Methods and apparatuses for mapping state preparation error to subspace leakage error
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.
1. A method of operating a quantum information processing (QIP) system, comprising:
providing a plurality of dual space single species (DSSS) trapped ions erroneously left in a first ground manifold qubit state;
applying a beam to the plurality of DSSS trapped ions to transition a first subset of the plurality of DSSS trapped ions from the first ground manifold qubit state to a second ground manifold qubit state and a second subset of the plurality of DSSS trapped ions from the first ground manifold qubit state to at least one third state, wherein the second ground manifold qubit state is an intended state for the plurality of DSSS trapped ions;
identifying one or more processes associated with the second subset of the plurality of DSSS trapped ions; and
discarding the one or more processes.
2. The method of claim 1 , wherein:
applying the beam further comprises applying the beam to transition a second plurality of DSSS trapped ions from the second ground manifold qubit state and the at least one third state to the first ground manifold qubit state; and
a first efficiency associated with transitioning the first subset and the second subset is more than 100 times higher than a second efficiency associated with transitioning the second plurality of DSSS trapped ions.
3. The method of claim 1 , wherein applying the beam comprises applying the beam to transition the second subset of the plurality of DSSS trapped ions from the first ground manifold qubit state to one or more Zeeman states.
4. The method of claim 1 , wherein applying the beam comprises applying a pi-polarized global beam.
5. The method of claim 4 , wherein the pi-polarized global beam is resonant or near resonant with a transition from a S manifold to a P manifold.
6. The method of claim 1 , wherein the plurality of DSSS trapped ions includes ions having half-integer nuclear spin above I=½.
7. The method of claim 1 , wherein the plurality of DSSS trapped ions includes Barium 133 ions.
8. 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:
cause the QIP system to provide a plurality of dual space single species (DSSS) trapped ions erroneously left in a first ground manifold qubit state;
cause a light source to apply a beam to the plurality of DSSS trapped ions to transition a first subset of the plurality of DSSS trapped ions from the first ground manifold qubit state to a second ground manifold qubit state and a second subset of the plurality of DSSS trapped ions from the first ground manifold qubit state to at least one third state, wherein the second ground manifold qubit state is an intended state for the plurality of DSSS trapped ions;
identify one or more processes associated with the second subset of the plurality of DSSS trapped ions; and
discard the one or more processes.
9. The non-transitory computer readable medium of claim 8 , wherein:
the instructions for applying the beam further comprises instructions for applying the beam to transition a second plurality of DSSS trapped ions from the second ground manifold qubit state and the at least one third state to the first ground manifold qubit state; and
a first efficiency associated with transitioning the first subset and the second subset is more than 100 times higher than a second efficiency associated with transitioning the second plurality of DSSS trapped ions.
10. The non-transitory computer readable medium of claim 8 , wherein the instructions for applying the beam comprises instructions for applying the beam to transition the second subset of the plurality of DSSS trapped ions from the first ground manifold qubit state to one or more Zeeman states.
11. The non-transitory computer readable medium of claim 8 , wherein the instructions for applying the beam comprises instructions for applying a pi-polarized global beam.
12. The non-transitory computer readable medium of claim 11 , wherein the pi-polarized global beam is resonant or near resonant with a transition from a S manifold to a P manifold.
13. The non-transitory computer readable medium of claim 8 , wherein the plurality of DSSS trapped ions includes ions having half-integer nuclear spin above I=½.
14. The non-transitory computer readable medium of claim 8 , wherein the plurality of DSSS trapped ions includes Barium 133 ions.
15. A quantum information processing (QIP) system, comprising:
a controller configured to:
control a light source;
cause the QIP system to provide a plurality of dual space single species (DSSS) trapped ions erroneously left in a first ground manifold qubit state; and
the light source configured to apply a beam to the plurality of DSSS trapped ions to transition a first subset of the plurality of DSSS trapped ions from the first ground manifold qubit state to a second ground manifold qubit state and a second subset of the plurality of DSSS trapped ions from the first ground manifold qubit state to at least one third state, wherein the second ground manifold qubit state is an intended state for the plurality of DSSS trapped ions;
wherein the controller is further configured to:
identify one or more processes associated with the second subset of the plurality of DSSS trapped ions; and
discard the one or more processes.
16. The QIP system of claim 15 , wherein:
applying the beam further comprises applying the beam to transition a second plurality of DSSS trapped ions from the second ground manifold qubit state and the at least one third state to the first ground manifold qubit state; and
a first efficiency associated with transitioning the first subset and the second subset is more than 100 times higher than a second efficiency associated with transitioning the second plurality of DSSS trapped ions.
17. The QIP system of claim 15 , wherein applying the beam comprises applying the beam to transition the second subset of the plurality of DSSS trapped ions from the first ground manifold qubit state to one or more Zeeman states.
18. The QIP system of claim 15 , wherein applying the beam comprises applying a pi-polarized global beam.
19. The QIP system of claim 18 , wherein the pi-polarized global beam is resonant or near resonant with a transition from a S manifold to a P manifold.
20. The QIP system of claim 15 , wherein the plurality of DSSS trapped ions includes ions having half-integer nuclear spin above I=½.
21. The QIP system of claim 15 , wherein the plurality of DSSS trapped ions includes Barium 133 ions.