| EPSRC Reference: |
GR/K15558/01 |
| Title: |
THE OBSERVATION OF MACROSCOPIC QUANTUM PHENOMENA IN SUPERCONDUCTING WEAK LINK SQUID RINGS |
| Principal Investigator: |
Clark, Professor T |
| Other Investigators: |
|
| Researcher Co-Investigators: |
|
| Project Partners: |
|
| Department: |
Mathematical & Physical Sciences |
| Organisation: |
University of Sussex |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 January 1995 |
Ends: |
31 December 1996 |
Value (£): |
45,688
|
| EPSRC Research Topic Classifications: |
|
| EPSRC Industrial Sector Classifications: |
|
| Related Grants: |
|
| Panel History: |
|
|
Summary on Grant Application Form |
|
In this programme we propose to investigate macroscopic quantum phenomena in ultra small capacitance niobium microbridge, tunnel junction and point contact weak link SQUID rings. We intend to probe transitions between low lying energy levels by direct frequency shift techniques. Both induced (stimulated) and, apparently, spontaneous transitions have already been observed between the ground (K=0) and first excited state (K=1) levels. We are interested in the distribution of lifetimes in the K=1 state and the evolution between K=1 and 0 states, which will be one focus of the programme. We also intend to explore higher excited states which, given more controlled circuit parameterisation (weak link capacitance and critical current) should allow more precise comparisons with computing energy bands. Susceptibility studies of the K=1 state will also be a focus of interest since, theoretically X1(Phi x) can be <-1 at applied flux. This is of great fundamental interest since thermodynamically (following the second law) this should not be an accessible state. We will also expect to continue our work on the high frequency dynamics (derived from SQUID magnetometry) of quantum SQUID rings since these also provide quantitative information on low lying SQUID states.
|
|
Key Findings |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Potential use in non-academic contexts |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
|
Impacts |
|
| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
|
| Date Materialised |
|
|
|
|
Sectors submitted by the Researcher |
|
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
|
| Project URL: |
|
| Further Information: |
|
| Organisation Website: |
http://www.sussex.ac.uk |