Methods and apparatuses for micromotion compensation with displaced beam
AssigneeIonQ, Inc.
InventorsMichael GOLDMAN, Adam WEST
Life of this patent
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Abstract
Aspects of the present disclosure may include a method and/or a system for identifying an ion chain having a plurality of trapped ions, selecting at least two non-consecutive trapped ions in the ion chain for implementing a qubit, applying at least a first Raman beam to shuttle at least one neighbor ion of the at least two non-consecutive trapped ions from a ground state to a metastable state, and applying at least a second Raman beam to one or more of the at least two non-consecutive trapped ions, after shuttling the at least one neighbor ion to the metastable state, to transition from a first manifold to a second manifold.
Claims15
A method of identifying micromotion in a quantum information processing (QIP) system, comprising:
- generating a Raman beam having a plurality of points associated with an intensity profile decreasing radially from at least a center point of the Raman beam;
- applying the Raman beam to a dual space single species (DSSS) trapped ion such that the DSSS trapped ion overlaps with a point of the plurality of points, wherein the point is not the center point of the Raman beam;
- applying a radio frequency (RF) field to the DSSS trapped ion to trap the DSSS trapped ion;
- applying a plurality of compensation fields to the DSSS trapped ion;
- measuring a plurality of micromotions of the DSSS trapped ion, wherein each respective micromotion is associated with a respective compensation field of the plurality of compensation fields;
- identifying at least one minimum micromotion of the plurality of micromotions;
- and
- identifying at least one compensation field that induces the at least one minimum micromotion.
A non-transitory computer readable medium having instructions stored therein that, when executed by one or more processors of a quantum information processing (QIP) system, cause the one or more processors to:
- generate a Raman beam having a plurality of points associated with an intensity profile decreasing radially from at least a center point of the Raman beam;
- apply the Raman beam to a dual space single species (DSSS) trapped ion such that the DSSS trapped ion overlaps with a point of the plurality of points, wherein the point is not the center point of the Raman beam;
- apply a radio frequency (RF) field to the DSSS trapped ion to trap the DSSS trapped ion;
- apply a plurality of compensation fields to the DSSS trapped ion;
- measure a plurality of micromotions of the DSSS trapped ion, wherein each respective micromotion is associated with a respective compensation field of the plurality of compensation fields;
- identify at least one minimum micromotion of the plurality of micromotions;
- and
- identify at least one compensation field that induces the at least one minimum micromotion.
A quantum information processing (QIP) system, comprising:
- a light source configured to:
- generate a Raman beam having a plurality of points associated with an intensity profile decreasing radially from at least a center point of the Raman beam;
- apply the Raman beam to a dual space single species (DSSS) trapped ion such that the DSSS trapped ion overlaps with a point of the plurality of points, wherein the point is not the center point of the Raman beam
- a power source configured to
- apply a radio frequency (RF) field to the DSSS trapped ion to trap the DSSS trapped ion;
- apply a plurality of compensation fields to the DSSS trapped ion a controller configured to:
- measure a plurality of micromotions of the DSSS trapped ion, wherein each respective micromotion is associated with a respective compensation field of the plurality of compensation fields;
- identify at least one minimum micromotion of the plurality of micromotions;
- and
- identify at least one compensation field that induces the at least one minimum micromotion.
Dependencies are inferred from the claim text.