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Coherently driven microcavity-polaritons and the question of superfluidity
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dc.contributor.author | Juggins, R. T. | |
dc.contributor.author | Keeling, J. | |
dc.contributor.author | Szymańska, M. H. | |
dc.date.accessioned | 2018-10-03T11:30:11Z | |
dc.date.available | 2018-10-03T11:30:11Z | |
dc.date.issued | 2018-10-03 | |
dc.identifier | 255653086 | |
dc.identifier | 2b849255-e74f-4440-b52d-6d5f52f77342 | |
dc.identifier | 85054299479 | |
dc.identifier | 000446333400002 | |
dc.identifier.citation | Juggins , R T , Keeling , J & Szymańska , M H 2018 , ' Coherently driven microcavity-polaritons and the question of superfluidity ' , Nature Communications , vol. 9 , 4062 . https://doi.org/10.1038/s41467-018-06436-2 | en |
dc.identifier.issn | 2041-1723 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1806.09581v1 | |
dc.identifier.other | ORCID: /0000-0002-4283-552X/work/49052136 | |
dc.identifier.uri | https://hdl.handle.net/10023/16137 | |
dc.description | M.H.S. acknowledges financial support from EPSRC (Grants no. EP/I028900/2 and no. EP/K003623/2) and J.K. from EPSRC program Hybrid Polaritonics (EP/M025330/1). | en |
dc.description.abstract | Due to their driven-dissipative nature, photonic quantum fluids present new challenges in understanding superfluidity. Some associated effects have been observed, and notably the report of nearly dissipationless flow for coherently driven microcavity-polaritons was taken as a 'smoking gun' for superflow. Here we show that the superfluid response - the difference between responses to longitudinal and transverse forces - is zero for coherently driven polaritons. This is a direct consequence of the gapped excitation spectrum caused by external phase locking. Furthermore, while a normal component exists at finite pump momentum, the remainder forms a rigid state that does not respond to either longitudinal or transverse perturbations. Interestingly, the total response almost vanishes when the real part of the excitation spectrum has a linear dispersion at low frequency, characteristic of equilibrium bosonic superfluids, which was the regime investigated experimentally. These results suggest that the observed suppression of scattering should be interpreted as a sign of this new rigid state and not of a superfluid. | |
dc.format.extent | 8 | |
dc.format.extent | 894771 | |
dc.language.iso | eng | |
dc.relation.ispartof | Nature Communications | en |
dc.subject | QC Physics | en |
dc.subject | T-DAS | en |
dc.subject.lcc | QC | en |
dc.title | Coherently driven microcavity-polaritons and the question of superfluidity | en |
dc.type | Journal article | en |
dc.contributor.sponsor | EPSRC | 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 | 10.1038/s41467-018-06436-2 | |
dc.description.status | Peer reviewed | en |
dc.date.embargoedUntil | 2018-10-02 | |
dc.identifier.grantnumber | EP/M025330/1 | en |
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