Quantum control development and implementation interface

A method for controlling a quantum processor that implements one or more operations on multiple qubits having qubit states, the method comprising:

• generating a user interface to receive from a user of the quantum processor user input in relation to characteristics of the quantum processor;
• receiving the user input on a distributed data processing system;
• connecting to code embedded in the quantum processor to determine a first set of control parameters based on measurements in relation to the multiple qubits, control data stored with the embedded code, and calculations performed by the embedded code;
• performing calculations on the distributed data processing system based on the user input to determine a second set of control parameters;
• and
• determining on the distributed data processing system, based on the first set of control parameters and the second set of control parameters, a control sequence that, when applied to the quantum processor in the form of an electromagnetic field to directly control the qubit states, reduces decoherence and decoherence-induced errors on the one or more operations on the multiple qubits, wherein the calculations are based on noise characteristics of the quantum processor to determine a noise-suppressing control sequence, wherein the method further comprises:
• repeating the steps of determining the first set of control parameters and connecting to the distributed data processing system based on a schedule;
• repeatedly storing the first set of control parameters and the second set of control parameters on a look-up table according to the schedule;
• and
• applying the noise-suppressing control sequence to the multiple qubits by reading the first set of control parameters and the second set of control parameters from the look-up table between scheduled updating of the first set of parameters and the second set of parameters.

A method for controlling a quantum computing processor that implements one or more operations on multiple qubits having qubit states, the method comprising:

• executing code embedded into the quantum processor to:
• receive measurements in relation to the multiple qubits;
• determine a first set of control parameters based on:
• the measurements,
• control data stored with the embedded code, and
• calculations performed by the embedded code;
• connect the embedded code to a distributed data processing system to cause the distributed data processing system to determine a second set of control parameters based on calculations performed by the distributed data processing system and based on noise characteristics of the quantum processor to allow determination of a noise-suppressing control sequence;
• and
• determine based on the first set of parameters and the second set of parameters the noise-suppressing control sequence that, when applied to the quantum processor in the form of an electromagnetic field to directly control the qubit states, reduces decoherence and decoherence-induced errors on the one or more operations on the multiple qubits, wherein the method further comprises executing code embedded into the quantum processor to:
• repeat the steps of determining the first set of control parameters and connecting to the distributed data processing system based on a schedule;
• repeatedly store the first set of control parameters and the second set of control parameters on a look-up table according to the schedule;
• and
• apply the noise-suppressing control sequence to the multiple qubits by reading the first set of control parameters and the second set of control parameters from the look-up table between scheduled updating of the first set of parameters and the second set of parameters.

A quantum processor comprising:

• multiple qubits having respective qubit state vectors configured to implement one or more operations on the multiple qubits;
• code embedded into the quantum processor to perform the following steps when executed:
• receive measurements in relation to the multiple qubits;
• determine a first set of control parameters based on:
• the measurements,
• control data stored with the embedded code, and
• calculations performed by the embedded code;
• connect the embedded code to a distributed data processing system to cause the distributed data processing system to determine a second set of control parameters based on calculations performed by the distributed data processing system and based on noise characteristics of the quantum processor to allow determination of a noise-suppressing control sequence;
• and
• determine based on the first set of parameters and the second set of parameters the noise-suppressing control sequence;
• and
• a controlled source to apply the noise-suppressing control sequence to the quantum processor in the form of an electromagnetic field to directly control the qubit state vectors to reduce decoherence and decoherence-induced errors on the one or more operations on the multiple qubits, wherein the code embedded into the quantum processor is further configured to perform the following steps when executed:
• repeat the steps of determining the first set of control parameters and connecting to the distributed data processing system based on a schedule;
• repeatedly store the first set of control parameters and the second set of control parameters on a look-up table according to the schedule;
• and
• apply the noise-suppressing control sequence to the multiple qubits by reading the first set of control parameters and the second set of control parameters from the look-up table between scheduled updating of the first set of parameters and the second set of parameters.