Kaitlyn passed the exam on June 7th. She will be investigating matrix-free Monte Carlo methods for many-fermion systems and also developing a library of observables aimed to generate benchmarks and calculate the thermodynamics of neutron matter.
Congratulations!!!
Kaitlyn received our Department’s Hamilton award for summer support, and Yaqi received the Dean’s Graduate Fellowship from the College of Arts & Sciences, also for summer support.
Well deserved!!!
Really great work. The committee was impressed!!!
From the Graduate School website: “Dissertation Completion Fellowships support doctoral students in the final year of their dissertation by enabling them to focus full time on research and writing.”
Well deserved!
Complex Langevin and other approaches to the sign problem in quantum many-body physics
C.E. Berger, L. Rammelmueller, A.C. Loheac, F. Ehmann, J. Braun, J.E. Drut
Phys. Rep. 892, 1–54 (2021).
Article link
Ab initio nuclear thermodynamics
B. Lu, N. Li, S. Elhatisari, D. Lee, J. E. Drut, T. A. Lähde, E. Epelbaum, and Ulf-G. Meißner
Phys. Rev. Lett. 125, 192502 – Published 3 November 2020
Journal link: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.192502
Virial expansion of attractively interacting Fermi gases in one, two, and three dimensions, up to fifth order
Y. Hou and J. E. Drut
Phys. Rev. A 102, 033319 – Published 10 September 2020
Journal link: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.102.033319
arXiv link: https://arxiv.org/abs/1908.00174
Thermodynamics and static response of anomalous one-dimensional fermions via a quantum Monte Carlo approach in the worldline representation
J. R. McKenney, A. Jose, and J. E. Drut
Phys. Rev. A 102, 023313 – Published 14 August 2020
Journal link: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.102.023313
arXiv link: https://arxiv.org/abs/2003.01616
We’ve been (now officially) awarded NSF funding to study the thermodynamics of nuclei and nuclear matter!
Here’s an excerpt from the “Intellectual Merit” section of the summary:
At least half of the heavy elements in the periodic table are believed to be generated by r-process nucleosynthesis in neutron star mergers (NSMs). Whether those are indeed the sites of the r-process is a central question in nuclear astrophysics. To answer it, the dynamical evolution of NSMs is studied in astrophysics simulations, whose main microscopic input is the thermal equation of state of dense nuclear matter. Calculating the latter poses a challenging quantum many-body problem. The overarching objective of this project is to face that challenge, starting with the finite-temperature thermodynamics of neutron matter, using the ab initio non-perturbative tools of non-relativistic lattice field theory combined with chiral effective theory interactions. Calculations of the pairing, superfluidity, and clustering properties are also proposed, as they impact the structure and thermal evolution of neutron stars. The same theoretical tools will provide quantitative insight into the density of states of finite nuclei in an ab initio fashion, which is a long-standing problem in nuclear physics and an input for nuclear reaction theory.
Thermodynamics of rotating quantum matter in the virial expansion
C. E. Berger, K. J. Morrell, and J. E. Drut
Phys. Rev. A 102, 023309 – Published 6 August 2020
Journal link: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.102.023309
arXiv link: https://arxiv.org/abs/2004.02344
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