Related papers: Collective radiation from distant emitters

Collective radiation from distant emitters

URL: http://arxiv.org/abs/2006.12569v1
Date: Mon, 22 Jun 2020 19:03:52 GMT
Title: Collective radiation from distant emitters
Authors: Kanu Sinha, Alejandro Gonz\'alez-Tudela, Yong Lu, Pablo Solano
Abstract summary: We show that the spectrum of the radiated field exhibits non-Markovian features such as linewidth broadening beyond standard superradiance. We discuss a proof-of-concept implementation of our results in a superconducting circuit platform.
Score: 63.391402501241195
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Waveguides allow for direct coupling of emitters separated by large distances, offering a path to connect remote quantum systems. However, when facing the distances needed for practical applications, retardation effects due to the finite speed of light are often overlooked. Previous works studied the non-Markovian dynamics of emitters with retardation, but the properties of the radiated field remain mostly unexplored. By considering a toy model of two distant two-level atoms coupled through a waveguide, we observe that the spectrum of the radiated field exhibits non-Markovian features such as linewidth broadening beyond standard superradiance, or narrow Fano resonance-like peaks. We also show that the dipole-dipole interaction decays exponentially with distance as a result of retardation, with the range determined by the atomic linewidth. We discuss a proof-of-concept implementation of our results in a superconducting circuit platform.

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