All-Optical, High-Fidelity Polarization Gate Using Room-Temperature Atomic Vapor
Abstract
An all-optical atomic Controlled-NOT (CNOT)/polarization gate operation is demonstrated with low light intensities in a room-temperature atomic medium. Using a Polarization-Selective-Kerr-Phase-Shift (PSKPS) technique, a $\pi$ phase shift is written to only one of the two circularly-polarized components of a linearly-polarized input signal field by a weak phase-control field with "magic" detuning. At the exit of the medium, the signal field maintains its original strength but acquires a 90$^{\rm o}$ linear polarization rotation, demonstrating the first fast, high-fidelity CNOT/polarization gate operation in a room-temperature atomic medium. This development opens the realm of possibilities for potential future extremely low light level telecommunication and information processing systems.
- Publication:
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arXiv e-prints
- Pub Date:
- July 2014
- DOI:
- 10.48550/arXiv.1407.1126
- arXiv:
- arXiv:1407.1126
- Bibcode:
- 2014arXiv1407.1126L
- Keywords:
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- Physics - Optics
- E-Print:
- 6 pages, 6 figures