@article{rupak_lee_2013, title={Radiative Capture Reactions in Lattice Effective Field Theory}, volume={111}, ISSN={["0031-9007"]}, DOI={10.1103/physrevlett.111.032502}, abstractNote={We outline a general method for computing nuclear capture reactions on the lattice. The method consists of two major parts. In this study we detail the second part which consists of calculating an effective two-body capture reaction on the lattice at finite volume. We solve this problem by calculating the two-point Green's function using an infrared regulator and the capture amplitude to a two-body bound state. We demonstrate the details of this method by calculating on the lattice the leading M1 contribution to the radiative neutron capture on proton at low energies using pionless effective field theory. We find good agreement with exact continuum results. The approach we outline here can be used in a wide range of applications including few-body reactions in cold atomic systems and hadronic reactions in lattice quantum chromodynamics.}, number={3}, journal={PHYSICAL REVIEW LETTERS}, author={Rupak, Gautam and Lee, Dean}, year={2013}, month={Jul} }
@article{rupak_schaefer_2009, title={Density functional theory for non-relativistic fermions in the unitarity limit}, volume={816}, ISSN={["1873-1554"]}, url={http://inspirehep.net/record/783628}, DOI={10.1016/j.nuclphysa.2008.11.004}, abstractNote={We derive an energy density functional for non-relativistic spin one-half fermions in the limit of a divergent two-body scattering length. Using an epsilon expansion around d=4−ε spatial dimensions we compute the coefficient of the leading correction beyond the local density approximation (LDA). In the case of N fermionic atoms trapped in a harmonic potential this correction has the form E=ELDA(1+cs(3N)−2/3), where ELDA is the total energy in LDA approximation. At next-to-leading order in the epsilon expansion we find cs=1.68, which is significantly larger than the result for non-interacting fermions, cs=0.5.}, journal={NUCLEAR PHYSICS A}, author={Rupak, Gautam and Schaefer, Thomas}, year={2009}, month={Jan}, pages={52–64} }
@misc{furnstahl_rupak_schafer_2008, title={Effective field theory and finite-density systems}, volume={58}, journal={Annual Review of Nuclear and Particle Science}, author={Furnstahl, R. J. and Rupak, G. and Schafer, T.}, year={2008}, pages={1–25} }
@article{jaikumar_rupak_steiner_2008, title={Viscous damping of r-mode oscillations in compact stars with quark matter}, volume={78}, number={12}, journal={Physical Review. D, Particles, Fields, Gravitation, and Cosmology}, author={Jaikumar, P. and Rupak, G. and Steiner, A. W.}, year={2008} }
@article{rupak_schafer_2007, title={Shear viscosity of a superfluid Fermi gas in the unitarity limit}, volume={76}, number={5}, journal={Physical Review. A}, author={Rupak, G. and Schafer, T.}, year={2007} }