QBdt debugging

QBdt error amortization suffered from an out-of-precision bug; this has been (completely) fixed.

Full Changelog: vm6502q.v9.9.22...vm6502q.v9.9.23

sha1sum results:
d31a4dd5624ae32eac6fde9c0e5d1ba4ae55113c libqrack-macosx_14_0_arm64.zip
507e8f2ec40cb82420dd9a644c4c2963b873cf1d libqrack-manylinux2014_x86_64.zip
62f7ac48c1a6f3b1e274984c775873801f393e82 libqrack-manylinux_2_35_x86_64.zip
ced693d326d76e82889fc9b5be0fe29b5e5eda7d libqrack-manylinux_2_39_x86_64.zip
f8bb6f5f5f874127b5b899b974fe6b2f86198b41 libqrack-win-amd64.zip

OpenCL kernel (and other) optimizations; Ubuntu PowerPC fix

Various micro-optimizations have been added, including OpenCL kernel optimizations. Because of OpenCL kernel updates, perform the following commands as necessary in the qrack repository directory:

$ make clean
$ cmake ..
$ ./qrack_cl_precompile

Full Changelog: vm6502q.v9.9.13...vm6502q.v9.9.22

sha1sum results:
e3ad258882c26cc9b630f4188c233b386bb078f4 libqrack-macosx_14_0_arm64.zip
883c39946da742de2d628b26e5127722a2b8de1f libqrack-manylinux2014_x86_64.zip
43794d490e44f52211244671cb7b75f495979f95 libqrack-manylinux_2_35_x86_64.zip
b6cedf5ec4742afbf78fb62a997acccdc7ed1cd3 libqrack-manylinux_2_39_x86_64.zip
0482af5afc787b307be89c6d94f6ab7996e68361 libqrack-win-amd64.zip

QUnitStateVector and QEngineOCL debugging

A new class QUnitStateVector can hold Schmidt-decomposed representation of state vectors. For now, specifically, it is used only for near-Clifford simulation with QUnitClifford.

A long-standing edge case in QEngineOCL::MAll() has also been fixed.

Full Changelog: vm6502q.v9.9.9...vm6502q.v9.9.13

sha1sum results:
79f7b51945a02769ff45892363d34831c0549587 libqrack-macosx_14_0_arm64.zip
40dee73bb65b11daaf8a46b15bdf965d34b4bb6a libqrack-manylinux2014_x86_64.zip
5d095eb03fbbb4481cbe2aca820002ef91fce45c libqrack-manylinux_2_35_x86_64.zip
102138935656acee20c4758c07cb1aa0997f484f libqrack-manylinux_2_39_x86_64.zip
004c2fd26a79be9bb62a530920e52d61f3fc1bbd libqrack-win-amd64.zip

Random number generation improvements

Minor improvements have been made to Qrack's random number generator API. Most importantly, 32 divisions have been replaced with 32 multiplications when generating a random float with Rand(). Another possible point of improvement is that most-significant bit of the raw random bit stream now corresponds with most-significant bit of Rand(), where some devices and services for random number generation will tend to prioritize most-significant bit as slightly less biased for randomness than least-significant.

Full Changelog: vm6502q.v9.9.8...vm6502q.v9.9.9

sha1sum results:
767fbb85311ce2fb8c0054a1db06a091015cc8f6 libqrack-macosx_14_0_arm64.zip
5154b8903f6dd0bc473c2b8e084ccea0eb0e8a8a libqrack-manylinux2014_x86_64.zip
8e06eda30d6c219650be5ecc3671b013eb85e01e libqrack-manylinux_2_35_x86_64.zip
816ee3b11dc944d65d5358ab0ee1ff99d01f9253 libqrack-manylinux_2_39_x86_64.zip
c4d91a6a5fa2c62b5fef93b006de79d473b23257 libqrack-win-amd64.zip

Debug shared library observables API

This release fixes bugs in the observables API of the shared library. (It also fixes 16-bit floating-point builds, but this does not affect the packaged artifacts.)

Full Changelog: vm6502q.v9.9.7...vm6502q.v9.9.8

sha1sum results:
bfcb8d4947438169d41b2239bd0a23d7cdd41324 libqrack-macosx_14_0_arm64.zip
87531e6d58f1a693f63ab246726c8b31a118781c libqrack-manylinux2014_x86_64.zip
bcb49f1ac34ca02db98e1a81d1e24103637aee73 libqrack-manylinux_2_35_x86_64.zip
911e515a4ef76f8e45ed7003d8ced609205b83e9 libqrack-manylinux_2_39_x86_64.zip
89bf709ebe9de530d620b26192b1c5da0734e2d2 libqrack-win-amd64.zip

QUnit refactor

This patch release refactors QUnit for code clarity and reuse. No bugs have been fixed; no features have been added; the performance differential might be entirely negligible. However, the improvement in source code is authoritative.

