The mission of the Department of Physics at UMBC is based on three pillars: education, research and service to society. We strive to provide outstanding educational opportunities, through instruction and research, for undergraduate physics majors seeking preparation for graduate school or entry into the workforce. We also aim to train graduate students to be leaders in their field of research. Our research goal is to grow and sustain internationally recognized research groups in atmospheric physics, astrophysics, condensed matter physics and quantum optics and information science. Through our teaching of physics to non-science and non-physics majors and through our Physics for Secondary Education Teachers program, we provide professional service to the university community and the State.

Recent Submissions

  • Maximizing optical production of metastable xenon 

    Lamsal, H.P.; Franson, J.D.; Pittman, T.B. (2020-06-05)
    The wide range of applications using metastable noble gas atoms has led to a number of different approaches for producing large metastable state densities. Here we investigate a recently proposed hybrid approach that ...
  • Kibble-Zurek scaling in quantum speed limits for shortcuts to adiabaticity 

    Puebla, Ricardo; Deffner, Sebastian; Campbell, Steve (2020-06-08)
    Geometric quantum speed limits quantify the trade-off between the rate with which quantum states can change and the resources that are expended during the evolution. Counterdiabatic driving is a unique tool from shortcuts ...
  • Tuneable structure and magnetic properties in Fe₃₋ₓVₓGe alloys 

    Mahat, R.; KC, Shambhu; Wines, D.; Ersan, F.; Regmi, S.; Karki, U.; White, R.; Ataca, C.; Padhan, P.; Gupta, A.; LeClair, P. (Elsevier, 2020-02-25)
    We report a detailed experimental and theoretical study of the effects of V substitution for Fe atom on the structural, magnetic, transport, electronic and mechanical properties of an off-stoichiometric Fe₃₋ₓVₓGe intermetallic ...
  • Assimilation of lidar back-scatter and wind retrievals of planetary boundary layer height into WRF atmospheric forecast states 

    Tangborn, Andrew; Demoz, Belay; Carroll, Brian J.; Santanello, Joseph A.; Anderson, Jeffrey L. (Copernicus Publications, 2020-04-29)
    Lidar backscatter and wind retrievals of the planetary boundary layer height (PBLH) are assimilated into forecasts from the NASA Unified - Weather and Research Forecast (NU-WRF) model during the Plains Elevated Convection ...
  • X-ray Binary Luminosity Function Scaling Relations in Elliptical Galaxies: Evidence for Globular Cluster Seeding of Low-Mass X-ray Binaries in Galactic Fields 

    Lehmer, Bret D.; Ferrell, Andrew P.; Doore, Keith; Eufrasio, Rafael T.; Monson, Erik B.; Alexander, David M.; Basu-Zych, Antara; Brandt, William N.; Sivakoff, Greg; Tzanavaris, Panayiotis; Yukita, Mihoko; Fragos, Tassos; Ptak, Andrew (2020-04-27)
    We investigate X-ray binary (XRB) luminosity function (XLF) scaling relations for Chandra detected populations of low-mass XRBs (LMXBs) within the footprints of 24 early-type galaxies. Our sample includes Chandra and HST ...
  • Inferring astrophysical X-ray polarization with deep learning 

    Moriakov, Nikita; Samudre, Ashwin; Negro, Michela; Gieseke, Fabian; Otten, Sydney; Hendriks, Luc (2020-05-16)
    We investigate the use of deep learning in the context of X-ray polarization detection from astrophysical sources as will be observed by the Imaging X-ray Polarimetry Explorer (IXPE), a future NASA selected space-based ...
  • VERITAS Discovery of VHE Emission from the Radio Galaxy 3C 264: A Multi-Wavelength Study 

    A. Archer; et al (2020-05-06)
    The radio source 3C 264, hosted by the giant elliptical galaxy NGC 3862, was observed with VERITAS between February 2017 and May 2019. These deep observations resulted in the discovery of very-high-energy (VHE; E >100 GeV) ...
  • The variable and non-variable X-ray absorbers in Compton-thin type-II Active Galactic Nuclei 

    Laha, Sibasish; Markowitz, Alex G.; Krumpe, Mirko; Nikutta, Robert; Rothschild, Richard; Saha, Tathagata (2020-05-12)
    We have conducted an extensive X-ray spectral variability study of a sample of 20 Compton-thin type II galaxies using broad band spectra from XMM-Newton, Chandra, and Suzaku. The aim is to study the variability of the ...
  • Resolving the soft X-ray ultra fast outflow in PDS 456 

    Reeves, James; Braito, Valentina; Chartas, George; Hamann, Fred; Laha, Sibasish; Nardini, Emanuele (2020-04-26)
    Past X-ray observations of the nearby luminous quasar PDS 456 (at z=0.184) have revealed a wide angle accretion disk wind (Nardini et al. 2015), with an outflow velocity of ∼−0.25c, as observed through observations of its ...
  • Nonlocal Dispersion Cancellation for Three or More Photons 

    Nodurf, C.; Shringarpure, S. U.; Kirby, B. T.; Pittman, T.B.; Franson, J. D.
    The entanglement of quantum systems can produce a variety of nonclassical effects that have practical applications in quantum information science. One example of this is nonlocal dispersion cancellation, in which the effects ...
  • The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope 

