Integrated drive and readout circuit for superconducting qubits

A method of forming an integrated drive and readout circuit assembly, the method comprising:

• providing directional couplers configured to connect to qubit-resonator systems;
• coupling diplexers to the directional couplers;
• and
• coupling a microwave signal combiner to the diplexers.

A chip comprising:

• directional couplers configured to connect to qubit-resonator systems;
• diplexers coupled to the directional couplers;
• and
• a microwave signal combiner coupled to the diplexers.

A method of driving qubit-resonator systems, the method comprising:

• transmitting, by directional couplers, microwave signals to the qubit-resonator systems;
• receiving back, by the directional couplers, the microwave signals having been reflected from the qubit-resonator systems;
• and
• receiving, by diplexers, the microwave signals from the directional couplers, wherein the diplexers are configured to direct the microwave signals to a termination.

A method of reading out qubit-resonator systems, the method comprising:

• transmitting, by directional couplers, microwave signals to the qubit-resonator systems;
• receiving back, by the directional couplers, the microwave signals having been reflected from the qubit-resonator systems;
• receiving, by diplexers, the microwave signals from the directional couplers;
• receiving, by a microwave signal combiner, the microwave signals from the diplexers, wherein the microwave signal combiner is configured to combine the microwave signals into combined microwave signals;
• and
• transmitting, by the microwave signal combiner, the combined microwave signals to a quantum-limited amplifier.