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Physical Review A

Full inversion of a two-level atom with a single-photon pulse in one-dimensional geometries

Eden Rephaeli, Jung‐Tsung Shen, Shanhui Fan

Published Sep 8, 2010• 76 citations
Publisher

Abstract

We analyze a system comprising a one-dimensional single-mode waveguide (a) coupled directly to a two-level atom (b) side-coupled to a cavity containing a two-level atom and show that in both cases it is possible to invert the atom with a single-photon pulse. In contrast to the semiclassical $\ensuremath{\pi}$ pulse, the inverting single-photon pulse is unique.

DOI
10.1103/physreva.82.033804

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Publisher’s Note: Full inversion of a two-level atom with a single-photon pulse in one-dimensional geometries [Phys. Rev. A82, 033804 (2010)]

Eden Rephaeli, Jung‐Tsung Shen, Shanhui Fan

Received 24 September 2010DOI:https://doi.org/10.1103/PhysRevA.82.039904©2010 American Physical Society

Physical Review A•Sep 30, 2010•2 citations
We analyze a system comprising a one-dimensional single-mode waveguide (a) coupled directly to a two-level atom (b) side-coupled to a cavity containing a two-level atom and show that in both cases it is possible to invert the atom with a single-photon pulse. In contrast to the semiclassical \ensuremathπ\ensuremath{\pi}\ensuremathπ pulse, the inverting single-photon pulse is unique.
The single-photon transport in a single-mode waveguide, coupled to a cavity embedded with a two-level atom, is analyzed. The single-photon transmission and reflection amplitudes, as well as the cavity and the atom excitation amplitudes, are solved exactly via a real-space approach. It is shown that the dissipations of the cavity and of the atom, respectively, affect distinctively on the transport properties of the photons and on the relative phase between the excitation amplitudes of the cavity mode and the atom.
We study the transmission and reflection properties of a single-photon pulse in a one-dimensional waveguide side coupled with a Jaynes-Cummings system, namely, a multi-cavity with an embedded Rydberg atom. A Single-photon pulse is applied to tune the atoms energy spectrum, and varying it can bring the atomic qubit transition on or off-resonance for the cavity. The transmission and reflection behavior are systematically explored by a real-space model Hamiltonian and we find that the coupling strength between the waveguide and the side optical cavity exerts a tremendous impact on it. The influence of cavity and atomic dissipations and the incident pulse width on the transport properties of the single-photon is also investigated simultaneously. Based on these phenomena, we point out the possibility of utilizing this system as a single-photon transport in practice and has potential applications in quantum information.
We study controllable single-photon transport in a one-dimensional waveguide with a nonlinear dispersion relation coupled to a three-level emitter in a cascade configuration. An extra cavity field is introduced to drive one of the level transitions of the emitter. In the resonance case, when the extra cavity does not contain photons, the input single photon will be reflected; when the cavity contains one photon, the full transmission of the input single photon can be obtained. In the off-resonance case, the single-photon transport can also be controlled by the parameters of the cavity. Therefore, we show that single-photon transport can be controlled by an extra cavity field.