Apparatuses, systems, and methods for elliptical atomic object traps

Patent metadata

Field	Value
Publication number	US-12014917-B2
Application number	US-202117533587-A
Country	US
Kind code	B2
Filing date	Nov 23, 2021
Priority date	Dec 17, 2020
Publication date	Jun 18, 2024
Grant date	Jun 18, 2024

Abstract

The disclosure provides an atomic object trap apparatus and a method of operating such. The atomic object trap apparatus comprises two or more radio frequency (RF) electrodes formed concentrically in a substantially elliptical shape; and three or more trapping and/or transport (TT) electrode sequences formed concentrically in a substantially elliptical shape. The two or more RF electrodes and the three or more TT electrode sequences define a substantially elliptically-shaped atomic object trap. At least one TT electrode sequence of the three or more TT electrode sequences is disposed concentrically between the two or more RF electrodes. Each RF electrode and TT electrode sequence is elliptically shaped such that each comprises two substantially parallel longitudinal regions and two arc-spanning beltway regions, the four regions forming a substantially elliptical shape. The method is directed to operating a quantum computing system comprising an example atomic object trap apparatus.

First claim

That which is claimed:

1. An atomic object trap apparatus comprising:
two or more radio frequency (RF) electrodes formed concentrically in a substantially elliptical shape, and
three or more trapping and/or transport (TT) electrode sequences formed concentrically each in a substantially elliptical shape, the two or more RF electrodes and the three or more TT electrode sequences defining a substantially elliptically-shaped atomic object trap and at least one TT electrode sequence of the three or more TT electrode sequences being disposed concentrically between the two or more RF electrodes, wherein each substantially elliptically-shaped RF electrode and TT electrode sequence comprises two substantially parallel longitudinal regions and two arc-spanning beltway regions.

2. The atomic object trap apparatus of claim 1 , wherein each substantially parallel longitudinal region of each of the three or more TT electrode sequences is arranged into a plurality of zones and each arc-spanning beltway region of the at least one TT electrode sequence disposed concentrically between the two or more RF electrodes comprises a plurality of TT electrodes arranged into three or more subgroups of TT electrodes.

3. The atomic object trap apparatus of claim 2 , wherein the TT electrodes of each subgroup of TT electrodes are in electrical communication with each other.

4. The atomic object trap apparatus of claim 2 , wherein the plurality of TT electrodes is arranged such that every n th TT electrode is associated with one subgroup of TT electrodes, wherein n is greater than 1.

5. The atomic object trap apparatus of claim 2 , wherein each subgroup of TT electrodes is configured to be operated independently to at least one of (a) create a plurality of potential wells, or (b) move a potential well.

6. The atomic object trap apparatus of claim 5 , wherein creating a plurality of potential wells and moving a potential well are configured to cause at least one atomic object within the defined atomic object trap to be transported from a first longitudinal region of a RF electrode to a second longitudinal region of the RF electrode.

7. The atomic object trap apparatus of claim 6 , wherein the at least one atomic object comprises an ion-crystal, the ion-crystal comprising a qubit atomic object and a sympathetic cooling (SC) atomic object.

8. The atomic object trap apparatus of claim 2 , wherein the plurality of zones comprises a plurality of gating zones and a plurality of auxiliary zones.

9. The atomic object trap apparatus of claim 8 , wherein each gating zone is disposed between two auxiliary zones, the gating zone configured for an action to be performed on at least one atomic object within the gating zone and the two auxiliary zones configured for stabilizing the at least one atomic object during a transport operation of the at least one atomic object.

10. The atomic object trap apparatus of claim 9 , wherein the action comprises at least one of (a) a split operation, (b) a combine operation, or (c) a swap operation, the action being caused at least in part by a manipulation source.

11. The atomic object trap apparatus of claim 10 , wherein the manipulation source is a laser beam, the laser beam being configured to act as a manipulation source for one or more gating zones.

12. The atomic object trap apparatus of claim 8 , wherein each gating zone of the at least one TT electrode sequence disposed concentrically between the two or more RF electrodes comprises at least 5 TT electrodes.

13. The atomic object trap apparatus of claim 8 , wherein each auxiliary zone of the at least one TT electrode sequence disposed concentrically between the two or more RF electrodes comprises at least three TT electrodes.

14. The atomic object trap apparatus of claim 1 , wherein at least one of the two arc-spanning beltway regions of the at least one TT electrode sequence disposed concentrically between the two or more RF electrodes comprises a load hole configured for loading atomic objects into the atomic object trap.

15. The atomic object trap apparatus of claim 1 , wherein (a) the two or more RF electrodes are disposed between a first and third sequence of TT electrodes, (b) the two or more RF electrodes form at least one elliptical gap, and (c) a second sequence of TT electrodes is disposed within the elliptical gap.

16. The atomic object trap apparatus of claim 1 , wherein the atomic object trap apparatus is part of a trapped ion quantum computer.

17. An atomic object trap apparatus comprising:
a plurality of elliptically-shaped radio frequency (RF) electrodes, and
a plurality of elliptically-shaped trapping and/or transport (TT) electrode sequences, the plurality of RF electrodes and the plurality of TT electrode sequences defining an atomic object trap, wherein the defined atomic object trap comprises a longitudinal gating region and two beltway regions.

18. The atomic object trap apparatus of claim 17 , wherein the longitudinal gating region is arranged into a plurality of zones and the two beltway regions are configured to be operated so as to cause an atomic object within the atomic object trap to be transported from a first zone of the plurality of zones to a second zone of the plurality of zones.

19. The atomic object trap apparatus of claim 17 , wherein each of the two beltway regions comprises a plurality of TT electrodes disposed between the RF electrodes, the plurality of TT electrodes being energized to generate a plurality of electrical potentials.

20. A method of operating a quantum computing system comprising an atomic object trap apparatus comprising:
loading a plurality of atomic objects through a load hole located at an arc-spanning beltway region of a trapping and/or transport (TT) electrode sequence, wherein the TT electrode sequence is substantially elliptically-shaped and disposed between two substantially elliptically-shaped radio frequency (RF) electrodes, wherein each substantially elliptically-shaped TT electrode sequence and RF electrode comprises two substantially parallel longitudinal regions and two arc-spanning beltway regions;
cooling the plurality of atomic objects using a cooling laser beam;
detecting an amount of fluorescence emitted by the plurality of atomic objects; and
transporting the plurality of atomic objects, wherein the transporting generates at least one electrical potential configured to cause loading of a second plurality of atomic objects through the load hole.

Assignees

• Quantinuum Llc

Inventors

• Hayes David
• Makotyn Philip
• Stutz Russell
• Rowe Mary
• Spaun Benjamin
• Estey Brian
• Loftus Thomas

Classifications

• G06N10/20

  Models of quantum computing, e.g. quantum circuits or universal quantum computers · CPC title

• H01J49/422 Primary

  Two-dimensional RF ion traps (ion guides without mass selection H01J49/062) · CPC title

• G06N10/40 Primary

  Physical realisations or architectures of quantum processors or components for manipulating qubits, e.g. qubit coupling or qubit control · CPC title

• G06N10/00 Primary

  Quantum computing, i.e. information processing based on quantum-mechanical phenomena · CPC title