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Revision as of 11:56, 27 September 2018
1D nanoconfined helium: A versatile platform for exploring Luttinger liquid physics
This award supports joint experimental and theoretical research to explore quantum many-body physics in one spatial dimension using helium as a model system. One dimensional systems have been of long standing interest due to a profound difference from their 2 and 3 dimensional counterparts whose properties can be described in terms of quasi-particles. This quasi-particle picture breaks down completely in one dimension where the fundamental excitations are collective and described by the universal Tomonaga-Luttinger liquid (TLL) theory. The research team will develop, optimize and explore a novel platform for TLL physics. The project consists of tightly coupled experimental and quantum simulation research to (1) fabricate ordered templated porous materials preplated with rare-gas adsorbates as a confinement platform exhibiting nanometer scale pores; (2) Perform elastic neutron scattering measurements of the static correlation function; and (3) Carry out inelastic neutron scattering measurements. The main focus of the research team will be on two areas where theory predicts novel new behavior that has not been verified experimentally: (1) static correlations where TLL predicts an algebraic decay in the correlations even though no true long range order is possible; and (2) the dynamical excitations of the liquid where a "particle-hole" like excitations spectrum is predicted independent of the particle statistics. The integration of ab initio simulations with experimental scattering measurements will yield unambiguous confirmation of exotic field theory predictions in the laboratory.
This research will develop a deeper fundamental understanding of a model that is not only central to many areas of current interest, but also has technological applications in nanoelectronics, atomtronics, quantum sensing and quantum information science. The project will also provide students with a broad interdisciplinary training in synthesis and characterization, low temperature techniques, x-ray and neutron scattering, use of national facilities as well as field theory and high performance computation. The expertise of the research team will be leveraged to develop a new online course in Quantum Fluids and Solids which satisfies an underrepresented need at many universities.
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