Quantum computer phase tracking and correction

A controller associated with a quantum system, the controller comprising at least one processing element and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the processing element, cause the controller to at least:

• identify a time to perform a manipulation event on a particular quantum object trapped in an ion trap based at least in part on one or more executable instructions in an executable queue to be executed by the controller, wherein the particular quantum object is identified based at least in part on a quantum object identifier extracted from at least one of the one or more executable instructions, wherein the executable queue is stored in the at least one memory, and wherein the at least one processing element activates one or more laser drivers to cause occurrence of the manipulation event;
• determine a location and transport effect on a phase of the particular quantum object based on (a) one or more locations where the particular quantum object was located for respective periods of time between a first time and the time to perform the manipulation event and respective frequencies associated with the one or locations, wherein the respective frequencies are determined via calibration, and (b) one or more transport operations performed on the particular quantum object between the first time and the time to perform the manipulation event to move the particular quantum object between respective locations of the one or more locations, wherein an immediately previous phase update for the particular quantum object occurred at the first time;
• determine a quantum operation effect on the phase of the particular quantum object based on any quantum operations applied to the particular quantum object between the first time and the time to perform the manipulation event, wherein the quantum operation effect is determined based on computing respective Stark shifts caused by respective operations of the operations applied to the particular quantum object between the first time and the time to perform the manipulation event;
• based on the location and transport effect, the quantum operation effect, and the time to perform the manipulation event, determine an interaction phase of the particular quantum object, wherein the interaction phase of the particular quantum object is a phase of the particular quantum object at the time to perform the manipulation event;
• and
• cause phases of one or more signals (a) generated by one or more lasers controlled by respective laser drivers of the one or more laser drivers and (b) corresponding to the manipulation event to be adjusted such that the phases of the one or more signals correspond to the interaction phase of the particular quantum object at the time to perform the manipulation event.

A quantum system comprising:

• an ion trap configured to confine one or more quantum objects, the one or more quantum objects comprising a particular quantum object;
• one or more lasers configured to generate one or more signals;
• one or more laser drivers configured to control operation of respective lasers of the one or more lasers;
• and
• a controller, the controller comprising at least one processing element and at least one memory including computer program code, the at least one memory and the computer program code configured to, with the processing element, cause the controller to at least:
• determine a location and transport effect on a phase of the particular quantum object based (a) one or more locations where the particular quantum object was located for respective periods of time between a first time and a time to perform a manipulation event and respective frequencies associated with the one or locations, wherein the respective frequencies are determined via calibration, and (b) one or more transport operations performed on the particular quantum object between the first time and the time to perform the manipulation event to move the particular quantum object between respective locations of the one or more locations, wherein an immediately previous phase update for the particular quantum object occurred at the first time;
• determine a quantum operation effect on the phase of the particular quantum object based on any quantum operations applied to the particular quantum object between the first time and the time to perform the manipulation event, wherein the quantum operation effect is determined based on computing respective Stark shifts caused by respective operations of the operations applied to the particular quantum object between the first time and the time to perform the manipulation event;
• based on the location and transport effect, the quantum operation effect, and the time to perform the manipulation event, determine an interaction phase of the particular quantum object;
• and
• cause phases of the one or more signals generated by the one or more lasers controlled by respective laser drivers of the one or more laser drivers to be adjusted such that the phases of the one or more signals correspond to the interaction phase of the particular quantum object at the time to perform the manipulation event.