Full Changelog: vm6502q.v9.9.6...vm6502q.v9.9.7

sha1sum results:
d23b9a4baacb67dbcd798640fa3932bf676789a9 libqrack-macosx_14_0_arm64.zip
353f36459841516fa67b0a2363b22ace82816ef2 libqrack-manylinux2014_x86_64.zip
ada749dc83ab4eb195066b84c1e33f6f7129eaaf libqrack-manylinux_2_35_x86_64.zip
5c501223e7c12a479d61606cf89e988a1d5d3c6c libqrack-manylinux_2_39_x86_64.zip
061d1077293602adc4ecec4ed1bbb314cdb2be62 libqrack-win-amd64.zip

Fixed-point QUnit

QUnit now takes advantage of fixed-point math, when available. (This should only improve QUnit precision while keeping the same rounding thresholds.)

Full Changelog: vm6502q.v9.9.1...vm6502q.v9.9.6

sha1sum results:
bc68840a315f6cf9ff75b5d4b2672dcf05e418d7 libqrack-macosx_14_0_arm64.zip
fa3e5a79877c2b2237c713d63b1893b9e3357d4a libqrack-manylinux2014_x86_64.zip
a849c838210f59a1ea750baeb5f58baef0023657 libqrack-manylinux_2_35_x86_64.zip
7776578540be80d20825ee237b1d8bf5f8cdcba3 libqrack-manylinux_2_39_x86_64.zip
e3526da89cd1385847a9fa86716718458c0b3969 libqrack-win-amd64.zip

Debug multi-GPU Clifford+RZ environment variable

This release fixes a bug that prevented custom tuning of the maximum ancillary qubit count in QStabilizerHybrid via QRACK_MAX_PAGING_QB. (This mostly affects cases of multi-GPU simulation with near-Clifford optimization, only.)

Full Changelog: vm6502q.v9.9.0...vm6502q.v9.9.1

sha1sum results:
2e567aab94b5f5d200417378bd5529d0351c53c2 libqrack-macosx_14_0_arm64.zip
b102c8c0d702d2629962e8a90a1affe106ba6f74 libqrack-manylinux2014_x86_64.zip
1a9ebef40c3992a7ae52905040830834e93c2080 libqrack-manylinux_2_35_x86_64.zip
8f8d209cd8785e93d1dda5497b2ba1acca69a14d libqrack-manylinux_2_39_x86_64.zip
bbe0e48501d7f79f8e9d6f8694e79c7e97cad847 libqrack-win-amd64.zip

Optional depolarizing noise layer

This release adds an (optional) depolarizing noise simulation "layer" to Qrack, for simple noisy simulation, such as to test and aid the development of quantum error mitigation or quantum error correction.

What's Changed

• Add PhaseRootNMask to QInterface, implement for QEngineCPU by @jpacold in #1009
• Windows artifact build by @WrathfulSpatula in #1010
• Fix automatic Windows artifacts build by @WrathfulSpatula in #1011
• Fixed-point for QBDD by @WrathfulSpatula in #1013
• QInterfaceNoisy by @WrathfulSpatula in #1014

New Contributors

• @jpacold made their first contribution in #1009

Full Changelog: vm6502q.v9.7.0...vm6502q.v9.9.0

sha1sum results:
9a5dc6240a6685a4ae5320d10b34700483260188 libqrack-macosx_10_4_universal2.zip
4d9727b13d11b7fe65a7060fc1d3b1346ec0a063 libqrack-manylinux2014_x86_64.zip
a30508dd45ed15a14c2780922bc9f0af527981a8 libqrack-manylinux_2_35_x86_64.zip
694a66d158539f5fa73b459ac1e71da620440784 libqrack-manylinux_2_39_x86_64.zip
e62348ff023848fa3a611c0bf3bb9cbf69c40faa libqrack-win-amd64.zip

Observables API

This release greatly expands the API for expectation values and variance, via both static and shared linkage.

File SHA-1 sums:

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437373a00e06e03fe84cd04d3f91d14eedf0fff6 qrack_linux_arm64_benchmarks
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