Operating a multi-dimensional array of qubit devices

A quantum computing method comprising:

• receiving qubit control signals in a multi-dimensional array of qubit devices, each qubit device having a respective qubit operating frequency that is independent of an offset electromagnetic field experienced by the qubit device, the qubit control signal received by each qubit device being configured to manipulate a quantum state of the qubit device;
• and
• receiving coupler control signals at coupler devices, the coupler devices residing at intervals between neighboring pairs of the qubit devices in the multi-dimensional array, the coupler control signal received by each coupler device being configured to produce an electromagnetic interaction between the neighboring pair of qubit devices that the coupler device resides between, a coupling strength of the electromagnetic interaction produced by each coupler device being influenced by an offset electromagnetic field experienced by the coupler device,
• wherein each of the coupler devices has a respective coupler operating frequency that varies with the offset electromagnetic field experienced by the coupler device, and the coupling strength varies according to the coupler operating frequency,
• wherein each of the neighboring pairs of qubit devices comprises a first qubit device having a first qubit operating frequency and a second qubit device having a second, distinct qubit operating frequency,
• wherein the coupler control signals each comprise a DC component and an AC component, and the AC component drives the coupler device at a drive frequency that corresponds to a sum or difference of the first qubit operating frequency and the second qubit operating frequency.

A quantum computing system comprising:

• a multi-dimensional array of qubit devices, each qubit device having a respective qubit operating frequency that is independent of an offset electromagnetic field experienced by the qubit device;
• and
• readout devices associated with the multi-dimensional array of qubit devices, each readout device operably coupled to a single, respective qubit device and configured to produce a qubit readout signal that indicates a state of the respective qubit device,
• wherein the qubit devices have respective qubit operating frequencies in a frequency band, and the readout devices have respective readout frequencies that are interleaved between the qubit operating frequencies in the frequency band.

A quantum computing system of comprising:

• a multi-dimensional array of qubit devices, each qubit device having a respective qubit operating frequency that is independent of an offset electromagnetic field experienced by the qubit device;
• and
• readout devices associated with the multi-dimensional array of qubit devices, each readout device operably coupled to a single, respective qubit device and configured to produce a qubit readout signal that indicates a state of the respective qubit device,
• wherein each of the readout devices is capacitively coupled to the single, respective qubit device.

A quantum computing method comprising:

• receiving qubit control signals in a multi-dimensional array of qubit devices, each qubit device having a respective qubit operating frequency that is independent of an offset electromagnetic field experienced by the qubit device, the qubit control signal received by each qubit device being configured to manipulate a quantum state of the qubit device;
• and
• producing qubit readout signals at readout devices associated with the multi-dimensional array of qubit devices, each readout device operably coupled to a single, respective qubit device, each qubit readout signal produced by one of the readout devices based on an electromagnetic interaction between the readout device and the respective qubit device,
• wherein each qubit device has two or more nearest-neighbor qubit devices in the multi-dimensional array, and the qubit operating frequency of each qubit device is distinct from the respective qubit operating frequencies of each nearest-neighbor qubit device.

A quantum computing method of comprising:

• receiving qubit control signals in a multi-dimensional array of qubit devices, each qubit device having a respective qubit operating frequency that is independent of an offset electromagnetic field experienced by the qubit device, the qubit control signal received by each qubit device being configured to manipulate a quantum state of the qubit device;
• and
• producing qubit readout signals at readout devices associated with the multi-dimensional array of qubit devices, each readout device operably coupled to a single, respective qubit device, each qubit readout signal produced by one of the readout devices based on an electromagnetic interaction between the readout device and the respective qubit device,
• wherein each readout device has two or more nearest-neighbor readout devices, and a readout frequency of each readout device is distinct from respective readout frequencies of each nearest-neighbor readout device.