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Sci Rep. 2018 Oct 3;8(1):14740. doi: 10.1038/s41598-018-32989-9.

Creating a switchable optical cavity with controllable quantum-state mapping between two modes.

Author information

1
Faculty of Physics, Adam Mickiewicz University, PL-61-614, Poznań, Poland. chimczak@amu.edu.pl.
2
Faculty of Physics, Adam Mickiewicz University, PL-61-614, Poznań, Poland.
3
RCPTM, Joint Laboratory of Optics of Palacký University and Institute of Physics of Academy of Sciences of the Czech Republic, 17. listopadu 12, 772 07, Olomouc, Czech Republic.
4
National Centre for Nanotechnology and Advanced Materials, KACST, P.O. Box 6086, Riyadh, 11442, Saudi Arabia.
5
Quantum Optics and Engineering Division, Institute of Physics, University of Zielona Góra, Szafrana 4a, Zielona Góra, 65-516, Poland.

Abstract

We describe how an ensemble of four-level atoms in the diamond-type configuration can be applied to create a fully controllable effective coupling between two cavity modes. The diamond-type configuration allows one to use a bimodal cavity that supports modes of different frequencies or different circular polarisations, because each mode is coupled only to its own transition. This system can be used for mapping a quantum state of one cavity mode onto the other mode on demand. Additionally, it can serve as a fast opening high-Q cavity system that can be easily and coherently controlled with laser fields.

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