Doan, Long

About

Long Doan is a professor affiliated with the University of Maryland, specializing in sociology with a focus on social psychology, emotions, and sexualities. His research encompasses a broad range of topics including the social dynamics of sexual minority populations, health and well-being disparities, family roles and responsibilities, and the impact of societal structures on marginalized groups. Doan's work often explores the intersections of formal rights and informal privileges, particularly in the context of same-sex couples, and investigates how social attitudes and emotional attributions influence perceptions and treatment of sexual minorities. His scholarship also addresses the effects of the COVID-19 pandemic on sexual minority health and family violence, highlighting the nuanced ways in which living arrangements and social environments affect mental health and well-being. Through his extensive publication record and collaborations with other scholars, Doan contributes to advancing understanding of social inequalities, identity disclosure, and the role of emotions in shaping social attitudes and behaviors.

Research topics

• Quantum mechanics
• Physics
• Statistical physics
• Condensed matter physics
• Mathematics
• Combinatorics
• Materials science
• Mathematical analysis
• Engineering
• Electrical engineering

Selected publications

• Beyond Fermi's golden rule with the statistical Jacobi approximation

  SciPost Physics · 2023-12-22 · 5 citations

  articleOpen access1st authorCorresponding

  Many problems in quantum dynamics can be cast as the decay of a single quantum state into a continuum. The time-dependent overlap with the initial state, called the fidelity, characterizes this decay. We derive an analytic expression for the fidelity after a quench to an ergodic Hamiltonian. The expression is valid for both weak and strong quenches, and timescales before finiteness of the Hilbert space limits the fidelity. It reproduces initial quadratic decay and asymptotic exponential decay wi…

  PublisherOA PDFDOI

• Edge theories for anyon condensation phase transitions

  Physical review. B./Physical review. B · 2024-02-20 · 4 citations

  article1st authorCorresponding

  The algebraic tools used to study topological phases of matter are not clearly suited to studying processes in which the bulk energy gap closes, such as phase transitions. We describe an elementary two edge thought experiment, which reveals the effect of an anyon condensation phase transition on the robust edge properties of a sample, bypassing a limitation of the algebraic description. In particular, the two edge construction allows some edge degrees of freedom to be tracked through the transit…

  PublisherDOI

• Topological phases of many-body localized systems: Beyond eigenstate order

  Physical review. B./Physical review. B · 2025-10-14 · 2 citations

  article1st authorCorresponding

  Many-body localization (MBL) lends remarkable robustness to nonequilibrium phases of matter. Such phases can show topological and symmetry-breaking order in their ground and excited states, but they may also belong to an anomalous localized topological phase (ALT phase). All eigenstates in an ALT phase are trivial, in that they can be deformed to product states, but the entire Hamiltonian cannot be deformed to a trivial localized model without going through a delocalization transition. Using a c…

  PublisherDOI

• Autonomous Stabilization of Floquet States Using Static Dissipation

  Physical Review X · 2025-07-07 · 2 citations

  articleOpen access

  Floquet engineering, in which the properties of a quantum system are modified through the application of strong periodic drives, is an indispensable tool in atomic and condensed matter systems. However, it is inevitably limited by intrinsic heating processes. We describe a simple autonomous scheme, which exploits a coupling between the driven system and a lossy auxiliary, to cool large classes of Floquet systems into desired states. We present experimental and theoretical evidence for the stabil…

  PublisherDOI

• Absence of disordered Thouless pumps at finite frequency

  Physical review. B./Physical review. B · 2024-11-04 · 1 citations

  article

  A Thouless pump is a slowly driven one-dimensional band insulator, which pumps charge at a quantized rate. Previous study showed that pumping persists in weakly disordered chains, and separately in clean chains at finite drive frequency. We study the interplay of disorder and finite frequency, and show that the pump rate always decays to zero because of nonadiabatic transitions between the instantaneous eigenstates. However, the decay is slow, occurring on a timescale that is exponentially large…

  PublisherDOI

Frequent coauthors

• Andrew C. Doherty

  University of Sydney

  24 shared

• Anushya Chandran

  Harvard University

  16 shared

• Philip J. D. Crowley

  Harvard University

  13 shared

• Richard Kueng

  8 shared

• Steven T. Flammia

  4 shared

• S. Das Sarma

  Joint Quantum Institute

  4 shared

• Dominik Vuina

  4 shared

• Yi-Ting Tu

  Joint Quantum Institute

  4 shared

Labs

• Long DoanPI

Education

• Ph.D., Physics

  Boston University

  2023

• Bachelor of Science (Advanced) (Honours), Physics

  University of Sydney

  2017

Similar researchers at University of Maryland, College Park

• Hargrove, Taylorh-21
• Presser, Stanleyh-3