Optical simulation of atomic decay enhancement and suppression
| Autor: | F. H. Maldonado-Villamizar, B. M. Rodríguez-Lara, B. Jaramillo-Ávila |
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| Rok vydání: | 2020 |
| Předmět: |
Physics
Gaussian FOS: Physical sciences Coupled mode theory 01 natural sciences 010305 fluids & plasmas law.invention Computational physics Coupling (physics) symbols.namesake Probability amplitude law 0103 physical sciences symbols Born approximation 010306 general physics Waveguide Radioactive decay Harmonic oscillator Optics (physics.optics) Physics - Optics |
| Zdroj: | Physical Review A. 102 |
| ISSN: | 2469-9934 2469-9926 |
| DOI: | 10.1103/physreva.102.053501 |
| Popis: | We discuss the decay of a two-level system into an engineered reservoir of coupled harmonic oscillators in the single-excitation manifold and propose its optical simulation with an homogeneous chain of coupled waveguides where individual elements couple to an external waveguide. We use two approaches to study the decay of the optical analogue for the probability amplitude of the two-level system being in the excited state. A Born approximation allows us to provide analytic closed-form amplitudes valid for small propagation distances. A Fourier-Laplace approach allows us to estimate an effective decay rate valid for long propagation distances. In general, our two analytic approximations match our numerical simulations using coupled mode theory and show non-Markovian decay into the engineered reservoir. In particular, we focus on two examples that provide enhancement or suppression of the decay decay rate using flat-top or Gaussian coupling distributions. 17 pages, 8 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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