Non-markovian collective dynamics of waveguide-coupled atoms
ORAL · Invited
Abstract
As waveguides couple atoms at long distances, the memory effects of the electromagnetic environment become pronounced in the presence of retardation, rendering the system dynamics non-Markovian. Such waveguide-coupled atoms can exhibit surprisingly rich non-Markovian dynamics, with collective spontaneous emission rates exceeding those of Dicke superradiance ('superduperradiance') and formation of delocalized atom-photon bound states. In this talk, I will discuss the advantages of such non-Markovian dynamics towards sensing field distributions. As a spatially varying field influences the atoms (e.g., by inducing a relative frequency detuning in the atomic transitions), we demonstrate that time-delayed feedback can enhance the quantum Fisher information associated with field gradient sensing. Our results present a new avenue for atom-based gradiometric sensors, utilizing non-Markovian features of the environment for enhanced magnetometry and gravity gradiometry.
*We acknowledge support from the National Science Foundation under Grant No. PHY-2309341, Air Force Office of Scientific Research under Award No. FA9550- 25-1-0333, the John Templeton Foundation Award No. 63626 and U.S. Department of Energy, Office of Science under Grant No. DESC0026059.
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Publication: [1] K. Sinha, P. Meystre, E. A. Goldschmidt, F. Fatemi, S. L. Rolston, P. Solano, Phys. Rev. Lett. 124, 043603 (2020)
[2] K. Sinha, A. G. Tudela, Y. Lu, P. Solano, Phys. Rev. A 102, 043718 (2020)
[3] K.Sinha, J. Parra-Contreras, A. Das, P. Solano, N. J. Phys. 27, 054101 (2025)
[4] A. Das, P. Solano, K. Sinha, Phys. Rev. A 112, 043723 (2025)
[5] P. Dhara, I. Chavez-Padilla, A. Das, S. Guha, K. Sinha, In preparation
Presenters
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Kanu Sinha
- University of Arizona