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Exciting a Bound State in the Continuum through Multiphoton Scattering Plus Delayed Quantum Feedback.

Publication ,  Journal Article
Calajó, G; Fang, Y-LL; Baranger, HU; Ciccarello, F
Published in: Phys Rev Lett
February 22, 2019

Excitation of a bound state in the continuum (BIC) through scattering is problematic since it is by definition uncoupled. Here, we consider a type of dressed BIC and show that it can be excited in a nonlinear system through multiphoton scattering and delayed quantum feedback. The system is a semi-infinite waveguide with linear dispersion coupled to a qubit, in which a single-photon, dressed BIC is known to exist. We show that this BIC can be populated via multiphoton scattering in the non-Markovian regime, where the photon delay time (due to the qubit-mirror distance) is comparable with the qubit's decay. A similar process excites the BIC existing in an infinite waveguide coupled to two distant qubits, thus yielding stationary entanglement between the qubits. This shows, in particular, that single-photon trapping via multiphoton scattering can occur without band edge effects or cavities, the essential resource being instead the delayed quantum feedback provided by a single mirror or the emitters themselves.

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Published In

Phys Rev Lett

DOI

EISSN

1079-7114

Publication Date

February 22, 2019

Volume

122

Issue

7

Start / End Page

073601

Location

United States

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences
 

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Calajó, G., Fang, Y.-L., Baranger, H. U., & Ciccarello, F. (2019). Exciting a Bound State in the Continuum through Multiphoton Scattering Plus Delayed Quantum Feedback. Phys Rev Lett, 122(7), 073601. https://doi.org/10.1103/PhysRevLett.122.073601
Calajó, Giuseppe, Yao-Lung L. Fang, Harold U. Baranger, and Francesco Ciccarello. “Exciting a Bound State in the Continuum through Multiphoton Scattering Plus Delayed Quantum Feedback.Phys Rev Lett 122, no. 7 (February 22, 2019): 073601. https://doi.org/10.1103/PhysRevLett.122.073601.
Calajó G, Fang Y-LL, Baranger HU, Ciccarello F. Exciting a Bound State in the Continuum through Multiphoton Scattering Plus Delayed Quantum Feedback. Phys Rev Lett. 2019 Feb 22;122(7):073601.
Calajó, Giuseppe, et al. “Exciting a Bound State in the Continuum through Multiphoton Scattering Plus Delayed Quantum Feedback.Phys Rev Lett, vol. 122, no. 7, Feb. 2019, p. 073601. Pubmed, doi:10.1103/PhysRevLett.122.073601.
Calajó G, Fang Y-LL, Baranger HU, Ciccarello F. Exciting a Bound State in the Continuum through Multiphoton Scattering Plus Delayed Quantum Feedback. Phys Rev Lett. 2019 Feb 22;122(7):073601.

Published In

Phys Rev Lett

DOI

EISSN

1079-7114

Publication Date

February 22, 2019

Volume

122

Issue

7

Start / End Page

073601

Location

United States

Related Subject Headings

  • General Physics
  • 51 Physical sciences
  • 49 Mathematical sciences
  • 40 Engineering
  • 09 Engineering
  • 02 Physical Sciences
  • 01 Mathematical Sciences