Oscillating bound states for a giant atom

Guo L, Kockum AF, Marquardt F, Johansson G (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Physical Review Research American Physical Society

Book Volume: 2

Journal Issue: 4

DOI: 10.1103/PhysRevResearch.2.043014

Abstract

We investigate the relaxation dynamics of a single artificial atom interacting, via multiple coupling points, with a continuum of bosonic modes (photons or phonons) in a one-dimensional waveguide. In the nonMarkovian regime, where the traveling time of a photon or phonon between the coupling points is sufficiently large compared to the inverse of the bare relaxation rate of the atom, we find that a boson can be trapped and form a stable bound state. As a key discovery, we further find that a persistently oscillating bound state can appear inside the continuous spectrum of the waveguide if the number of coupling points is more than two since such a setup enables multiple bound modes to coexist. This opens up prospects for storing and manipulating quantum information in larger Hilbert spaces than available in previously known bound states.

Authors with CRIS profile

Florian Marquardt Lehrstuhl für Theoretische Physik

Involved external institutions

Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light

Germany (DE) Chalmers University of Technology / Chalmers tekniska högskola

Sweden (SE)

How to cite

APA:

Guo, L., Kockum, A.F., Marquardt, F., & Johansson, G. (2020). Oscillating bound states for a giant atom. Physical Review Research, 2(4). https://doi.org/10.1103/PhysRevResearch.2.043014

MLA:

Guo, Lingzhen, et al. "Oscillating bound states for a giant atom." Physical Review Research 2.4 (2020).

BibTeX: Download