    Mirabal, N.; Negro, M.; et al (IOP, 2020-04-02)
    The fourth catalog of active galactic nuclei (AGNs) detected by the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) between 2008 August 4 and 2016 August 2 contains 2863 objects located at high Galactic latitudes ...
  • X-ray monitoring of the radio and γ-ray loud Narrow-Line Seyfert 1 Galaxy PKS2004–447 

    Kreikenbohm, A.; Kadler, M.; Wilms, J.; Schulz, R.; Müller, C.; Ojha, R.; Ros, E.; Mannheim, K.; Elsässer, D. (EDP sciences, 2013-12-09)
    We present preliminary results of the X-ray analysis of XMM-Newton and Swift observations as part of a multi-wavelength monitoring campaign in 2012 of the radio-loud narrow line Seyfert 1 galaxy PKS 2004–447. The source ...
  • X-Ray and GeV Gamma-Ray Variability of the Radio Galaxy NGC 1275 

    Fukazawa, Yasushi; Shiki, Kensei; Tanaka, Yasuyuki; Itoh, Ryosuke; Takahashi, Hiromitsu; Imazato, Fumiya; Dutka, Filippo; Ojha, Roopesh; Nagai, Hiroshi (IOP, 2018-03-12)
    We analyzed Suzaku/XIS data (2006–2015) and Fermi/LAT data (2008–2015) of the gamma-ray emitting radio galaxy NGC 1275. Correlated brightening of the nucleus in both the X-ray and GeV gamma-ray energy bands was found for ...
  • WHY DO COMPACT ACTIVE GALACTIC NUCLEI AT HIGH REDSHIFT SCINTILLATE LESS? 

    Koay, J. Y.; Macquart, J-P.; Rickett, B. J.; Bignall, H. E.; Jauncey, D. L.; Pursimo, T.; Reynolds, C.; Lovell, J. E. J.; Kedziora-Chudczer, L.; Ojha, R. (IOP, 2012-08-12)
    The fraction of compact active galactic nuclei (AGNs) that exhibit interstellar scintillation (ISS) at radio wavelengths, as well as their scintillation amplitudes, have been found to decrease significantly for sources at ...
  • What is the Structure of Relativistic Jets in AGN on Scales of Light Days? 

    Zacharias, Norbert; Johnston, Kenneth; Boboltz, David; Fey, Alan L.; Gaume, Ralph; Ojha, Roopesh; Meier, David L.; Murphy, David W.; Jones, Dayton L.; Unwin, Stephen C.; Piner, B. Glenn (2009-02-11)
    The structure of relativistic jets in AGN on scales of light days reveals how energy propagates through jets, a process that is fundamental to galaxy evolution. A deeper understanding of jet physics will clarify the ...
  • VLBI studies of TANAMI radio galaxies 

    Angioni, Roberto; Rösch, Florian; Ros, Eduardo; Kadler, Matthias; Ojha, Roopesh; Müller, Cornelia; Schulz, Robert; TANAMI collaboration (2016-12-07)
    Radio galaxies are relatively faint at γ-ray energies, where they make up only 1-2% of all AGN detected by Fermi-LAT. However, they offer a unique perspective to study the intrinsic properties of AGN jets. For this reason, ...
  • VLBI Observations of the Gigahertz-Peaked Spectrum Galaxy PKS 1934−638 

    Ojha, Roopesh; Fey, Alan L.; Johnston, Kenneth J.; Tzioumis, Anastasios K.; Reynolds, John E. (IOP, 2004-04-01)
    We present 8.4 GHz VLBI observations of the gigahertz-peaked spectrum source PKS 1934-638 made with the Australian Long Baseline Array. Our observations confirm the compact double nature of the source and yield measured ...
  • VLBI Observations of Southern Hemisphere ICRF Sources. II. Astrometric Suitability Based on Intrinsic Structure 

    Ojha, Roopesh; Fey, Alan L.; Charlot, Patrick; Jauncey, David L.; Johnston, Kenneth J.; Reynolds, John E.; Tzioumis, Anastasios K.; Quick, Jonathan F. H.; Nicolson, George D.; Ellingsen, Simon P.; McCulloch, Peter M.; Koyama, Yasuhiro (IOP, 2005-12-01)
    We present 8.4 GHz very long baseline interferometry (VLBI) observations of 48 southern hemisphere extragalactic sources from the International Celestial Reference Frame. These are the second in a series of observations ...
  • VLBI Observations of Southern Hemisphere ICRF Sources. I. 

    Ojha, Roopesh; Fey, Alan L.; Johnston, Kenneth J.; Jauncey, David L.; Reynolds, John E.; Tzioumis, Anastasios K.; Quick, Jonathan F. H.; Nicolson, George D.; Ellingsen, Simon P.; Dodson, Richard G.; McCulloch, Peter M. (IOP, 2004-06-01)
    We present 8.4 GHz very long baseline interferometry (VLBI) observations of 69 southern hemisphere extragalactic sources in the International Celestial Reference Frame. These are the first in a series of observations ...
  • VLBA Snapshot Imaging Survey of Scintillating Sources 

    Ojha, Roopesh; Fey, Alan L.; Lovell, James E. J.; Jauncey, David L.; Johnston, Kenneth J. (IOP, 2004-10-01)
    We present 8.4 GHz Very Long Baseline Array (VLBA) observations of 75 extragalactic radio sources drawn from the scintillating sources discovered in the Microarcsecond Scintillation-induced Variability survey. This survey ...

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