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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

• #### Conditions for Equivalent Noise Sensitivity of Geometric and Dynamical Quantum Gates ﻿

(APS, 2022-07-19)
Geometric quantum gates are often expected to be more resilient than dynamical gates against certain types of error, which would make them ideal for robust quantum computing. However, this is still up for debate due to ...
• #### BASS. XXVIII. Near-infrared Data Release 2: High-ionization and Broad Lines in Active Galactic Nuclei* ﻿

(AAS, 2022-07-15)
We present the BAT AGN Spectroscopic Survey (BASS) Near-infrared Data Release 2 (DR2), a study of 168 nearby ($\bar{z}=0.04$, z < 0.6) active galactic nuclei (AGN) from the all-sky Swift Burst Array Telescope X-ray survey ...
• #### Where does the dust deposited over the Sierra Nevada snow come from? ﻿

(EGU, 2022-07-06)
Mineral dust contributes up to one-half of surface aerosol loading in spring over the southwestern U.S., posing an environmental challenge that threatens human health and the ecosystem. Using the self-organizing map (SOM) ...
• #### Criteria for the (in)stability of planar interfaces in singularly perturbed 2-component reaction-diffusion equations ﻿

(2022-07-11)
We consider a class of singularly perturbed 2-component reaction-diffusion equations which admit bistable traveling front solutions, manifesting as sharp, slow-fast-slow, interfaces between stable homogeneous rest states. ...
• #### Nonadiabatic quantum control of quantum dot arrays with fixed exchange using Cartan decomposition ﻿

(2022-07-06)
In semiconductor spin qubits which typically interact through short-range exchange coupling, shuttling of spin is a practical way to generate quantum operations between distant qubits. Although the exchange is often tunable ...
• #### RXTE Observation of the Nonthermal Emission from the Early Stage Merger in A1750 ﻿

(IOP, 2022-06-29)
We make the first observation-based calculation of the energy that goes into cosmic ray protons versus cosmic ray electrons in shock acceleration during structure formation. We find a ratio of energy in cosmic ray protons ...
• #### Shortcuts to thermodynamic quasistaticity ﻿

(2022-06-24)
The operation of near-term quantum technologies requires the development of feasible, implementable, and robust strategies of controlling complex many body systems. However, currently existing shortcuts to adiabaticity'' ...
• #### Nonlinear speed-ups in ultracold quantum gases ﻿

(2022-06-27)
Quantum mechanics is an inherently linear theory. However, collective effects in many body quantum systems can give rise to effectively nonlinear dynamics. In the present work, we analyze whether and to what extent such ...

• #### Variability of extragalactic X-ray jets on kiloparsec scales ﻿

(2022-06-14)
Super-massive black holes residing at the centres of galaxies can launch powerful radio-emitting plasma jets which reach scales of hundreds of thousands of light-years, well beyond their host galaxies.1 The advent of ...
• #### Low-Frequency Oscillations in Optical Measurements of Metal-Nanoparticle Vibrations ﻿

(ACS, 2022-06-14)
Time-resolved optical measurements of vibrating metal nanoparticles have been used extensively to probe the ultrafast mechanical properties of the nanoparticles and of the surrounding liquid, but nearly all investigations ...
• #### Galactic Extinction: How Many Novae Does It Hide and How Does It Affect the Galactic Nova Rate? ﻿

(AAS, 2021-11-16)
There is a long-standing discrepancy between the observed Galactic classical nova rate of ∼10 yr−1 and the predicted rate from Galactic models of ∼30–50 yr−1. One explanation for this discrepancy is that many novae are ...
• #### Size-Resolved Dust Direct Radiative Effect Efficiency Derived from Satellite Observations ﻿

(EGU, 2022-06)
The role of mineral dust aerosol in global radiative energy budget is often quantified by the dust direct radiative effect (DRE). The dust DRE strongly depends on dust aerosol optical depth (DAOD), therefore, DRE efficiency ...
• #### Controlled etching and tapering of Au nanorods using cysteamine ﻿

(Royal Society of Chemistry, 2018-08-31)
While gold nanorods (AuNRs) have found many applications due to their unique optical properties, a few challenges persist in their synthesis. Namely, it is often difficult to reproducibly synthesize AuNRs with specific and ...
• #### Weakly conjugated bacteriochlorin-bacteriochlorin dyad: Synthesis and photophysical properties ﻿

(World Scientific, 2021-06-01)
Dyads containing two near-infrared absorbing and emitting bacteriochlorins with distinct spectral properties have been prepared and characterized by absorption, emission, and transient-absorption spectroscopies. The dyads ...
• #### Eta Carinae: an evolving view of the central binary, its interacting winds and its foreground ejecta ﻿

(2022-05-30)
FUV spectra of Eta Car, recorded across two decades with HST/STIS, document multiple changes in resonant lines caused by dissipating extinction in our line of sight. The FUV flux has increased nearly ten-fold which has led ...
• #### Optimal finite-time processes in weakly driven overdamped Brownian motion ﻿

(2022-06-08)
The complete physical understanding of the optimization of the thermodynamic work still is an important open problem in stochastic thermodynamics. We address this issue using the Hamiltonian approach of linear response ...
• #### Strong coupling of emitters to single plasmonic nanoparticles: Exciton-induced transparency and Rabi splitting ﻿

(Royal Society of Chemistry, 2019-07-22)
Strong coupling between plasmons in metal nanoparticles and single excitons in molecules or semiconductor nanomaterials has recently attracted considerable experimental effort for potential applications in quantum-mechanical ...
• #### Solvent-dependent energy and charge transfer dynamics in hydroporphyrin-BODIPY arrays ﻿

(AIP, 2020-08-17)
Arrays of hydroporphyrins with boron complexes of dipyrromethene (BODIPY) are a promising platform for biomedical imaging or solar energy conversion, but their photophysical properties have been relatively unexplored. In ...
• #### Gamma Rays from Fast Black-hole Winds ﻿

(AAS, 2021-11-10)
Massive black holes at the centers of galaxies can launch powerful wide-angle winds that, if sustained over time, can unbind the gas from the stellar bulges of galaxies. These winds may be responsible for the observed ...