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Patent US10756683
Issued 2020-08-25
Tunable, Mechanically Stable Radio-frequency Amplifier
The disclosure describes various aspects of a tunable, mechanically stable radio-frequency (RF) amplifier. More specifically, the disclosure describes an RF amplifier designed to be tunable and mechanically stable to match and maintain stable driving of an ion trap for quantum processing applications. A precision actuator is used to finely tune the RF amplifier input in a repeatable and mechanically stable way to match the ion trap resonance. Low-loss tangent materials and torch annealing techniques are used to make the amplifier section mechanically stable.
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- 1. A radio-frequency (RF) amplifier for driving an ion trap in a quantum information processing (QIP) system, comprising:
a housing; a connector configured to receive an RF signal; a first coil coupled to the connector; a second coil inductively coupled to the first coil and configured to amplify the RF signal, and wherein the second coil provides the amplified RF signal to an output of the RF amplifier; and a precision drive coupled to the housing and configured to accurately tune a position of the first coil within the housing by enabling translation of the first coil along an axial direction of the housing, wherein the inductive coupling between the first coil and the second coil is based at least in part on the position of the first coil.
- 21. A method of using a radio-frequency (RF) amplifier for driving an ion trap in a quantum information processing (QIP) system, comprising:
identifying a tuning position value; and tuning the RF amplifier based on the tuning position value, wherein the RF amplifier includes:
a housing;
a connector configured to receive an RF signal;
a first coil coupled to the connector;
a second coil inductively coupled to the first coil and configured to amplify the RF signal, and wherein the second coil provides the amplified RF signal to an output of the RF amplifier; and
a precision drive coupled to the housing and configured to accurately tune a position of the first coil within the housing by enabling translation of the first coil along an axial direction of the housing, wherein the inductive coupling between the first coil and the second coil is based at least in part on the position of the first coil.
- 28. A system for driving an ion trap in a quantum information processing (QIP) system, comprising:
an amplifier stabilization component; and a radio-frequency (RF) amplifier including:
a housing;
a connector configured to receive an RF signal;
a first coil coupled to the connector;
a second coil inductively coupled to the first coil and configured to amplify the RF signal, and wherein the second coil provides the amplified RF signal to an output of the RF amplifier;
a precision drive coupled to the housing and configured to accurately tune a position of the first coil within the housing by enabling translation of the first coil along an axial direction of the housing, wherein the inductive coupling between the first coil and the second coil is based at least in part on the position of the first coil;
a temperature sensor;
a heater, a cooler, or a combination of a heater and a cooler; and
a voltage monitoring circuit,
wherein the amplifier stabilization component is configured to receive feedback from one or both of the temperature sensor or the voltage monitoring circuit, and to control one or both of an amplitude of the RF signal or an input to the thermoelectric cooler to stabilize an output power of the amplified RF signal.
