Department of Physics
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Departmental Publications, Department of Physics [30]
Newsletters, annual reports, and other departmental publications -
Scholarly Works, Department of Physics [807]
Research articles, presentations, and other scholarship
Recent Submissions
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Quanta 2020/2021
(Virginia Tech, 2020)A publication for the faculty, staff, students, alumni, emeriti & friends of the Department of Physics at Virginia Tech. -
Hidden exceptional symmetry in the pure spinor superstring
(2020-01-06)The pure spinor formulation of superstring theory includes an interacting sector of central charge c(lambda) = 22, which can be realized as a curved beta gamma system on the cone over the orthogonal Grassmannian OG(+) ... -
Reevaluating reactor antineutrino anomalies with updated flux predictions
(2020-01-14)Hints for the existence of a sterile neutrino at nuclear reactors are reexamined using two updated predictions for the fluxes of antineutrinos produced in fissions. These new predictions diverge in their preference for the ... -
Anapole dark matter quantum mechanics
(2020-01-23)The dynamics of an anapole seen as dark matter at low energies is studied by solving the Schrodinger-Pauli equation in a potential involving the Dirac delta and its derivatives in three dimensions. This is an interesting ... -
Parallel temperature interfaces in the Katz-Lebowitz-Spohn driven lattice gas
(2020-11-27)We explore a variant of the Katz–Lebowitz–Spohn (KLS) driven lattice gas in two dimensions, where the lattice is split into two regions that are coupled to heat baths with distinct temperatures. The geometry was arranged ... -
Profile retrieval of a buried periodic structure using spin echo grazing incidence neutron scattering
(2020-03-09)When the neutron scattering technique, Spin Echo Resolved Grazing Incidence Scattering (SERGIS) concept, was originally put forward by Rekveldt [Physica B 1135, 234-236 (1997)] and Felcher et al. [Proc. SPIE 4785, 164 ... -
Interference between the atmospheric and solar oscillation amplitudes
(2020-05-12)We propose to detect the interference effect between the atmospheric-scale and solar-scale waves of neutrino oscillation, one of the key consequences of the three-generation structure of leptons. In vacuum, we show that ... -
Bounds on cosmic ray-boosted dark matter in simplified models and its corresponding neutrino-floor
(2020-06-15)We study direct detection bounds on cosmic ray-upscattered dark matter in simplified models including light mediators. We find that the energy dependence in the scattering cross section is significant, and produces stronger ... -
Dark matter-neutrino interconversion at COHERENT, direct detection, and the early Universe
(2020-07-14)We study a dark matter (DM) model in which the dominant coupling to the standard model occurs through a neutrino-DM-scalar coupling. The new singlet scalar will generically have couplings to nuclei/electrons arising from ... -
Social distancing and epidemic resurgence in agent-based Susceptible-Infectious-Recovered models
Once an epidemic outbreak has been effectively contained through non-pharmaceutical interventions, a safe protocol is required for the subsequent release of social distancing restrictions to prevent a disastrous resurgence ... -
Strong constraints on thermal relic dark matter from Fermi-LAT observations of the Galactic Center
(2020-08-20)The extended excess toward the Galactic Center (GC) in gamma rays inferred from Fermi-LAT observations has been interpreted as being due to dark matter (DM) annihilation. Here, we perform new likelihood analyses of the GC ... -
The effects of coating culture dishes with collagen on fibroblast cell shape and swirling pattern formation
(2020-09)Motile human-skin fibroblasts form macroscopic swirling patterns when grown to confluence on a culture dish. In this paper, we investigate the effect of coating the culture-dish surface with collagen on the resulting ... -
Testing the ER = EPR conjecture
(2020-09-15)We discuss a few tests of the ER = EPR proposal. We consider certain conceptual issues as well as explicit physical examples that could be experimentally realized. In particular, we discuss the role of the Bell bounds, the ... -
Extending the geometry of heterotic spectral cover constructions
(2020-07)In this work we extend the well-known spectral cover construction first developed by Friedman, Morgan, and Witten to describe more general vector bundles on elliptically fibered Calabi-Yau geometries. In particular, we ... -
Precise high-fidelity electron-nuclear spin entangling gates in NV centers via hybrid dynamical decoupling sequences
(2020-07)Color centers in solids, such as the nitrogen-vacancy center in diamond, offer well-protected and well-controlled localized electron spins that can be employed in various quantum technologies. Moreover, the long coherence ... -
Parallel Temperature Interfaces in the Katz-Lebowitz-Spohn Driven Lattice Gas
We explore a variant of the Katz-Lebowitz-Spohn (KLS) driven lattice gas in two dimensions, where the lattice is split into two regions that are coupled to heat baths with distinct temperatures. The temperature boundaries ... -
Social distancing and epidemic resurgence in agent-based Susceptible-Infectious-Recovered models
Once an epidemic outbreak has been effectively contained through non-pharmaceutical interventions, a safe protocol is required for the subsequent release of social distancing restrictions to prevent a disastrous resurgence ... -
Coupled two-species model for the pair contact process with diffusion
(American Physical Society (APS), 2020-10-22)The contact process with diffusion (PCPD) defined by the binary reactions B+B→B+B+B, B+B→∅ and diffusive particle spreading exhibits an unusual active to absorbing phase transition whose universality class has long been ... -
Critical dynamics of anisotropic antiferromagnets in an external field
(American Physical Society (APS), 2020-03-03)We numerically investigate the non-equilibrium critical dynamics in three-dimensional anisotropic antiferromagnets in the presence of an external magnetic field. The phase diagram of this system exhibits two critical lines ... -
Structural, in silico, and functional analysis of a Disabled-2-derived peptide for recognition of sulfatides
(2020-08-11)Disabled-2 (Dab2) is an adaptor protein that regulates the extent of platelet aggregation by two mechanisms. In the first mechanism, Dab2 intracellularly downregulates the integrin alpha (IIb)beta (3) receptor, converting ...
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