TLS-based optimization of stark tone tuning

A computer-implemented method, comprising:

• accessing, by a device operatively coupled to a processor, a qubit topology;
• identifying, by the device and based on a set of two-level-system (TLS) frequency regions of the qubit topology, one or more Stark tone frequencies;
• applying, by the device, and to a qubit lattice corresponding to the qubit topology, one or more Stark tones that have the one or more Stark tone frequencies;
• and
• eliminating, by the device, frequency collisions in the qubit lattice such that Stark tone tuning eliminates direct frequency collisions between neighboring qubits and also eliminates TLS frequency collisions for each individual qubit.

A computer program product for facilitating TLS-based optimization of Stark tone tuning, the computer program product comprising a non-transitory computer-readable memory having program instructions embodied therewith, the program instructions executable by a processor to cause the processor to:

• access a qubit topology;
• identify, based on a set of two-level-system (TLS) frequency regions of the qubit topology, one or more Stark tone frequencies;
• apply to a qubit lattice corresponding to the qubit topology, one or more Stark tones that have the one or more Stark tone frequencies;
• and
• eliminate frequency collisions in the qubit lattice such that Stark tone tuning eliminates direct frequency collisions between neighboring qubits and also eliminates TLS frequency collisions for each individual qubit.

A device, comprising:

• a processor that executes computer-executable components stored in a computer-readable memory, the computer-executable components comprising:
• a scanning component that identifies, via qubit relaxation spectroscopy, a plurality of two-level-system (TLS) frequency regions associated with a qubit lattice, wherein the scanning component performs steps comprising:
• sweeping operational frequency values of a defined qubit through a defined range of values, by applying one or more Stark tone frequencies to the defined qubit with varying amplitudes or varying durations, and the relaxation time of the defined qubit is measured and probed for one or more of the operational frequency values;
• identifying one or more operational frequency intervals or ranges that cause the relaxation time of the defined qubit to decrease by a defined margin, wherein the relaxation time is decreased compared to another relaxation time prior to the identifying the one or more operational frequency intervals or ranges;
• and
• marking such identified ones of the one or more operational frequency intervals or ranges as one or more TLS frequency regions of the defined qubit, wherein the one or more TLS frequency regions is comprised within a set of TLS frequency regions;
• and
• an optimization component that calculates, based on the plurality of TLS frequency regions, at least one Stark tone frequency that prevents frequency collisions of the qubit lattice such that Stark tone tuning eliminates direct frequency collisions between neighboring qubits and also eliminates TLS frequency collisions for each individual qubit.

A computer-implemented method, comprising:

• identifying, by a system operatively coupled to a processor and via qubit relaxation spectroscopy, a plurality of two-level-system (TLS) frequency regions associated with a qubit lattice;
• sweeping, by the system, operational frequency values of a defined qubit through a defined range of values, by applying one or more Stark tone frequencies to the defined qubit with varying amplitudes or varying durations, and the relaxation time of the defined qubit is measured and probed for one or more of the operational frequency values;
• identifying, by the system, one or more operational frequency intervals or ranges that cause the relaxation time of the defined qubit to decrease by a defined margin, wherein the relaxation time is decreased compared to another relaxation time prior to the identifying the one or more operational frequency intervals or ranges;
• mark such identified ones of the one or more operational frequency intervals or ranges as one or more TLS frequency regions of the defined qubit, wherein the one or more TLS frequency regions is comprised within a set of TLS frequency regions;
• and
• calculate, based on the plurality of TLS frequency regions, at least one Stark tone frequency that prevents frequency collisions of the qubit lattice such that Stark tone tuning eliminates direct frequency collisions between neighboring qubits and also eliminates TLS frequency collisions for each individual qubit.