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EnglishExcitation 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.
Giuseppe Calajó, Y.L.F. (2019). Exciting a Bound State in the Continuum through Multiphoton Scattering Plus Delayed Quantum Feedback. PHYSICAL REVIEW LETTERS, 122.
| Data di pubblicazione: | 2019 |
| Titolo: | Exciting a Bound State in the Continuum through Multiphoton Scattering Plus Delayed Quantum Feedback |
| Autori: | |
| Citazione: | Giuseppe Calajó, Y.L.F. (2019). Exciting a Bound State in the Continuum through Multiphoton Scattering Plus Delayed Quantum Feedback. PHYSICAL REVIEW LETTERS, 122. |
| Rivista: | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevLett.122.073601 |
| Abstract: | 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. |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
File in questo prodotto:
| File | Descrizione | Tipologia | Licenza | |
|---|---|---|---|---|
| PRL BIC.pdf | Articolo principale | N/A | Open Access Visualizza/Apri |
http://hdl.handle.net/10447/349795
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