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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-8553
DTSTART:20240118T160000Z
DURATION:PT1H0M0S
DTSTAMP:20260413T223208Z
LAST-MODIFIED:20231216T180028Z
LOCATION:5310 Chamberlin
SUMMARY:Inelastic decay from integrability\, R. G. Herb Condensed Matt
 er Seminar\, Amir Burshtein\, Tel Aviv U
DESCRIPTION:Recent experiments in circuit QED setups have demonstrated
  the high probability splitting of single-photons\, a phenomenon rarel
 y observed in nature. This exotic effect is enabled by a high-impedanc
 e Josephson transmission line which increases the effective coupling o
 f the microwave photons to an artificial atom\, and provides a useful 
 tool to probe fundamental phenomena in many-body systems.<br>\nI will 
 discuss a collaboration with the Kuzmin group\, in which we utilized s
 ingle-photon splitting to observe the Schmid-Bulgadaev quantum phase t
 ransition\, whose lack of clear evidence has sparked a recent debate. 
 The experimental system realizes the boundary sine-Gordon model\, whic
 h is known to be integrable and is characterized by purely elastic sca
 ttering of elementary excitations\, that seems at odds with photon spl
 itting. I will show that a nonlinear relation between these excitation
 s and the photons not only allows for inelastic decay of the latter\, 
 but also that integrability provides powerful analytical tools yieldin
 g exact results for the total inelastic decay rate and the spectrum of
  the resulting photons. Our results shed light on the Schmid-Bulgadaev
  transition\, and compare nicely with experimental measurements.<br>\n
 <br>\nhttps://arxiv.org/abs/2308.15542
URL:https://www.physics.wisc.edu/events/?id=8553
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