Perfect excitation of a matter qubit by a single photon in free space

Stobinska, M.; Alber, G.; Leuchs, G.

doi:10.1209/0295-5075/86/14007

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学術論文

Perfect excitation of a matter qubit by a single photon in free space

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Stobinska, M.
Optics Theory Group, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Leuchs, G.
Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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引用

Stobinska, M., Alber, G., & Leuchs, G. (2009). Perfect excitation of a matter qubit by a single photon in free space. EPL, 86(1):. doi:10.1209/0295-5075/86/14007.

引用: https://hdl.handle.net/11858/00-001M-0000-002D-6BF3-D

要旨

We propose a scheme for perfect excitation of a single two-level atom by a single photon in free space. The photon state has to match the time reversed photon state originating from spontaneous decay of a two-level system. Here, we discuss its experimental preparation. The state is characterized by a particular asymmetric exponentially shaped temporal profile. Any deviations from this ideal state limit the maximum absorption. Although perfect excitation requires an infinite amount of time, we demonstrate that there is a class of initial one-photon quantum states which can achieve almost perfect absorption even for a finite interaction time. Our results pave the way for realizing perfect coupling between flying and stationary qubits in free space thus opening a possibility for building scalable quantum networks. Copyright (C) EPLA, 2009