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EPSRC Reference: EP/Z534304/1
Title: UNIHYPE: Universal hydrodynamic principles and emergent physics
Principal Investigator: Doyon, Professor B
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Department: Mathematics
Organisation: Kings College London
Scheme: Frontier Res Guarantee TFS
Starts: 01 January 2025 Ends: 31 December 2029 Value (£): 2,141,919
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Summary on Grant Application Form
Hydrodynamics is a powerful framework for studying the emergent, large-scale behaviours in many-body interacting systems. It is now understood that some of the general principles underlying hydrodynamics can in fact be applied much beyond conventional systems. This includes systems in one dimension of space which possess the property of integrability. These are, by many measures, non-chaotic, and therefore were believed until recently to lie beyond the realm of hydrodynamics. In the last few years I have co-pioneered and developed their hydrodynamic theory, dubbed generalised hydrodynamics. It is one of the most successful non-conventional hydrodynamic theory, and finds many applications, from soliton gas to models of statistical mechanics, quantum chains and cold atomic quantum gases, with stunning experimental verifications. The development of GHD required us to focus on the general structures of hydrodynamics, leading us to propose new general methods to understand physical quantities at the largest scales of space and time, including fluctuations, correlations, and ``structured behaviours" such as many-body oscillations. This calls for a re-think of what the universal principles of hydrodynamics are. Can we describe non-equilibrium motion, fluctuations, correlations and structured behaviours in many-body systems from hydrodynamic principles? Can these be derived from microscopic models? Do they form a basis for the emergent laws of many-body physics, from large to small scales? GHD gives partial answers and a clear way forward, but much is still open. This project will attempt to answer these questions, using GHD and integrability as powerful tools for physically relevant systems and exact calculations. This will require varied skills and expertises. My track record of directing successful research teams, combined with my world-leading expertise on generalised hydrodynamics and emergent behaviours, places me perfectly to lead this groundbreaking project.
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