Heidelberg 2015 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 49: Quantum Effects: Cavity QED I

Q 49.7: Talk

Thursday, March 26, 2015, 12:45–13:00, B/gHS

Quantum nonlinear optics with an ion crystal in a cavity — •Robert Johne and Thomas Pohl — Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, 01187 Dresden, Germany

Ion crystals represent a versatile platform to engineer spin-spin interactions, which can be induced by an optical force and by common vibrational modes in the crystal [1]. Furthermore, ion-crystal cavity coupling has been realized [2]. Here, we theoretically investigate the combination of the spin-spin interaction with cavity quantum electrodynamics. Due to the spin-spin interaction in the ion crystal, the system provides a single photon nonlinearity and, at the same time, an enhanced collective light-matter coupling. The simulations show that the induced interaction blockade can be used as an efficient photon subtractor for weak probe fields. Furthermore, coherent driving allows for the generation of arbitrary Dicke states as well as their flying counterparts, n-photon Fock states, with high fidelity. The system represents a versatile platform for applications in quantum nonlinear optics.

[1] D. Porras and J. I. Cirac, Phys. Rev. Lett. 92, 207901 (2004)

[2] P. F. Herskind et al. Nature Physics 5, 494 (2009)