coupling high frequ
 ency microwaves to two-dimensional electron systems. In particular I w
 ill highlight our recent results demonstrating in situ gate-tunable ac
 oustoelectric transport in exfoliated monolayer graphene by measuring 
 the voltage created as high-frequency surface acoustic waves dynamical
 ly drive charge carriers in the graphene. We employ a flip-chip device
  configuration to conduct these acoustoelectric measurements while sim
 ultaneously controlling the graphene carrier density with a metal-oxid
 e back-gate.
\n
\nI will also describe our efforts to couple this hybr
 id piezoacoustic devices to superconducting circuit based quantum bits
  and to a unique low-dimensional electron system formed by trapping an
  ensemble of electrons in vacuum above the free surface of superfluid 
 helium.
\n
URL:https://www.physics.wisc.edu/events/?id=5079
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