This release contains a range of new features and performance improvements for the dynamics simulation and adds more tools for error correction applications. It introduces new CUDA-Q API for kernels that return values (run), and adds support for connecting to Quantum Machines backends. This release also contains a contributions from UnitaryHack. With this release, we now include support for Python 3.13.

Note: Support for Python 3.10 will be removed in future releases.

What's Changed

Features and Enhancements 🎉

• Dynamics operator batching by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/3129
• Support input state batching in dynamics evolve by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/2921
• General evolve super-operator construction by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/2960
• Support fine-grained store intermediate result option in evolve by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/3055
• Support multi-diagonal operator conversion for dynamics by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/2993
• Enable run API by @khalatepradnya in https://github.com/NVIDIA/cuda-quantum/pull/2927
• Add ability to create a measurement matrix from a Clifford-only kernel by @bmhowe23 in https://github.com/NVIDIA/cuda-quantum/pull/2919
• Support for Quantum Machines backends by @HanaGiatQM in https://github.com/NVIDIA/cuda-quantum/pull/2838

Bug Fixes 🐛

• Proper handling of evolve_async input state by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/2951
• Fix constant folding of booleans casted to integers by @annagrin in https://github.com/NVIDIA/cuda-quantum/pull/2805
• Fix an issue with tensornet observe when the canonicalized spin_op doesn't span the entire qubit space by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/3038
• Fixing an issue with apply_noise on the mgpu backend by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/3070
• Remove external linkage of Stim symbols in libnvqir-stim.so by @bmhowe23 in https://github.com/NVIDIA/cuda-quantum/pull/3076
• Fix bugs when lowering ternary operator by @schweitzpgi in https://github.com/NVIDIA/cuda-quantum/pull/3108
• Fixes a number of bugs, todos, etc. by @schweitzpgi in https://github.com/NVIDIA/cuda-quantum/pull/3083
• Improve compilation for docs examples by @schweitzpgi in https://github.com/NVIDIA/cuda-quantum/pull/3130
• Fix handling of empty vector in kernel arguments by @schweitzpgi in https://github.com/NVIDIA/cuda-quantum/pull/3142
• Fix default config file generator cmake helper function and add test by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/3164
• Fix a couple of bugs for python loops by @schweitzpgi in https://github.com/NVIDIA/cuda-quantum/pull/3200
• Avoid calls to MPI_Comm_rank() after finalize by @cuMikeBrown in https://github.com/NVIDIA/cuda-quantum/pull/3198
• Propagate conditional feedback metadata from callees to callers by @annagrin in https://github.com/NVIDIA/cuda-quantum/pull/3219

Breaking Changes 🛠

• Drop library mode support in remote simulators by @khalatepradnya in https://github.com/NVIDIA/cuda-quantum/pull/2977
• Update to cuquantum 25.06 by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/3156

Documentation Updates ✏️

• Preface for dynamics examples by @mawolf2023 in https://github.com/NVIDIA/cuda-quantum/pull/2865
• Documentation for CUDAQ_ENABLE_MEMPOOL by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/2849
• Add docs for adding a new backend by @nvidia-dobri in https://github.com/NVIDIA/cuda-quantum/pull/2878
• Fixing the bug in the Krylov example by @marwafar in https://github.com/NVIDIA/cuda-quantum/pull/2973
• Add Quantum PageRank example by @Squirtle007 in https://github.com/NVIDIA/cuda-quantum/pull/2806
• Edit CUDAQ_GLOBAL_INDEX_BITS doc by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/3005
• Ion Trap example by @Gopal-Dahale in https://github.com/NVIDIA/cuda-quantum/pull/3026
• Fixing an error in the operator documentation by @sacpis in https://github.com/NVIDIA/cuda-quantum/pull/3019
• Add run to the algorithmic primitives by @khalatepradnya in https://github.com/NVIDIA/cuda-quantum/pull/3067
• Add ion trap example to the dynamics docs by @Gopal-Dahale in https://github.com/NVIDIA/cuda-quantum/pull/3063
• Update Grover's algorithm with phase oracle by @mmvandieren in https://github.com/NVIDIA/cuda-quantum/pull/3125
• Update adapt_qaoa tutorial and fix the mixer_pool issue by @marwafar in https://github.com/NVIDIA/cuda-quantum/pull/3143
• Update tutorials for unitary compilation using diffusion models by @FlorianFuerrutter in https://github.com/NVIDIA/cuda-quantum/pull/3101
• Document the run API and add examples by @khalatepradnya in https://github.com/NVIDIA/cuda-quantum/pull/3182
• CPP examples by @sacpis in https://github.com/NVIDIA/cuda-quantum/pull/2790
• Dynamics batching documentation by @1tnguyen in https://github.com/NVIDIA/cuda-quantum/pull/3183

Other Changes

• Add ability to propagate constants through spans. by @schweitzpgi in https://github.com/NVIDIA/cuda-quantum/pull/2953
• Add support for some math functions inside kernels by @schweitzpgi in https://github.com/NVIDIA/cuda-quantum/pull/2989
• Advance Stim to 1.15 by @bmhowe23 in https://github.com/NVIDIA/cuda-quantum/pull/2877
• State preparation synthesis via MPS decomposition by @ACE07-Sev in https://github.com/NVIDIA/cuda-quantum/pull/2972
• Handling negative lower and upper bound of a slice by @sacpis in https://github.com/NVIDIA/cuda-quantum/pull/3022
• Add argument coercions by @schweitzpgi in https://github.com/NVIDIA/cuda-quantum/pull/3027
• Adding control on multilple qubits for C++ kernel builder by @sacpis in https://github.com/NVIDIA/cuda-quantum/pull/3052
• Update run_async to work with python API and add tests by @annagrin in https://github.com/NVIDIA/cuda-quantum/pull/3074
• Initial implementation of getting matrix for kernel by @Randl in https://github.com/NVIDIA/cuda-quantum/pull/3028
• Add a DSR compiler pass by @schweitzpgi in https://github.com/NVIDIA/cuda-quantum/pull/3145
• Introduce cudaq::contrib by @nvidia-dobri in https://github.com/NVIDIA/cuda-quantum/pull/3190
• Include python 3.13 by @mitchdz in https://github.com/NVIDIA/cuda-quantum/pull/3224
• Make ordering of matrix class configurable by @amccaskey in https://github.com/NVIDIA/cuda-quantum/pull/3126

New Contributors

• @Squirtle007 made their first contribution in https://github.com/NVIDIA/cuda-quantum/pull/2806
• @ACE07-Sev made their first contribution in https://github.com/NVIDIA/cuda-quantum/pull/2972
• @HanaGiatQM made their first contribution in https://github.com/NVIDIA/cuda-quantum/pull/2838
• @Randl made their first contribution in https://github.com/NVIDIA/cuda-quantum/pull/3028
• @denialhaag made their first contribution in https://github.com/NVIDIA/cuda-quantum/pull/3151

Full Changelog: https://github.com/NVIDIA/cuda-quantum/compare/0.11.0...0.12.0 Release created by workflow 16655085468.