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74 papers · 1 filter
Emergent Time Scale in Entangled Quantum Dynamics of Ultracold Molecules in Optical Lattices
M. L. Wall, L. D. Carr
We derive a novel lattice Hamiltonian, the \emph{Molecular Hubbard Hamiltonian} (MHH), which describes the essential many body physics of closed-shell ultracold heteronuclear molec…
Galactic Bars in Cosmological Context
Isaac Shlosman
Galactic disks can form in asymmetric potentials of the assembling dark matter (DM) halos, giving rise to the first generation of gas-rich bars. Properties of these bars differ fro…
ab initio frame transformation calculations of direct and indirect dissociative recombination rates of HeH+ + e-
Daniel J. Haxton, Chris H. Greene
The HeH cation undergoes dissociative recombination with a free electron to produce neutral He and H fragments. We present calculations using ab initio quantum defects and Fano…
Polarization dependence of semiconductor exciton and biexciton contributions to phase-resolved optical two-dimensional Fourier-transform spectra
Alan D. Bristow, Denis Karaiskaj, Xingcan Dai +2
We study the coherent light-matter interactions of GaAs quantum wells associated with excitons, biexcitons and many-body effects. For most polarization configurations, excitonic fe…
Ultracold polar molecules near quantum degeneracy
S. Ospelkaus, K. -K. Ni, M. H. G. de Miranda +6
We report the creation and characterization of a near quantum-degenerate gas of polar K-Rb molecules in their absolute rovibrational ground state. Starting from weakl…
How rapidly do neutron stars spin at birth?
Roberto Soria, Rosalba Perna, David Pooley +1
We have studied the X-ray properties of ageing historical core-collapse supernovae in nearby galaxies, using archival data from Chandra, XMM-Newton and Swift. We found possible evi…