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)

qutip-qip v0.1.0

This is the first release of qutip-qip, the Quantum Information Processing package in QuTiP.

The qutip-qip package used to be a module qutip.qip under QuTiP (Quantum Toolbox in Python). From QuTiP 5.0, the community has decided to decrease the size of the core QuTiP package by reducing the external dependencies, in order to simplify maintenance. Hence a few modules are separated from the core QuTiP and will become QuTiP family packages. They are still maintained by the QuTiP team but hosted under different repositories in the QuTiP organization.

The qutip-qip package, QuTiP quantum information processing, aims at providing basic tools for quantum computing simulation both for simple quantum algorithm design and for experimental realization. Compared to other libraries for quantum information processing, qutip-qip puts additional emphasis on the physics layer and the interaction with the QuTiP package. The package offers two different approaches for simulating quantum circuits, one with QubitCircuit calculating unitary evolution under quantum gates by matrix product, another called Processor using open system solvers in QuTiP to simulate the execution of quantum circuits on a noisy quantum device.