Correcting quantum errors based on quantum error correction caches (QECCs)

Patent metadata

Field	Value
Publication number	US-12462181-B2
Application number	US-202117536417-A
Country	US
Kind code	B2
Filing date	Nov 29, 2021
Priority date	Nov 29, 2021
Publication date	Nov 4, 2025
Grant date	Nov 4, 2025

Abstract

Correcting quantum errors based on quantum error correction caches (QECCs) is disclosed herein. In one example, a processor device of a quantum computing device is to receive an indication of an occurrence of a quantum error that affects a qubit. The processor device identifies a QECC entry within a plurality of QECC entries of a first QECC of the quantum computing device, wherein the QECC entry corresponds to a previous occurrence of the quantum error. The processor device obtains metadata associated with the previous occurrence of the first quantum error from the QECC entry, and determines a corrective action based on the metadata. The processor device performs the corrective action to remedy the quantum error.

First claim

What is claimed is:

1 . A method, comprising:
receiving, by a first quantum computing device, an indication of an occurrence of a first quantum error that affects a first qubit; identifying a quantum error correction cache (QECC) entry within a plurality of QECC entries of a first QECC of the first quantum computing device, wherein the QECC entry corresponds to a previous occurrence of the first quantum error; obtaining metadata associated with the previous occurrence of the first quantum error from the QECC entry; determining a corrective action based on the metadata; and performing the corrective action.

2 . The method of claim 1 , wherein the metadata comprises one or more of:
an indication of a quantum error type; a timestamp; a qubit identifier; an indication of the corrective action; a source Quantum Assembly (QASM) file identifier; an identifier of one or more concurrently executing quantum services; an identifier of one or more scheduled quantum services; and an indication of an environmental attribute of the first quantum computing device.

3 . The method of claim 1 , wherein the corrective action comprises one or more of modifying a data value of the first qubit, modifying a quantum state of the first qubit, and modifying a source Quantum Assembly (QASM) file corresponding to the first qubit.

4 . The method of claim 1 , further comprising, prior to receiving the indication of the occurrence of the first quantum error:
determining that a quantum error correction (QEC) operation has been performed by a QEC service of the first quantum computing device in response to the previous occurrence of the first quantum error; obtaining, from the QEC service, the metadata associated with the previous occurrence of the first quantum error; and storing the metadata in the QECC entry.

5 . The method of claim 1 , further comprising:
determining that the corrective action did not correct the first quantum error; and performing a quantum error correction (QEC) operation using a QEC service of the first quantum computing device.

6 . The method of claim 1 , further comprising:
identifying a common characteristic of the first quantum computing device and a second quantum computing device; identifying one or more QECC entries of the plurality of QECC entries of the first QECC corresponding to the common characteristic; and copying the one or more QECC entries of the plurality of QECC entries of the first QECC to a second QECC of the second quantum computing device.

7 . The method of claim 6 , wherein the common characteristic comprises:
a common characteristic shared by a first quantum service of the first quantum computing device and a second quantum service of the second quantum computing device; a common characteristic shared by the first qubit of the first quantum computing device and a second qubit of the second quantum computing device; a common characteristic shared by a first operating environment of the first quantum computing device and a second operating environment of the second quantum computing device; and a common characteristic of the first quantum error and a second quantum error that affects the second qubit.

8 . A first quantum computing device comprising:
a first system memory; and a first processor device communicatively coupled to the first system memory, the first processor device to: receive an indication of an occurrence of a first quantum error that affects a first qubit; identify a quantum error correction cache (QECC) entry within a plurality of QECC entries of a first QECC of the first quantum computing device, wherein the QECC entry corresponds to a previous occurrence of the first quantum error; obtain metadata associated with the previous occurrence of the first quantum error from the QECC entry; determine a corrective action based on the metadata; and perform the corrective action.

9 . The first quantum computing device of claim 8 , wherein the metadata comprises one or more of:
an indication of a quantum error type; a timestamp; a qubit identifier; an indication of the corrective action; a source Quantum Assembly (QASM) file identifier; an identifier of one or more concurrently executing quantum services; an identifier of one or more scheduled quantum services; and an indication of an environmental attribute of the first quantum computing device.

10 . The first quantum computing device of claim 8 , wherein the corrective action comprises one or more of modifying a data value of the first qubit, modifying a quantum state of the first qubit, and modifying a source Quantum Assembly (QASM) file corresponding to the first qubit.

11 . The first quantum computing device of claim 8 , wherein the first processor device is further to, prior to receiving the indication of the occurrence of the first quantum error:
determine that a quantum error correction (QEC) operation has been performed by a QEC service of the first quantum computing device in response to the previous occurrence of the first quantum error; obtain, from the QEC service, the metadata associated with the previous occurrence of the first quantum error; and store the metadata in the QECC entry.

12 . The first quantum computing device of claim 8 , wherein the first processor device is further to:
determine that the corrective action did not correct the first quantum error; and perform a quantum error correction (QEC) operation using a QEC service of the first quantum computing device.

13 . The first quantum computing device of claim 8 , wherein the first processor device is further to:
identify a common characteristic of the first quantum computing device and a second quantum computing device; identifying one or more QECC entries of the plurality of QECC entries of the first QECC corresponding to the common characteristic; and copying the one or more QECC entries of the plurality of QECC entries of the first QECC to a second QECC of the second quantum computing device.

14 . The first quantum computing device of claim 13 , wherein the common characteristic comprises:
a common characteristic shared by a first quantum service of the first quantum computing device and a second quantum service of the second quantum computing device; a common characteristic shared by the first qubit of the first quantum computing device and a second qubit of the second quantum computing device; a common characteristic shared by a first operating environment of the first quantum computing device and a second operating environment of the second quantum computing device; and a common characteristic of the first quantum error and a second quantum error that affects the second qubit.

15 . A non-transitory computer-readable medium having stored thereon computer-executable instructions that, when executed, cause one or more processor devices to:
receive an indication of an occurrence of a first quantum error that affects a first qubit; identify a quantum error correction cache (QECC) entry within a plurality of QECC entries of a first QECC of a first quantum computing device, wherein the QECC entry corresponds to a previous occurrence of the first quantum error; obtain metadata associated with the previous occurrence of the first quantum error from the QECC entry; determine a corrective action based on the metadata; and perform the corrective action.

16 . The non-transitory computer-readable medium of claim 15 , wherein the metadata comprises one or more of:
an indication of a quantum error type; a timestamp; a qubit ident

Assignees

• Red Hat Inc

Inventors

• Coady Stephen
• Griffin Leigh

Classifications

• G06F11/14

  Error detection or correction of the data by redundancy in operations (error detection or correction of the data by redundancy in hardware G06F11/16) · CPC title

• G06N10/70 Primary

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