qutip-qip v0.4.0

This release adds two new quantum circuit renderers -- one based on matplotlib and another that renders the circuit as text -- and improves the circuit simulation speed.

New features

• Add matplotlib-based and text-based quantum circuit renderers. The new rendering framework is more flexible and can be used in different environments without latex dependencies. (#239 and #244 by Rushiraj Gadhvi)

Improvements

• einsum is used to speed up the circuit simulation by up to 10 times. (#225 by Boxi Li)

Miscellaneous

• The QIR support is removed. (#238 by Boxi Li)

qutip-qip v0.3.2

Improvements

• Add RZX gate to the SCQubits model. Fix bugs on the ZX strength. (#245)
• Compile the documentation using qutip v5 (#246)

Bug Fixes

• Add phi parameter to expand_operator call. (#237, issue raised by Neill Lambert)
• Fix the warning on MacOS. (#240)
• Fix a bug in :class:~.QubitCircuit.add_1q_gate. (#250, issue raised by hatlabcz Chao Zhou)

v0.3.1

Improvements

• Update qiskit support version to 0.46.* (#232)

Bug Fixes

• Remove comments after meaningful statements in QASM reader. (#218 by NoriyukiK-1qbit)
• Fix circuit plot error for gates with classical controls when reverse_states=False. (#221 by Kevin P. O'Brien)
• Update the RTD configuration file to execute create_tutorials_html.py (#222 reported by Ramyashri Padmanabhakumar)
• Remove the unnecessary use of circuit.propagatos (#226)
• Use CSR as default for expand_operator (#227)
• Update the parsing mode for read_qasm (#224 reported by kevinab107)

qutip-qip v0.3.0

This release adds two major features and one minor feature to the package.

New features

• MAJOR Add Variational Quantum Algorithms in a new module qutip_qip.vqa. Unitary fund microgrant project (#123)
• MAJOR qutip-qip backends for qiskit qutip_qip.qiskit. Google Summer of Code project 2022 (#155)
• Add class representation of quantum gates. (#147)

Documentation

• Add synced qutip-qip tutorials to documentation on Read the docs (#207)

qutip-qip v0.2.3

This release fixes a few bugs and adds a minor feature to the SCQubits model.

Improvements

• Add DRAG correction for the SCQubits simulator. Also improve the interpolation for the idling gates for continuous pulse shape. (#156)

Bug Fixes

• Fix usage of rand_unitary and rand_ket. (#163)
• Fix the final time calculation in GateCompiler.compile. (#162)
• Fix bug for circuit with selected measurement result. (#167)
• Fix bugs in the analytical pulse shapes. (#169)
• Fix the swap gate plotting. (#170) and ( (#177)
• Filter the measurement probability (#182)
• Add a default max_step based on the circuit time (#183)

Miscellaneous

• Fix parsing of package versions in packaging 22. (#181)

qutip-qip v0.2.2

This release adds a few small patches and ensures compatibility with the dev.major version of qutip.

Improvements

• Correct the spelling of Hadamard. (#132)
• Quantum circuits inherit user gates from add_circuit. (#144)

But Fixes

• Fix Circuit Plotting for non-reversed states. (#137)
• Export circuit plots as png with dpi. (#139)
• Fix add_gate behavior when supplied multiple indices. (#142)

qutip-qip v0.2.1

This release includes a revision of the documentation and adds more code examples in the API docstrings.

Bug Fixes

• Remove the check on the initial state dimension in QubitCircuit (#127)

Improvements

• Rewrite the documentation for the pulse-level simulation. (#121)
• Add more code examples in the docstrings. (#126)

qutip-qip v0.2.0

This release adds a few new features to the pulse-level simulator.

Improvements

• MAJOR Add the Model class that represents the physical model including hardware parameters, control and drift Hamiltonians and noise objects. (#105)
• Separate the gate definition from the QubitCircuit.propagators method (#83)
• Support different pulse shapes. (#85)
• Use autosummary to generate a summary of API docs. (#103)
• Improve the scheduling algorithm. (#105)

Compatibility Note

The behaviour of Processor.pulses changes significantly from version 0.1 to version 0.2. In 0.1, if no control coefficients are added, pulses contains a list of partially initialized Pulse objects. They include control Hamiltonians but have no coefficients or tlist. This behaviour has changed. From 0.2, the list only includes controls that have non-trivial dynamics. To inspect the available control Hamiltonians, please use Processor.get_control and Processor.get_control_labels.

qutip-qip v0.1.2

This micro release adds more thorough documentation for the project and fixes a few bugs in QubitCircuit and Processor.

PRs collected here.

Improvements

• Efficient Hadamard transform. (#103)
• Make circuit latex code accessible in QubitCircuit. (#108)

Bug Fixes

• Fix the leaking noise objects in Processor. (#89)
• Fix a bug in time-dependent collapse operators in Processor. (#107)

qutip-qip v0.1.1

This micro release adds more thorough documentation for the project and fixes a few bugs in QubitCircuit and Processor.

PRs collected here.

Improvements

• Improve the documentation.
• Workflows for releases and automatically building the docs with migrated from qutip. (#49, #78)
• The part of tex code taken from circuit is removed due to licence issue. Instead, the latex code now requires the user to install qcircuit in advance. (#61)
• Rename Noise.get_noisy_dynamics with Noise.get_noisy_pulses. The new name is more appropriate because it returns a list of Pulse, not a QobjEvo. The old API is deprecated. (#76)
• Add more thorough documentation for installing external dependencies for circuit plotting. (#65)

Bug Fixes

• Add the missing drift Hamiltonian to the method run_analytically of Processor. It was missing because only the control part of the Hamiltonian is added. (#74)
• Fix a few bugs in QubitCircuit: Make QubitCircuit.propagators_no_expand private. It will be removed and replaced by QubitCircuit.propagators. The attributes QubitCircuit.U_list is also removed. (#66)

Developer Changes

• Documentation is moved from /docs to /doc. (#49)