Parametric amplifier
AssigneeNewSouth Innovations Pty Limited
InventorMatthew G. House
Life of this patent
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Abstract
The present disclosure relates to parametric amplifiers that can be used in the presence of a magnetic field. In particular the present disclosure relates to an integrated signal amplifier that comprises: a quantum dot; a first conductive electrode arranged in a manner such that tunnelling of electrons to the quantum dot is prevented; and a second conductive electrode arranged in a manner such tunnelling of electrons to the quantum dot is permitted. When an oscillating signal is applied across the first and second electrodes, the equivalent capacitance across the first and the second electrodes oscillates at the frequency of the oscillating signal.
Claims20
An integrated signal amplifier comprising:
- a quantum dot;
- a first conductive electrode configured to prevent tunnelling of electrons to the quantum dot;
- and
- a second conductive electrode configured to permit tunnelling of electrons to the quantum dot;
- wherein, the first and second electrodes are configured to have an equivalent capacitance across them oscillating at a frequency when an oscillating signal is applied across the first and second electrodes, wherein the frequency is a frequency of the oscillating signal.
An apparatus for amplifying a readout signal from a quantum bit, the apparatus comprising:
- a signal amplifier comprising:
- a quantum dot;
- a first conductive electrode configured to prevent tunnelling of electrons to the quantum dot, and
- a second conductive electrode configured to permit tunnelling of electrons to the quantum dot,
- wherein, the first and second electrodes are configured to have an equivalent capacitance across them oscillating at a frequency when an oscillating signal is applied across the first and second electrodes, wherein the frequency is a frequency of the oscillating signal,
- wherein the second conductive electrode is arranged to receive a readout signal from the quantum bit and an amplified version of the readout signal is generated across the first and the second electrodes.
Dependencies are inferred from the claim text.