Oscillating bound states for a giant atom
Artikel i vetenskaplig tidskrift, 2020

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.


Lingzhen Guo


Anton Frisk Kockum

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Florian Marquardt


Friedrich-Alexander-Universität Erlangen Nurnberg (FAU)

Göran Johansson

Chalmers, Mikroteknologi och nanovetenskap, Tillämpad kvantfysik

Physical Review Research

26431564 (ISSN)

Vol. 2 4 043014

Stora atomer - en ny regim för kvantoptik

Vetenskapsrådet (VR) (2019-03696), 2020-01-01 -- 2023-12-31.


Atom- och molekylfysik och optik

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