| EPSRC Reference: |
GR/L74620/01 |
| Title: |
SPECTROSCOPY OF SINGLE QUANTUM OBJECT SQUID RINGS IN MICROWAVE FIELDS |
| Principal Investigator: |
Clark, Professor T |
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| Department: |
Sch of Engineering and Design |
| Organisation: |
University of Sussex |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 October 1997 |
Ends: |
31 March 2001 |
Value (£): |
235,815
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| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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This programme arises from the experimental work that we have carried out over the last three years on the interaction of monochromatic microwaves with quantum mechanical SQUID rings. We have demonstrated, experimentally and theoretically, that the SQUID ring can be treated under appropriate conditions as a two-level system. Also, in general, microwave fields interact non-perturbatively with quantum mechanical SQUID rings so that multi-photon absorption processes dominate. This non-adiabatic interaction occurs when the interaction energy coupling the field to the SQUID ring is comparable with the energy spacing between levels of the ring, a situation which is very easy to engineer for SQUID rings. Only for low microwave frequencies (typically < 1ghz) and amplitudes does the ring remain adiabatically in its ground state. Our goal is to observe microwave induced (pumped) quantum jumps in a SQUID ring which we may be able to probe in a relatively controlled way by adjustment of the external (quasi-static) magnetic flux applied to the ring. We also expect to explore inverse non-perturbative processes in a microwave pumped SQUID ring where quantum parametric down conversion may occur between the microwave frequency and the radio frequency signal used to monitor the state of the ring.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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| Date Materialised |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.sussex.ac.uk |