Techniques for Microwave Near-Field Quantum Control of Trapped Ions
MASSACHUSETTS INST OF TECH CAMBRIDGE OFFICE OF SPONSORED RESEARCH
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Microwave near-field quantum control of spin and motional degrees of freedom of 25Mg ions can be used to generate two-ion entanglement, as recently demonstrated in Ospelkaus et al. Nature 476, 181 2011. Here, we describe additional details of the setup and calibration procedures for these experiments. We discuss the design and characteristics of the surface-electrode trap and the microwave system and compare experimental measurements of the microwave near fields with numerical simulations. Additionally, we present a method that utilizes oscillatingmagnetic-field gradients to detect micromotion induced by the ponderomotive radio-frequency potential in linear traps. Finally, we discuss the present limitations of microwave-driven two-ion entangling gates in our system.
- Electricity and Magnetism
- Quantum Theory and Relativity
- Radiofrequency Wave Propagation