Tergite Backend

[2026.03.1]

released on 17th of March 2026

Added

  • Added rq queue default timeouts set from environment vars MAX_EXECUTION_TIME, MAX_PREPROCESSING_TIME, MAX_POSTPROCESSING_TIME and MAX_GENERAL_QUEUE_TIME

Fixed

  • Add beta qobj parameters for gaussian pulse for compatibility with new SDK-level drag instruction

[2026.03.0]

released on 16th of March 2026

  • No Change

[2025.12.0]

released on: 16th March 2026

Added

  • Added decryption of .env file in the bcc_start.sh script
  • [BREAKING] Added the PRIVATE_KEY_FILE, PRIVATE_KEY_PASSWORD environment variables
  • Added PYTEST_ARGS CI environment variable for use in CI
  • Added SpiDAC controller for controlling the flux tunable couplers
  • Added REQUEST_LOG_TTL and REQUEST_LOG_CLEAN_INTERVAL to control the rate at which request logs are cleared
  • Added JOBS_STORE_TTL and JOBS_STORE_CLEAN_INTERVAL to control the rate at which old jobs data is cleared from redis store
  • Added TTL on RedisStore
  • Added motzoi parameter to the calibration config seed
  • Added clock phase resets for all drive channels before running each job

Changed

  • Removed the automatic clearing of the redis database on every startup
  • Removed the JOB_EXECUTION_POOL_DIRNAME env variable
  • [BREAKING] Removed the MSS_APP_TOKEN environment variable
  • Changed connection to MSS to use RSA-secured websockets instead of RESTful HTTP requests
  • Fixed issue with executor being re-initialized on every job submission
  • Refactored SpiDAC code to be less dependent on global variables but to be fully dependent on the parent executor
  • Replaced Gaussian pulse with DRAG pulse for quantify executor
  • Changed discriminate_results in quantum_job to explicitly map quantify qubits ids to qobj qubit ids
  • Changed ShiftPhase Instruction in Quantify to convert radians to degrees
  • Changed quantify executor initialization to allow skipping cluster reset for stability

Fixed

  • Fixed ‘Error 111 connecting to localhost:6379’ when only RQ_REDIS_URL is provided
  • Fixed KeyError ‘edges’ due to new version of networkx
  • Fixed qobj to quantify scheduling mapping issue by adding barrier, dispatch and sync compensations in quantify executor
  • Fixed SPI_Dac logic allowing to restore currents to values recorded before running a job
  • Fixed WacqtCZPulse Instruction for quantify backend to use SoftSquare pulse instead of numerical waveform
  • Fixed discriminate_results in quantum_job scripts to properly process circuit_level acquisition requirements

[2025.09.1]

released on: 6th November 2025

Added

  • Added isort check in the CI files
  • Added isort in the pre-commit-config.yaml file
  • Added CURRENT_DATE environment variable to mock the global current timestamp, useful during tests
  • Added the /bookings/config endpoint to return the configuration for the booking service
  • Added CURRENT_DATE environment variable for mocking global current timestamp in testing environments.
  • Added filtering bookings at /bookings endpoint by user_id
  • Added sorting bookings at /bookings endpoint by any field

Fixed

  • Fixed error “invalid value for log level” when starting BCC without specifying the $UVICORN_LOG_LEVEL env variable
  • Fixed error failing qiskit-dynamics backend tests
  • Fixed ‘KeyError: ’Another instrument has the name: quantify’’ in spi tests
  • Fixed AttributeError: module ‘bcrypt’ has no attribute ‘about’
  • Fixed ‘SyntaxWarning: invalid escape sequence’’
  • Fixed ‘user of id … not found’ error when cancelling booking created by an MSS user

Changed

  • Changed LOG_LEVEL default value to ‘ERROR’

[2025.09.0]

released on: 2nd of October 2025

Added

  • Install a pre-commit hook to run black
  • Added a support for measurement level 1 for simulator for both single and avg modes
  • Added a support for measurement level 1 for real backend for both single and avg modes
  • Added authentication via JWT, with temporary JWT token generated by the backend instance and passed through MSS to the SDK
  • Added support for booked time slots, on top of the first-in-first-out (FIFO) queue
  • Added the following endpoints for the sake of handling bookings:
    • /token (POST)
    • /users (POST, GET)
    • /users/{user_id} (POST, GET, DELETE)
    • /me (DELETE, GET)
    • /bookings (POST, GET)
    • /bookings/{booking_id}/cancel (POST)
  • BREAKING: Added authentication of requests from MSS by verifying that x-mss-signature is signed using MSS’s private key
  • Added canceling of jobs via MSS
  • Added and adapted SpiDAC class from autocalibration package for coupler biasing
  • Modify Quantify quantum executor by calling SpiDAC to bring up currents before running a schedule
  • Add a placeholder Wacqt-two-qubit-gate function for Qobj to QuantifySchedule mapper with a flux port reference
  • Add filtering bookings by minimum/maximum start timestamps

