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Dennis Clougherty

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Dennis Clougherty
NationalityAmerican
OccupationPhysicist, academic
Known forTheoretical condensed matter physics, quantum sticking and adsorption dynamics, atom-surface interactions

Dennis Clougherty is a theoretical physicist and professor affiliated with the University of Vermont (UVM), where his research addresses problems in condensed matter theory, with particular attention to the quantum mechanics of atoms interacting with surfaces and thin elastic membranes.[1] Over the course of his academic career he has produced a body of work centered on the infrared behavior of quantum systems coupled to vibrational fields, a topic that connects statistical mechanics, quantum field theory, and materials science.[2] His scholarship has appeared in journals including Physical Review B, Physical Review Research, and APL Quantum, and he has been the recipient of federal research funding from the National Science Foundation to support both his own investigations and undergraduate research training.[3]

Education

Clougherty received S.B. degrees in physics and electrical engineering, an S.M. in electrical engineering, and a Ph.D. in physics in 1989, all from the Massachusetts Institute of Technology.[4] He was a postdoctoral fellow at the University of California, Santa Barbara, before joining the University of Vermont faculty in 1992.[4]

Career

Clougherty has held a faculty position at the University of Vermont, where he has conducted research in theoretical physics for more than a decade and a half.[5] His institutional role has combined independent theoretical research with the mentoring of undergraduate researchers, a dimension of his career formalized through his direction of a National Science Foundation Research Experiences for Undergraduates (REU) site at UVM.[6] This program, funded at $286,000, was designed to give undergraduate students structured exposure to research in complex materials, situating Clougherty's career within a broader institutional effort at UVM to cultivate early-career scientists through hands-on laboratory and theoretical experience.[7]

Earlier in his tenure at UVM, Clougherty secured a separate NSF award, "Interaction of Ultracold Atoms and Molecules with Surfaces," funded at $240,000 beginning in September 2008.[8] This grant supported a research program examining the quantum dynamics of cold atomic and molecular species as they approach and interact with solid and low-dimensional surfaces, a theme that would recur throughout his subsequent publication record.[9] Combined, Clougherty's two identified NSF awards total $526,000 in federal research support across a span of years extending from 2008 through the early 2010s.[10]

Throughout his career, Clougherty has maintained an active publication record, with Semantic Scholar recording 70 papers attributed to his authorship and an aggregate citation count of 478, yielding an h-index of 14.[11] His most recent published work, appearing in 2024 and 2025, continues to explore the quantum mechanics of atoms coupled to vibrating membranes and cavities, indicating sustained research activity into the mid-2020s.[12]

Research

Clougherty's research program is organized around the theoretical physics of quantum sticking, adsorption, and the coupling of quantum particles to vibrational and electromagnetic environments. A recurring subject in his work is the "infrared problem," a term borrowed from quantum field theory describing the divergences and subtleties that arise when a quantum system interacts with a continuum of low-energy excitations, such as phonons in a solid or acoustic modes in a suspended membrane.[13]

In a 2017 paper, "Infrared problem in quantum acoustodynamics at finite temperature," Clougherty examined how thermal effects modify the infrared divergences that appear when a particle sticks to or scatters from a surface via emission and absorption of low-energy phonons; this paper has accumulated 8 citations, making it among his most cited works.[14] A companion piece from the same year, "Radiative corrections to quantum sticking on graphene," applied similar field theoretic techniques specifically to the two-dimensional material graphene, investigating how the flexural phonon modes of a suspended graphene sheet affect the probability that an incoming atom becomes adsorbed onto the surface.[15]

This graphene-focused line of inquiry continued in 2018 with two related contributions: "Infrared Problem in Cold Atom Quantum Physisorption on 2D Materials," published in the Journal of Physics Conference Series, and "Radiative Corrections to Quantum Sticking for Cold Atoms on Suspended Graphene."[16][17] These works extended his earlier finite-temperature and radiative correction analyses to the physisorption of cold atoms, a process relevant to experimental platforms in atomic, molecular, and optical physics where ultracold atoms are brought into proximity with two-dimensional materials.

