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Light-matter decoupling and A2 term detection in superconducting circuits

AuthorsGarcía-Ripoll, Juan José ; Peropadre, Borja ; Liberato, S. de
Issue Date3-Mar-2015
PublisherAmerican Physical Society
CitationAPS March Meeting (2015)
AbstractWe study the spontaneous emission of a qubit interacting with a one-dimensional waveguide through a realistic minimal-coupling interaction. We show that the diamagnetic term A2 leads to an effective decoupling of a single qubit from the electromagnetic field. This effect is observable at any range of qubit-photon couplings. For this we study a setup consisting of a transmon that is suspended over a transmission line. Assuming a standard model of qubit-line interaction, we prove that the relative strength of the A2 term is controlled with the qubit-line separation and show that, as a consequence, the spontaneous emission rate of the suspended transmon onto the line can increase with such separation, instead of decreasing.
DescriptionAPS March Meeting 2015, San Antonio, Texas, March 2–6, 2015
Appears in Collections:(CFMAC-IFF) Comunicaciones congresos
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