On the role of chirping in pulsed single photon spectroscopy

• URL: http://arxiv.org/abs/2405.02723v1
• Date: Sat, 4 May 2024 17:46:11 GMT
• Title: On the role of chirping in pulsed single photon spectroscopy
• Authors: Elnaz Darsheshdar, Aiman Khan, Francesco Albarelli, Animesh Datta,
• Abstract summary: We investigate the precision of estimating the interaction strength between a two-level system and a single-photon pulse when the latter is subject to chirping. We show that experimentally feasible measurements are optimal, or close to it, for chirped, pulsed single photon spectroscopy.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We investigate the precision of estimating the interaction strength between a two-level system (TLS) and a single-photon pulse when the latter is subject to chirping. We consider linear, quadratic, and sinusoidal temporal phases applied to Gaussian and exponential temporal profiles. At the asymptotic time, when the TLS has fully decayed to its ground state, the fundamental precision depends solely on the magnitude of its spectral amplitude. For quadratically phase-modulated Gaussian pulses, this is entirely determined by the spectral bandwidth. We provide expressions for evaluating the fundamental precision for general temporal profiles and phase modulations. Finally, we show that experimentally feasible mode-resolved measurements are optimal, or close to it, for chirped, pulsed single photon spectroscopy.

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