| Autor: |
Fatih Dinc, Agata M. Brańczyk |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Physical Review Research, Vol 1, Iss 3, p 032042 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2643-1564 |
| DOI: |
10.1103/PhysRevResearch.1.032042 |
| Popis: |
We study non-Markovian enhancement effects in the spontaneous emission of a collective excitation in a linear chain of up to 100 qubits coupled to a one-dimensional waveguide. We find that for a critical separation of qubits, the system exhibits super-superradiant (SSR) behavior leading to collective decay stronger than the usual Dicke superradiance. Here time-delayed coherent quantum feedback effects are at play on top of the usual Dicke superradiance effects. We find a linear scaling for the SSR decay rate with increasing qubit number N such that Γ_{SSR}∼2.277Nγ_{0}, where γ_{0} is the single-emitter decay rate to a one-dimensional waveguide, as opposed to Γ_{Dicke}∼Nγ_{0} for Dicke superradiance. The SSR decay rate can be tuned with qubit separation distance and may therefore have application for quantum technologies. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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