CQuIC Seminars
Controlling trapped ions without lasers
Presented by Daniel Schlichter, NIST
A VIRTUAL AMO SEMINAR presented in a Zoom meeting vetted by CQuIC. See https://sites.google.com/stanford.edu/virtual-amo-seminar/schedule for the meeting link. Trapped atomic ions are a leading platform for quantum computing and sensing experiments. These experiments require manipulation of the ions' quantum states and the creation of entanglement between ions, both of which are typically accomplished using laser beams. However, there are drawbacks to this approach, including errors due to photon scattering and the complexity of the required laser sources. Our group performs quantum state control using oscillating radiofrequency and microwave-frequency magnetic and electric fields, and their near-field gradients, instead of laser beams. A critical element is the use of a microfabricated surface-electrode ion trap, which holds the ions roughly 30 µm above the electrodes generating the control fields. We use low-power resonant laser beams for cooling, optical pumping, and readout. I will describe several of our recent results, including the creation of high-fidelity entangled states of two ions using only microwave and radio-frequency control fields, and the use of radio-frequency electric fields to generate squeezed states of ion motion for sensing applications and to amplify phonon-mediated ion-ion interactions.
1:00 pm, Friday, April 24, 2020
TBD,
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