Compiling on interconnected qubit subsystems

A computer system comprising a processor and a non-transitory computer-readable storage computer unit, the computer system configured to compile a quantum circuit on a plurality of qubit subsystems interconnected by one or more junctions therebetween, the storage unit comprising instructions to:

• identify a total number of qubits submitted to a specific quantum circuit, whereby the total number of qubits exceeds a defined threshold, the threshold being a maximum number of qubits available for processing in any one subsystem of a plurality of interconnected qubit subsystems;
• compile a first section of the specific quantum circuit on a first qubit subsystem of the plurality of interconnected qubit subsystems by successively selecting quantum gates from the specific quantum circuit;
• wherein if a selected quantum gate is to be applied to qubits assigned to different qubit subsystems, code the passing of a qubit from the first qubit subsystem to a second qubit subsystem of the plurality of interconnected qubit subsystems through a junction connecting the first qubit subsystem to the second qubit subsystem;
• and
• compile a second section of the specific quantum circuit on the second qubit subsystem.

A non-transitory computer-readable storage medium comprising instructions executable by a processor for compiling a quantum circuit on a plurality of qubit subsystems interconnected by one or more junctions therebetween, the computer-readable storage medium comprising:

• instructions to identify a total number of qubits submitted to a specific quantum circuit, whereby the total number of qubits exceeds a threshold, the threshold being a maximum number of qubits available for processing in any one subsystem of a plurality of interconnected qubit subsystems;
• instructions to compile a first section of the specific quantum circuit on a first qubit subsystem of the plurality of interconnected qubit subsystems by successively selecting quantum gates from the specific quantum circuit;
• instructions to, if a selected quantum gate is to be applied to qubits assigned to different qubit subsystems, code the passing of a qubit from the first qubit subsystem to a second qubit subsystem of the plurality of interconnected qubit subsystems through a junction connecting the first qubit subsystem to the second qubit subsystem;
• and
• instructions to compile a second section of the specific quantum circuit on the second qubit subsystem.