Apparatus and method including scalable representations of arbitrary quantum computing rotations

Patent metadata

Field	Value
Publication number	US-12265885-B2
Application number	US-202218091202-A
Country	US
Kind code	B2
Filing date	Dec 29, 2022
Priority date	Dec 13, 2019
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

Abstract

Apparatus and method for scalable representations of arbitrary quantum computing rotations. For example, one embodiment of an apparatus comprises: a memory to store a first waveform; and a base envelope generator to implement a base envelope, the base envelope applied to the first waveform to generate a second waveform usable to cause quantum rotation of a specified angle on a target quantum bit (qubit) of a quantum processor, and wherein the base envelope is selected out of a first plurality of envelopes based one or more characteristics specific to the target qubit on which the quantum rotation is performed.

First claim

What is claimed is:

1. An apparatus comprising:
a memory to store a first waveform; and
a base envelope generator to implement a base envelope, the base envelope applied to the first waveform to generate a second waveform usable to cause quantum rotation of a specified angle on a target quantum bit (qubit) of a quantum processor,
wherein the base envelope is selected out of a first plurality of envelopes based one or more characteristics specific to the target qubit on which the quantum rotation is performed.

2. The apparatus of claim 1 , wherein the specified angle is used to scale the base envelope.

3. The apparatus of claim 1 , wherein the specified angle is provided from one or more gates and/or instructions.

4. The apparatus of claim 1 , further comprising:
compensation circuitry to implement a compensation envelope to the second waveform to compensate for distortions in a signal path to the target qubit,
wherein the compensation envelope is selected out of a second plurality of envelopes based on qubit-specific compensation data associated with the target qubit.

5. The apparatus of claim 4 , wherein the compensation envelope compensates for amplitude-dependent coherent errors with specific angle and amplitude values (f (ang, amp)).

6. The apparatus of claim 5 , wherein the specific angle and amplitude values are selected from a look-up table indexed by the specified angle or as a function generator.

7. The apparatus of claim 1 , wherein the first waveform is selected out of a plurality of waveforms stored in the memory based on an output of a numerically-controlled oscillator (NCO).

8. The apparatus of claim 1 wherein the first waveform comprises in-phase (I) and quadrature (Q) signal components.

9. A method comprising:
storing, in a memory, a first waveform; and
applying a base envelope to the first waveform to generate a second waveform usable to cause quantum rotation of a specified angle on a target quantum bit (qubit) of a quantum processor,
wherein the base envelope is selected out of a first plurality of envelopes based one or more characteristics specific to the target qubit on which the quantum rotation is performed.

10. The method of claim 9 , further comprising scaling the base envelope based on the specified angle.

11. The method of claim 9 , wherein the specified angle is provided from one or more gates and/or instructions.

12. The method of claim 9 , further comprising:
applying a compensation envelope to the second waveform to compensate for distortions in a signal path to the target qubit, wherein the compensation envelope is selected out of a second plurality of envelopes based on qubit-specific compensation data associated with the target qubit.

13. The method of claim 12 , wherein the compensation envelope compensates for amplitude-dependent coherent errors with specific angle and amplitude values (f (ang, amp)).

14. The method of claim 13 , further comprising:
selecting the specific angle and amplitude values from a look-up table indexed by the specified angle or as a function generator.

15. The method of claim 9 , further comprising:
selecting the first waveform out of a plurality of waveforms stored in the memory based on an output of a numerically-controlled oscillator (NCO).

16. The method of claim 9 , wherein the first waveform comprises in-phase (I) and quadrature (Q) signal components.

17. A non-transitory machine-readable medium having program code stored thereon which, when executed by a machine, causes the machine to perform operations of:
storing, in a memory, a first waveform; and
applying a base envelope to the first waveform to generate a second waveform usable to cause quantum rotation of a specified angle on a target quantum bit (qubit) of a quantum processor,
wherein the base envelope is selected out of a first plurality of envelopes based one or more characteristics specific to the target qubit on which the quantum rotation is performed.

18. The non-transitory machine-readable medium of claim 17 , wherein the operations further comprise:
scaling the base envelope based on the specified angle.

19. The non-transitory machine-readable medium of claim 17 , wherein the specified angle is provided from one or more gates and/or instructions.

20. The non-transitory machine-readable medium of claim 17 , wherein the operations further comprise:
applying a compensation envelope to the second waveform to compensate for distortions in a signal path to the target qubit, wherein the compensation envelope is selected out of a second plurality of envelopes based on qubit-specific compensation data associated with the target qubit.

21. The non-transitory machine-readable medium of claim 20 , wherein the compensation envelope compensates for amplitude-dependent coherent errors with specific angle and amplitude values (f (ang, amp)).

22. The non-transitory machine-readable medium of claim 21 , wherein the operations further comprise:
selecting the specific angle and amplitude values from a look-up table indexed by the specified angle or as a function generator.

23. The non-transitory machine-readable medium of claim 17 , wherein the operations further comprise:
selecting the first waveform out of a plurality of waveforms stored in the memory based on an output of a numerically-controlled oscillator (NCO).

24. The non-transitory machine-readable medium of claim 17 , wherein the first waveform comprises in-phase (I) and quadrature (Q) signal components.

Assignees

• Intel Corp

Inventors

• Zou Xiang
• Premaratne Shavindra

Classifications

• G06N10/80

  Quantum programming, e.g. interfaces, languages or software-development kits for creating or handling programs capable of running on quantum computers; Platforms for simulating or accessing quantum computers, e.g. cloud-based quantum computing · CPC title

• G06N10/60

  Quantum algorithms, e.g. based on quantum optimisation, quantum Fourier or Hadamard transforms · CPC title

• G06N10/70

  Quantum error correction, detection or prevention, e.g. surface codes or magic state distillation · CPC title

• G06N10/40

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

• G06N10/20 Primary

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