By 2019, Clougherty's research expanded into a more general treatment of the quantum mechanics of thin elastic plates. In "Quantum and Thermal Fluctuations of a Thin Elastic Plate," published in Physical Review B and cited twice, he analyzed how zero-point quantum fluctuations and thermally driven fluctuations combine to determine the vibrational behavior of a thin elastic membrane, a system of interest both for fundamental studies of quantum mechanics in mesoscopic mechanical systems and for practical applications involving suspended two-dimensional materials such as graphene.[18] A related paper that year, "Quantization of the Vibrations of a Thin Elastic Plate," developed the formal quantum mechanical treatment underlying this fluctuation analysis.[19] In the same year, Clougherty also published a "Comment on 'Theory of phonon-assisted adsorption in graphene: Many-body infrared dynamics,'" a short critical response engaging directly with contemporaneous literature on the many-body infrared dynamics of phonon-assisted adsorption processes in graphene, reflecting his continued engagement with the broader research community working on these problems.[20]

More recently, Clougherty's research has moved toward the intersection of quantum optics and mechanical systems. His 2024 paper "Variational Approach to Atom-Membrane Dynamics," published in APL Quantum and cited three times as of the most recent count, introduced variational methods to model how an atom's quantum state evolves when coupled to the vibrational modes of a nearby membrane, a problem with implications for quantum sensing and hybrid quantum systems that combine atomic and mechanical degrees of freedom.[21] Building on this direction, his 2025 publications, "Purcell-Enhanced Quantum Adsorption" in Physical Review B and "Quantum Lamb Model" in Physical Review Research, extend his theoretical framework to incorporate the Purcell effect, a phenomenon in which the local electromagnetic or vibrational environment enhances or suppresses the rate of a quantum process, in this case the sticking or adsorption of an atom onto a surface.[22][23] The "Quantum Lamb Model" paper in particular draws an analogy to the classical Lamb model of a particle coupled to a continuous elastic medium, recasting it in a fully quantum mechanical setting to study dissipation and decoherence in atom-membrane systems.[24]

Across this body of work, Clougherty's contributions are unified by an emphasis on rigorous field theoretic treatment of infrared divergences and radiative corrections in condensed matter and atomic physics contexts, applied consistently to physical systems ranging from bulk solids to two-dimensional materials and, most recently, to engineered atom-membrane and atom-cavity architectures relevant to emerging quantum technologies.[25]

Recognition

Clougherty's research has been supported by competitive federal funding from the National Science Foundation on at least two occasions, including a $240,000 award for research on ultracold atom-surface interactions beginning in 2008 and a $286,000 award establishing a Research Experiences for Undergraduates site at the University of Vermont beginning in 2011.[26] His publications have appeared in established peer-reviewed physics journals, including Physical Review B and Physical Review Research, both published by the American Physical Society, as well as in the newer journal APL Quantum.[27] According to citation data aggregated by Semantic Scholar, his work has been cited a total of 478 times across 70 recorded publications, corresponding to an h-index of 14.[28] His 2017 paper on the infrared problem in quantum acoustodynamics at finite temperature stands as his most cited individual work within the dataset reviewed, with 8 citations recorded.[29]

Publications

  • Clougherty, D. "Purcell-Enhanced Quantum Adsorption." Physical Review B (2025).
  • Clougherty, D. "Quantum Lamb Model." Physical Review Research (2025).
  • Clougherty, D. "Variational Approach to Atom-Membrane Dynamics." APL Quantum (2024).
  • Clougherty, D. "Quantization of the Vibrations of a Thin Elastic Plate." (2019).
  • Clougherty, D. "Comment on 'Theory of phonon-assisted adsorption in graphene: Many-body infrared dynamics.'" Physical Review B (2019).
  • Clougherty, D. "Quantum and Thermal Fluctuations of a Thin Elastic Plate." Physical Review B (2019).
  • Clougherty, D. "Infrared Problem in Cold Atom Quantum Physisorption on 2D Materials." Journal of Physics: Conference Series (2018).
  • Clougherty, D. "Radiative Corrections to Quantum Sticking for Cold Atoms on Suspended Graphene." (2018).
  • Clougherty, D. "Infrared problem in quantum acoustodynamics at finite temperature." (2017).
  • Clougherty, D. "Radiative corrections to quantum sticking on graphene." (2017).