Changed

  • BREAKING: Changed authentication during job submission to use JWT token only
  • BREAKING: Removed authentication of requests by referer’s IP address
  • BREAKING: Removed authentication of job-submission requests that would check that the API key submitted was associated with the job submitted
    • BREAKING: Removed the /auth endpoint
  • BREAKING: Changed the return type of the /jobs POST endpoint to be the job in JSON as opposed to {"message": string}
  • BREAKING: Added pagination to the /jobs GET endpoint, changing the return type to {"data": []object, limit: number, skip: number} as opposed to []object
  • BREAKING: Changed the /jobs endpoint to return only jobs that belong to the user whose id is in the x-mss-user-is header.
  • BREAKING: Changed the return type of the /jobs GET endpoint to be the job in JSON as opposed to {"message": object}
  • BREAKING: Removed the /jobs/{job_id}/status endpoint.
  • BREAKING: Removed the /jobs/{job_id}/result endpoint.
  • BREAKING: Changed the return type of the /jobs DELETE endpoint to {"status": "success", "detail": string} as opposed to {"message": string}
  • BREAKING: Changed the return type of the /jobs/{job_id}/cancel POST endpoint to {"status": "success", "detail": string} as opposed to nothing
  • BREAKING: Changed the return type of the /logfiles/{logfile_id} GET endpoint when an error occurs to return an error status code with {"detail": string} JSON response.
  • BREAKING: Changed the names of the workers/queues used to {PREFIX}_general, {PREFIX}_preprocessing, {PREFIX}_normal_execution, {PREFIX}_booked_execution, {PREFIX}_postprocessing

Fixed

  • Fix bcrypt 5.0.0 ValueError ‘password cannot be longer than 72 bytes, truncate manually if necessary (e.g. my_password[:72])’

[2025.06.2]

released on: 17th of June 2025

  • No changes

[2025.06.1]

released on: 17th of June 2025

  • No changes

[2025.06.0]

released on: 16th of June 2025

Added

  • Add a simpler JSON document based store in redis

Changed

  • Changed source of lda parameters to backend’s redis store. Originally they were retrieved from MSS.
  • Added proper HTTP status codes for failed REST API requests
    • InvalidJobIdInUploadedFileError results in a 400 HTTP response (originally was 200)
    • ItemNotFoundError results in a 404 HTTP response (originally was 200)
    • JobAlreadyCancelled results in a 406 HTTP response (originally was 500)
  • BREAKING: Change endpoint /v2/static-properties to /static-properties
  • BREAKING: Change endpoint /v2/dynamic-properties to /dynamic-properties
  • Rename the properties library to device_parameters
  • Upgraded to python 3.12
  • Removed the deprecated qiskit-ibmq-providers dependency, moving its code into our lib folder
  • Moved from requirements.txt to pyproject.toml setup
  • Bumped up the version of fastapi to the latest (>=0.115.12)
  • Added validation of job files when uploading jobs to /jobs

[2025.03.2]

released on: 7th of April 2025

Changed

  • Remove stale fixtures

Fixed

  • Fixed JSONDecodeError when application is run in systemd

[2025.03.1]

released on: 18th of March 2025

Changed

  • No change

[2025.03.0]

released on: 18th of March 2025

Changed

  • Removed the storage-file internal lib

  • Limited pyarrow to versions ‘18.0.0’ and below for macOS

  • Decouple data from algorithms in storage file

  • Decouple native job run from executor instance

  • Remove debug prints of qobj when running jobs

  • Rename the run_experiment and run methods of the QuantumEexcutor class to _run_native, run

  • Clean up qobj-to-quantify compilation

  • Removed Program

  • Removed the dag property of the NativeExperiment class

  • Enchanced the Channel class to track all instructions attached to it

  • Added the ‘to_operation’ method on the BaseInstruction of quantify, removing the long if-conditional QauntifyExperiment.schedule_operation method that was originally generating Operator’s

  • Replaced the looping of the DAG with the looping of the instructions on each channel

  • Created the ChannelRegistry dict-like class to track the state of all channels attached to an experiment

  • Deleted rot_left and ceil4 utility functions and other unused utility functions

  • Split FreqInstruction class to SetFreqInstruction and ShiftFreqInstruction

  • Split PhaseInstruction class to SetPhaseInstruction and ShiftPhaseInstruction

  • Added the QBLOX_TIMEGRID_INTERVAL constant

  • Moved the Instruction class in the quantum_executor/base folder to quantum_executor/quantify folder, renaming it to BaseInstruction

  • Removed the channels property from the NativeExperiment class

  • Added the channel_registry property on the QauntifyExperiment class

  • Moved the Channel definition from utils to the quantum_executor/quantify folder

  • Removed retworkx from the requirements.txt

  • Updated quantify-scheduler, quantify-core and qblox-instruments and pydantic versions

  • BREAKING CHANGE: Split cluster configurations into quantify-config.json and quantify-metadata.json

  • BREAKING CHANGE: Added a new configuration file calibration.seed.toml for seeding the database with calibration data

  • Enhanced the QuantifySchedule conversion to use parametric schedules and new portclock convention

[2024.12.1]

released on: 20th of December 2024

Added

  • Added Dockerfile.
  • Added instructions how to run with docker.
  • Added instructions how to run the qiskit_pulse_2q simulator in the configuration docs.

