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Nonlinear quantum optics with phonons in an ion trap

July 5, 2018 - 3:30pm
Dzmitry Matsukevich
National University of Singapore

Nonlinear coupling between harmonic oscillators is a cornerstone model in quantum optics and quantum information science, however in most physical systems such nonlinearities are weak and hard to observe if the oscillator energies are at the level of single quanta. Here I report demonstration of strong nonlinear coupling between two and three normal modes of motion in the system of trapped ions that arises due to anharmonicity of the Coulomb interaction between the ions. I discuss several applications of these interactions, including projective measurement of the phonon number via a cross-Kerr effect and implementation of an absorption refrigerator for studies of quantum effects in thermodynamics.

PSC 2136
College Park, MD 20742