Laser cooling of high temperature superconductors
<p>In this dissertation, we theoretically demonstrate laser light induced control and cooling over the order parameter of superconducting cuprates. We predict a non-equilibrium state with enhanced robustness against thermal fluctuations when pumped with coherent pulses. This might ultimately i...
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| Other Authors: | |
| Format: | Thesis |
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2019
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| _version_ | 1817932060475523072 |
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| author | Dietrich, A |
| author2 | Jaksch, D |
| author_facet | Jaksch, D Dietrich, A |
| author_sort | Dietrich, A |
| collection | OXFORD |
| description | <p>In this dissertation, we theoretically demonstrate laser light induced control and cooling over the order parameter of superconducting cuprates. We predict a non-equilibrium state with enhanced robustness against thermal fluctuations when pumped with coherent pulses. This might ultimately increase the critical temperature of the cuprate. </p> <p>In particular, we propose a parametric cooling scheme for a bilayer cuprate modelled phenomenologically as a stack of long intrinsic Josephson junctions. We identify a parameter regime, which according to the switching current distribution allows a reduction of the effective system temperature by approximately 25%. This cooling scheme suppresses the thermal excitation of Josephson vortices. This might lead to an indirect mechanism for controlling topological excitations in the phase of the superconducting order parameter. </p> <p>We further find that the strong driving of the cuprates can lead to parametric instabilities. To investigate the effect strong driving can have on the dissipative dynamics, we derive a FloquetMarkov master equation. We find that strong driving is a measure for probing the bath spectral density of otherwise inaccessible condensed matter systems.</p> |
| first_indexed | 2024-03-06T19:14:32Z |
| format | Thesis |
| id | oxford-uuid:17e39d42-d8c8-452c-bc1b-d8507e3876c2 |
| institution | University of Oxford |
| last_indexed | 2024-12-09T03:31:55Z |
| publishDate | 2019 |
| record_format | dspace |
| spelling | oxford-uuid:17e39d42-d8c8-452c-bc1b-d8507e3876c22024-12-01T15:16:53ZLaser cooling of high temperature superconductorsThesishttp://purl.org/coar/resource_type/c_db06uuid:17e39d42-d8c8-452c-bc1b-d8507e3876c2ORA Deposit2019Dietrich, AJaksch, D<p>In this dissertation, we theoretically demonstrate laser light induced control and cooling over the order parameter of superconducting cuprates. We predict a non-equilibrium state with enhanced robustness against thermal fluctuations when pumped with coherent pulses. This might ultimately increase the critical temperature of the cuprate. </p> <p>In particular, we propose a parametric cooling scheme for a bilayer cuprate modelled phenomenologically as a stack of long intrinsic Josephson junctions. We identify a parameter regime, which according to the switching current distribution allows a reduction of the effective system temperature by approximately 25%. This cooling scheme suppresses the thermal excitation of Josephson vortices. This might lead to an indirect mechanism for controlling topological excitations in the phase of the superconducting order parameter. </p> <p>We further find that the strong driving of the cuprates can lead to parametric instabilities. To investigate the effect strong driving can have on the dissipative dynamics, we derive a FloquetMarkov master equation. We find that strong driving is a measure for probing the bath spectral density of otherwise inaccessible condensed matter systems.</p> |
| spellingShingle | Dietrich, A Laser cooling of high temperature superconductors |
| title | Laser cooling of high temperature superconductors |
| title_full | Laser cooling of high temperature superconductors |
| title_fullStr | Laser cooling of high temperature superconductors |
| title_full_unstemmed | Laser cooling of high temperature superconductors |
| title_short | Laser cooling of high temperature superconductors |
| title_sort | laser cooling of high temperature superconductors |
| work_keys_str_mv | AT dietricha lasercoolingofhightemperaturesuperconductors |