Abstract
We study the interaction between a single two-level atom and a single-photon probe pulse in a guided mode of a nanofiber. We examine the situation of chiral interaction, where the atom has a dipole rotating in the meridional plane of the nanofiber, and the probe pulse is quasilinearly polarized along the radial direction of the atom position in the fiber transverse plane. We show that the atomic excitation probability, the photon transmission flux, and the photon transmission probability depend on the propagation direction of the probe pulse along the fiber axis. In contrast, the reflection flux and the reflection probability do not depend on the propagation direction of the probe pulse. We find that the asymmetry parameter for the atomic excitation probability does not vary in time and does not depend on the probe pulse shape.
Highlights
The manipulation and control of coupling between light and matter at a single quantum level lie at the heart of quantum optics and quantum information processing and have received a lot of attention in the past [1,2,3,4]
It has been shown that the transient excitation probability of a single two-level atom interacting with a quantized single-photon pulse can achieve higher values than that in the steady-state regime
The purpose of this paper is to study the chiral interaction between a single two-level atom and a quantized singlephoton probe pulse in a guided mode of a nanofiber
Summary
The manipulation and control of coupling between light and matter at a single quantum level lie at the heart of quantum optics and quantum information processing and have received a lot of attention in the past [1,2,3,4]. It has been predicted that the excitation probability of the atom can, in principle, approach unity if the photon waveform matches both spatially and temporally the time-reversed version of a spontaneously emitted photon [6,7,8,9]. This condition means that the spatial profile of the incident photon should match the atomic dipole emission pattern and that the temporal shape of the incident photon should be a rising exponential [6,7,8,9]. Experiments on the use of rising exponential pulses for efficient atomic excitation, photon absorption, and loading of photons into a cavity at a single quantum level have been reported [18,19,20,21,22]
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