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  1. ↑ University of Vermont Department of Physics, faculty listing.
  2. ↑ Semantic Scholar author profile, Dennis Clougherty.
  3. ↑ National Science Foundation Award Search, Dennis Clougherty, University of Vermont.
  4. ↑ 4.0 4.1 Dennis Clougherty, faculty profile, Department of Physics, University of Vermont, https://www.uvm.edu/cems/physics/profile/dennis-clougherty
  5. ↑ University of Vermont Department of Physics, faculty listing.
  6. ↑ National Science Foundation Award Search, Award: REU Site: Undergraduate Research on Complex Materials, University of Vermont & State Agricultural College, April 1, 2011.
  7. ↑ National Science Foundation Award Search, Award: REU Site: Undergraduate Research on Complex Materials, University of Vermont & State Agricultural College, April 1, 2011.
  8. ↑ National Science Foundation Award Search, Award: Interaction of Ultracold Atoms and Molecules with Surfaces, University of Vermont & State Agricultural College, September 3, 2008.
  9. ↑ National Science Foundation Award Search, Award: Interaction of Ultracold Atoms and Molecules with Surfaces, University of Vermont & State Agricultural College, September 3, 2008.
  10. ↑ National Science Foundation Award Search, Dennis Clougherty, University of Vermont.
  11. ↑ Semantic Scholar author profile, Dennis Clougherty.
  12. ↑ Semantic Scholar author profile, Dennis Clougherty.
  13. ↑ Clougherty, D. "Infrared problem in quantum acoustodynamics at finite temperature," 2017.
  14. ↑ Clougherty, D. "Infrared problem in quantum acoustodynamics at finite temperature," 2017.
  15. ↑ Clougherty, D. "Radiative corrections to quantum sticking on graphene," 2017.
  16. ↑ Clougherty, D. "Infrared Problem in Cold Atom Quantum Physisorption on 2D Materials," Journal of Physics: Conference Series, 2018.
  17. ↑ Clougherty, D. "Radiative Corrections to Quantum Sticking for Cold Atoms on Suspended Graphene," 2018.
  18. ↑ Clougherty, D. "Quantum and Thermal Fluctuations of a Thin Elastic Plate," Physical Review B, 2019.
  19. ↑ Clougherty, D. "Quantization of the Vibrations of a Thin Elastic Plate," 2019.
  20. ↑ Clougherty, D. "Comment on 'Theory of phonon-assisted adsorption in graphene: Many-body infrared dynamics,'" Physical Review B, 2019.
  21. ↑ Clougherty, D. "Variational Approach to Atom-Membrane Dynamics," APL Quantum, 2024.
  22. ↑ Clougherty, D. "Purcell-Enhanced Quantum Adsorption," Physical Review B, 2025.
  23. ↑ Clougherty, D. "Quantum Lamb Model," Physical Review Research, 2025.
  24. ↑ Clougherty, D. "Quantum Lamb Model," Physical Review Research, 2025.
  25. ↑ Semantic Scholar author profile, Dennis Clougherty.
  26. ↑ National Science Foundation Award Search, Dennis Clougherty, University of Vermont.
  27. ↑ Semantic Scholar author profile, Dennis Clougherty.
  28. ↑ Semantic Scholar author profile, Dennis Clougherty.
  29. ↑ Clougherty, D. "Infrared problem in quantum acoustodynamics at finite temperature," 2017.
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