Matter in Extreme Conditions

Lead Research Organisation: Plymouth University
Department Name: Sch of Computing & Mathematics


Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.
Description The research has addressed one of the outstanding issues in particle physics: the properties of matter at low temperatures and finite densities. Lattice gauge theories have been for many decades providing first principle results from the QCD, the theory of strong interactions. Since standard Monte-Carlo simulations of the these theories are impossible at finite densities due to the notorious sign problem, other approaches must come into play. We were abel to address this issue:
- by deriving an effective theory for the Polykov line that can be generalised to finite densities in an exact way. It is expected that the simulation of this theory should be less afflicted by the sign problem.
- by revealing effective degrees of freedom, the streamline configurations, that are linked to the property of colour confinement. At 2-5 nuclear matter densities, QCD is believed to udnergo a de-confinement transition. Hence, streamkine configuations are expected to paly a major role at these densities.
- by developping a new powerfull approach, the density-of-states method, which might provide a generic and practical solution of the sign problems at densities taht are highly rekevant for phenomenology (e.g. physics of compact stars). This has led to further developments (see below).
Exploitation Route The density-of-states method has already been generalised and successfully applied to address Quantum Fields Theories with a sign problem. This follow-up research is funded by STFC under "New Ideas fro Gauge Fields and Strings" (ST/L000350/1).
Sectors Digital/Communication/Information Technologies (including Software)



Description The award made it possible to install a tightly coupled HPC facility at Plymouth University (DiRAC framework). The installation became part of a HPC centre with additional hardware, funded by the Fcaulty and other fundin bodies, and, amog others, supporting rsearch in teh Marine Sciences. After the end of the award, the cluster is still maintained by the University. It still underpins Particle Physics research, helps to train stundents and professional in HPC adminsitartion and OS and facilitates student training at all levels in HPC simulations.
First Year Of Impact 2011
Sector Education
Impact Types Societal

Policy & public services

Description Laser_umea 
Organisation Umea University
Department Department of Physics
Country Sweden 
Sector Academic/University 
PI Contribution Scientific collaboration, discussions, publications
Collaborator Contribution scientific collaboration, publications
Impact Publications, visits
Start Year 2009
Description QFT_Jena 
Organisation Friedrich Schiller University Jena (FSU)
Department Theoretical - Institute of Physics
Country Germany 
Sector Academic/University 
PI Contribution discussions, seminars
Collaborator Contribution Scientific collaboration;
Impact two publications in peer reviewed journals
Start Year 2008
Description HPC_Teach 
Form Of Engagement Activity Participation in an activity, workshop or similar
Part Of Official Scheme? No
Geographic Reach Local
Primary Audience Professional Practitioners
Results and Impact Undergraduate and PhD HPC training, dissemination of HPC skills across research groups of the Faculty.

dissemination of HPC skills
Year(s) Of Engagement Activity 2010,2011,2012,2013,2014,2015,2016