Cryogenic integrated circuit, integrated module, and arrangement for producing and detecting excitation and readout signals of qubits

A system for generating excitation signals for qubits in a cryogenically cooled environment, the system comprising:

• at least one cryogenic integrated circuit or integrated module that is located within the cryogenically cooled environment;
• a waveform generator that is located outside the cryogenically cooled environment;
• and
• a signal line connected to the waveform generator and a signal input of the cryogenic integrated circuit or integrated module,
• wherein the cryogenic integrated circuit or integrated module includes:
• an amplifier including a travelling wave parametric amplifier or a Josephson parametric amplifier, the amplifier comprising at least one amplifier input and an amplifier output;
• an oscillator configured to produce an oscillating drive signal, the oscillator connected to the at least one amplifier input for providing the oscillating drive signal into the amplifier;
• the signal input configured to couple input signals into the amplifier through the at least one amplifier input;
• a biasing input configured to couple biasing signals into the oscillator;
• and
• a signal output configured to convey output signals from the amplifier output out of the cryogenic integrated circuit or integrated module.

A system for extracting qubit output signals from a quantum computing system located in a cryogenically cooled environment, the system comprising:

• at least one cryogenic integrated circuit or integrated module within the cryogenically cooled environment;
• a coupling from the quantum computing system into a signal input of the cryogenic integrated circuit or integrated module;
• and
• a signal line connected to a signal output of the cryogenic integrated circuit or integrated module through a cryogenic preamplifier to a processing system outside the cryogenically cooled environment,
• wherein the cryogenic integrated circuit or integrated module comprises:
• an amplifier including a travelling wave parametric amplifier or a Josephson parametric amplifier, the amplifier comprising at least one amplifier input and an amplifier output;
• an oscillator configured to produce an oscillating drive signal, the oscillator connected to the at least one amplifier input for providing the oscillating drive signal into the amplifier;
• the signal input configured to couple input signals into the amplifier through the at least one amplifier input;
• a biasing input configured to couple biasing signals into the oscillator;
• and
• the signal output configured to convey output signals from the amplifier output out of the cryogenic integrated circuit or integrated module.