Compact radio-frequency resonator for cryogenic ion traps

Area of Science:

• Physics
• Electrical Engineering
• Quantum Information Science

Background:

• Ion traps are crucial for quantum computing and precision measurements.
• Operating ion traps at cryogenic temperatures reduces noise and improves coherence.
• Existing radio-frequency (RF) resonators often struggle with power dissipation and voltage gain in cryogenic environments.

Purpose of the Study:

• To design and implement a lumped-component RF resonator for driving ion traps.
• To achieve high voltage gain with minimal power dissipation in a cryogenic vacuum.
• To demonstrate the resonator's functionality by successfully trapping single ions.

Main Methods:

• Investigation and implementation of a lumped-component RF resonator.
• Operation within a cryogenic vacuum environment at 5.7 K.
• Measurement of voltage gain, power dissipation, operating frequency, and Q factor.
• Confining single (40)Ca(+) ions in an ion trap driven by the resonator.

Main Results:

• Achieved a voltage gain of 100 for an input voltage of 1.35 V.
• Measured minimal power dissipation of only 18 mW.
• Resonator operated at 7.64 MHz with a Q factor of 700.
• Successfully confined single (40)Ca(+) ions, validating the resonator's low-temperature performance.

Conclusions:

• The developed RF resonator is effective for driving ion traps in cryogenic vacuum environments.
• The design meets the requirements for high voltage gain and low power consumption.
• This work provides a viable solution for low-temperature ion trapping systems.