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Quantum thermometry using the ac Stark shift within the Rabi model
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dc.contributor.author | Higgins, Kieran D. B. | |
dc.contributor.author | Lovett, Brendon William | |
dc.contributor.author | Gauger, Erik M. | |
dc.date.accessioned | 2014-08-20T15:31:02Z | |
dc.date.available | 2014-08-20T15:31:02Z | |
dc.date.issued | 2013-10-07 | |
dc.identifier | 79638608 | |
dc.identifier | 0431462b-eda3-43c4-80b4-878efa139615 | |
dc.identifier | 000325500600010 | |
dc.identifier | 2-s2.0-84885221680 | |
dc.identifier.citation | Higgins , K D B , Lovett , B W & Gauger , E M 2013 , ' Quantum thermometry using the ac Stark shift within the Rabi model ' , Physical Review. B, Condensed matter and materials physics , vol. 88 , no. 15 , 155409 . https://doi.org/10.1103/PhysRevB.88.155409 | en |
dc.identifier.issn | 1098-0121 | |
dc.identifier.other | ORCID: /0000-0001-5142-9585/work/47136588 | |
dc.identifier.uri | https://hdl.handle.net/10023/5200 | |
dc.description | This work was supported by the EPSRC, the National Research Foundation and Ministry of Education, Singapore, and the Royal Society. | en |
dc.description.abstract | A quantum two-level system coupled to a harmonic oscillator represents a ubiquitous physical system. New experiments in circuit QED and nanoelectromechanical systems (NEMS) achieve unprecedented coupling strength at large detuning between qubit and oscillator, thus requiring a theoretical treatment beyond the Jaynes-Cummings model. Here we present a new method for describing the qubit dynamics in this regime, based on an oscillator correlation function expansion of a non-Markovian master equation in the polaron frame. Our technique yields a new numerical method as well as a succinct approximate expression for the qubit dynamics. These expressions are valid in the experimentally interesting regime of strong coupling at low temperature. We obtain a new expression for the ac Stark shift and show that this enables practical and precise qubit thermometry of an oscillator. | |
dc.format.extent | 6 | |
dc.format.extent | 349773 | |
dc.language.iso | eng | |
dc.relation.ispartof | Physical Review. B, Condensed matter and materials physics | en |
dc.subject | State | en |
dc.title | Quantum thermometry using the ac Stark shift within the Rabi model | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. Condensed Matter Physics | en |
dc.identifier.doi | 10.1103/PhysRevB.88.155409 | |
dc.description.status | Peer reviewed | en |
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