Changed

  • Changed start_bcc.sh script to use redis connection obtained from the environment.
  • Changed start_bcc.sh script to update the exported environment variables after reading from the ENV_FILE.
  • Updated Github action to deploy built multiplatform image to docker hub as something like tergite/tergite-backend
  • Removed some redundant libraries in the requirements.txt file.
  • Removed some outdated docs.

[2024.12.0]

released on: 11th of December 2024

Added

  • Added redis connection environment variables
  • Added GitLab CI configuration
  • Added storing of Qobj header data in the logfiles of the quantum jobs
  • Qiskit dynamics simulator backend with two-qubit CZ gate (“qiskit_pulse_2q”)
  • Added CouplerProps to Backend Configurations
  • Added the coupling_dict to the backend_config.toml

Fixed

  • Fixed httpx version to 0.27.2 as 0.28.0 removes many deprecations that we were still dependent on in FastAPI testClient

Changed

  • Removed the coupling_map from the backend_config.toml as it is generated on-the-fly from the coupling_dict.

[2024.09.1]

released on: 24th of September 2024

Fixed

  • Fixed ‘KeyError’ when no units are not passed in the backend_config file
  • Fixed “…bin/conda/activate: Not a directory” error when starting as systemd service
  • Fixed silent error where calibrations are not sent to MSS on executor initialization
  • Fixed “TypeError: Object of type datetime is not JSON serializable” when sending calibration data to MSS
  • Fixed ‘SyntaxWarning: ’is not’ with a literal’ when initializing backend

[2024.09.0]

released on: 16th of September 2024

Added

  • The QuantumExecutor as abstract class to implement a backend
  • EXECUTOR_TYPE keyword in the .env variables to select the backend
  • Qiskit dynamics simulator backend with one qubit (“qiskit_pulse_1q”)
  • Added the initialization of the redis store with configuration picked from the backend_config.toml file when the execution worker starts
  • Added an initial request to update the backend information in MSS when the execution worker starts

Changed

  • BREAKING CHANGE: EXECUTOR_DATA_DIRNAME definition in the .env variables instead of general.data_dir in executor-config.yml
  • BREAKING CHANGE: Removed the whole general section in the executor-config.yml
  • BREAKING CHANGE: Renamed executor-config.yml to quantify-config.yml
  • Removed the old config files that were used for setting up automatic calibration
  • Removed the script that loaded automatic calibration configurations at the start
  • Moved the backend_config.toml file from /configs folder
  • Moved the properties service to the libs folder
  • Moved the storage, date_time, representation and logging utils to the properties lib
  • Removed the scripts folder

[2024.04.0]

released on 28th of May 2024

Initial Public Release

Added

  • Added storage_file lib (formerly tergite-quantify-connector-storagefile)
  • Added quantum_executor service (formerly tergite-quantify-connector)
  • Added the executor-config.yml and its python-based validators

Changed

  • Changed the way discriminators are loaded to load from the database
  • BREAKING_CHANGE: Removed hard-coded discriminators
  • BREAKING_CHANGE: Removed official support for Python 3.8; Official support is now >=3.12
  • BREAKING_CHANGE: Removed Labber support
  • Replaced tergite-quantify-connector-storagefile package with an internal storage_file lib
  • Moved unused files to archive folder
  • BREAKING_CHANGE: Removed calibration and two state discrimination source code
  • BREAKING_CHANGE: Replaced tergite-quantify-connector-storagefile package with an internal storage_file lib
  • BREAKING_CHANGE: Merged tergite-quantify-connector into tergite-backend and renamed its service to quantum_executor
  • BREAKING_CHANGE: Changed configuration of hardware to use executor-config.yml file with proper validations on loading
  • BREAKING_CHANGE: Removed support for Pulsar, or any other instrument drivers other than Cluster
    The old implementation wrongfully assumed that all these drivers have the same signature i.e. driver(name: str, identifier: str | None)
    yet SpiRack(name: str, address: str, baud_rate: int = 9600, timeout: float = 1, is_dummy: bool = False,),
    Pulsar(name: str, identifier: Optional[str] = None, port: Optional[int] = None, debug: Optional[int] = None, dummy_type: Optional[PulsarType] = None,)
    Cluster(name: str, identifier: Optional[str] = None, port: Optional[int] = None, debug: Optional[int] = None, dummy_type: Optional[PulsarType] = None) are all different.
  • BREAKING_CHANGE: We got rid of quantify connector’s redundant reset() method.
  • BREAKING_CHANGE: Changed backend name used when querying MSS for backend properties to be equal to settings.DEFAULT_PREFIX

Fixed

  • Fixed duplicate job uploads to respond with HTTP 409
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