62 citations · 369 across the 19 of their papers we have counts for
19 papers
Weak-coupling bound states in semi-infinite topological waveguide QED
Savannah Garmon, Gonzalo Ordonez, Kenichi Noba
A striking feature of cavity quantum electrodynamics is the existence of atom-photon bound states, which typically form when the coupling between the atom and its environment are s…
Enhanced classical radiation damping of electronic cyclotron motion in the vicinity of the Van Hove singularity in a waveguide
Yuki Goto, Savannah Garmon, Tomio Petrosky
We study the damping process of electron cyclotron motion and the resulting emission in a waveguide using the classical Friedrichs model without relying on perturbation analysis su…
Characteristic influence of exceptional points in quantum dynamics
Savannah Garmon, Takafumi Sawada, Kenichi Noba +1
We review some recent work on the occurrence of coalescing eigenstates at exceptional points in non-Hermitian systems and their influence on physical quantities. We particularly fo…
Reservoir-assisted symmetry breaking and coalesced zero-energy modes in an open PT-symmetric Su-Schrieffer-Heeger model
Savannah Garmon, Kenichi Noba
We study a model consisting of a central -symmetric trimer with non-Hermitian strength parameter coupled to two semi-infinite Su-Schrieffer-Heeger (SSH) leads. We…
Anomalous-order exceptional point and non-Markovian Purcell effect at threshold in one-dimensional continuum systems
Savannah Garmon, Gonzalo Ordonez, Naomichi Hatano
For a system consisting of a quantum emitter coupled near threshold (band edge) to a one-dimensional continuum with a van Hove singularity in the density of states, we demonstrate…
Coherent single-spin electron resonance spectroscopy manifested at an exceptional-point singularity in a doped polyacetylene
Yujin Dunham, Kazuki Kanki, Savannah Garmon +2
Spin-dependent charge transfer decay in an alkali atom doped polyacetylene is studied in terms of the complex spectral analysis, revealing the single-spin Zeeman splitting influenc…
Non-Markovian dynamics revealed at the bound state in continuum
Savannah Garmon, Kenichi Noba, Gonzalo Ordonez +1
We propose a methodical approach to controlling and enhancing deviations from exponential decay in quantum and optical systems by exploiting recent progress surrounding another sub…
A new perspective on the Fano absorption spectrum in terms of complex spectral analysis
Taku Fukuta, Savannah Garmon, Kazuki Kanki +2
A new aspect of understanding a Fano absorption spectrum is presented in terms of the complex spectral analysis. The absorption spectrum of an impurity embedded in semi-infinite su…
Exact description of coalescing eigenstates in open quantum systems in terms of microscopic Hamiltonian dynamics
Kazuki Kanki, Savannah Garmon, Satoshi Tanaka +1
At the exceptional point where two eigenstates coalesce in open quantum systems, the usual diagonalization scheme breaks down and the Hamiltonian can only be reduced to Jordan bloc…
Characteristic dynamics near two coalescing eigenvalues incorporating continuum threshold effects
Savannah Garmon, Gonzalo Ordonez
It has been reported in the literature that the survival probability near an exceptional point where two eigenstates coalesce should generally exhibit an evolution $P(t) \si…
Higher-order Time-Symmetry-Breaking Phase Transition due to meeting of an Exceptional Point and Fano Resonance
Satoshi Tanaka, Savannah Garmon, Kazuki Kanki +1
We have theoretically investigated the time-symmetry breaking phase transition process for two discrete states coupled with a one-dimensional continuum by solving the nonlinear eig…
Impurity-directed Transport within a Finite Disordered Lattice
Bradley Magnetta, Gonzalo Ordonez, Savannah Garmon
We consider a finite, disordered 1D quantum lattice with a side-attached impurity. We study theoretically the transport of a single electron from the impurity into the lattice, at…
Bound states, scattering states and resonant states in PT-symmetric open quantum systems
Savannah Garmon, Mariagiovanna Gianfreda, Naomichi Hatano
We study a simple open quantum system with a PT-symmetric defect potential as a prototype to illustrate general features of PT-symmetric open quantum systems; however, the potentia…
Landau-Zener transitions mediated by an environment: population transfer and energy dissipation
Amro Dodin, Savannah Garmon, Lena Simine +1
We study Landau-Zener transitions between two states with the addition of a shared discretized continuum. The continuum allows for population decay from the initial state as well a…
Gender and Sexual Diversity Issues in Physics: The Audience Speaks
Nicole Ackerman, Timothy J. Atherton, Wouter Deconinck +4
An account is presented of the special session on "Gender and Sexual Diversity Issues in Physics" which took place at the American Physical Society March Meeting 2012. The opinions…
Amplification of non-Markovian decay due to bound state absorption into continuum
Savannah Garmon, Tomio Petrosky, Lena Simine +1
It is known that quantum systems yield non-exponential (power law) decay on long time scales, associated with continuum threshold effects contributing to the survival probability f…
Analysis technique for exceptional points in open quantum systems and QPT analogy for the appearance of irreversibility
Savannah Garmon, Ingrid Rotter, Naomichi Hatano +1
We propose an analysis technique for the exceptional points (EPs) occurring in the discrete spectrum of open quantum systems (OQS), using a semi-infinite chain coupled to an endpoi…
Fano resonances and entanglement entropy
Viktor Eisler, Savannah Sterling Garmon
We study the entanglement in the ground state of a chain of free spinless fermions with a single side-coupled impurity. We find a logarithmic scaling for the entanglement entropy o…
Density of states and quantum phase transition in the thermodynamic limit of the Mermin central-spin model
Savannah Sterling Garmon, Pedro Ribeiro, Rémy Mosseri
We apply a spin-coherent states formalism to study the central-spin model with monochromatic bath and symmetric coupling (the Mermin model); in particular, we derive analytic expre…