Applications of a superconducting device that mixes surface acoustic waves and microwave signals

A method, comprising:

• receiving, at a frequency converter, and from a superconducting surface acoustic wave resonator, a surface acoustic wave signal that comprises one or more phonons that resonate at a first frequency;
• receiving, at the frequency converter and from a superconducting microwave resonator, a microwave signal that comprises one or more photons that resonate at a second frequency;
• and
• implementing, by the frequency converter, a lossless frequency conversion between first information of the superconducting surface acoustic wave resonator and second information of the superconducting microwave resonator based on a pump signal received from a microwave source.

A method, comprising:

• inputting, by an entanglement component, a first input signal that comprises a first frequency into a superconducting surface acoustic wave resonator, wherein a first qubit is operatively coupled to the entanglement component via the superconducting surface acoustic wave resonator;
• inputting, by the entanglement component a second input signal that comprises a second frequency into a superconducting microwave resonator, wherein a second qubit is operatively coupled to the entanglement component via the superconducting microwave resonator;
• and
• outputting, by the entanglement component, an output signal that comprises an entangled signal that comprises an amplified superposition of input fields entering the superconducting surface acoustic wave resonator and the superconducting microwave resonator.

A superconducting device, comprising:

• a first superconducting qubit capacitively coupled to a superconducting surface acoustic wave resonator;
• a second superconducting qubit capacitively coupled to a superconducting microwave resonator;
• and
• a Josephson ring modulator coupled to the superconducting surface acoustic wave resonator and the superconducting microwave resonator.