SDRP/MPS correspondence base case

With all-to-all connectivity (but 0 bond dimension), SDRP (Schmidt decomposition rounding parameter) should reproduce the effective behavior of MPS (matrix product states) when the rounding parameter is set to 1 or greater: this release fixes the QUnit implementation to realize this theoretical expectation. (Disable QStabilizerHybrid layer with isStabilizerHybrid=False constructor parameter for QrackSimulator and set the rounding parameter >= 1 to see this behavior, but the loss of "hybrid stabilizer" optimization should not qualitatively hurt performance in this case.)

Full Changelog:
unitaryfund/qrack@vm6502q.v9.10.0...vm6502q.v9.10.1
unitaryfund/pyqrack@v1.31.0...v1.31.1
v0.10.0...v0.10.1

sha1sum results:
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70c34bc099fa4b0c85e227e9dedfb26c2346ea44 dist/pennylane_qrack-0.10.1-py3-none-macosx_13_0_x86_64.whl
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d0839bc0769c6aaf657d45fe7cf80828b7ac7297 dist/pennylane-qrack-0.10.1.tar.gz

Better sampling; noise constructor argument

Multi-shot measurement in QEngine was previously handled in a way that was technically not thread-safe for C++. This has been fixed, and QEngine sampling has been parallelized further.

isNoisy constructor argument has been replaced with noise float parameter, which enable noisy simulation if the parameter is greater than 0 and sets the simulator instance noise level to the value of the constructor parameter.

Full Changelog:
unitaryfund/qrack@vm6502q.v9.9.62...vm6502q.v9.10.0
unitaryfund/pyqrack@v1.30.31...v1.31.0
v0.9.8...v0.10.0

sha1sum results:
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4a728e6556f280a16c4d3542f77e248d0258e336 pennylane_qrack-0.10.0.tar.gz

Debug QBDD high rounding

If QRACK_QBDT_SEPARABILITY_THRESHOLD were set too high, it would previously lead to segmentation faults. This release should allow the rounding parameter to be set almost arbitrarily high.

Full Changelog:
unitaryfund/qrack@vm6502q.v9.9.58...vm6502q.v9.9.62
unitaryfund/pyqrack@v1.30.30...v1.30.31
v0.9.7...v0.9.8

sha1sum results:
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c74adaf7fadcdb54cca6079b30b44bb5170635f2 pennylane_qrack-0.9.8.tar.gz

Debug qml.device() constructor parameters

qml.device() constructor parameters were previously not passed to the Qrack Catalyst device back end. This has been fixed.

Full Changelog: v0.9.6...v0.9.7

sha1sum results:
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90d1c4dce70e12868c2d151f1a39c5fb2668dd2e pennylane_qrack-0.9.7.tar.gz

Debug QBDD sampling

This release fixes doubling-up of QBDD measurement sampling.

Full Changelog:
unitaryfund/qrack@vm6502q.v9.9.54...vm6502q.v9.9.58
unitaryfund/pyqrack@v1.30.29...v1.30.30
v0.9.5...v0.9.6

sha1sum results:
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1404fc5662cdd7369abea3af27e53317bad4eb3f pennylane_qrack-0.9.6.tar.gz

QBDD optimization

A number of improvements have been made in QBDD simulation:

• PushStateVector() has more consistent flooring logic for very small contributions to overall state vector probability.
• Because QBDD gains little advantage from internal parallelism in most cases, internal parallelism in QBDD now defaults to OFF.
• If QBDD internal parallelism is off, then QTensorNetwork automatically parallelizes QBDD measurement sampling over shots

Full Changelog:
unitaryfund/qrack@vm6502q.v9.9.50...vm6502q.v9.9.54
unitaryfund/pyqrack@v1.30.28...v1.30.29
v0.9.4...v0.9.5

sha1sum results:
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4b7eb0de2d6772a7e938b945d997dbf3ee25dc66 pennylane_qrack-0.9.5.tar.gz

0-GPU edge case; env. vars.; precision

This release fixes the following:

• an edge case that leads to a segmentation fault when QStabilizerHybrid is used in the presence of 0 available OpenCL/CUDA devices,
• potentially inconsistent defaults for qubit-limit and rounding-parameter environment variables,
• and rounding neighborhood for separability checks,if we check a two-state qubit for eigenstate norm equality: "machine epsilon" in C++ is the difference between 1.0 and the next greater representable number; half this value is the difference between 1.0 and the next lower representable number; half this value is used for (L2-norm) rounding neighborhood for equality with 1.0 or 0.0 in two-state Hilbert spaces (which are bounded to that range and must normalize to 1.0).

Full Changelog:
unitaryfund/qrack@vm6502qv9.9.46...vm6502q.v9.9.50
unitaryfund/pyqrack@v1.30.26...v1.30.28
v0.9.3...v0.9.4

sha1sum results:
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eff203609424e7b96406ef778e8bcd751e5f6105 pennylane_qrack-0.9.4.tar.gz

Edge case segfault with 0 OpenCL/CUDA devices

This release fixes an edge case that leads to a segmentation fault, when QTensorNetwork is used in the presence of 0 available OpenCL/CUDA devices.

Full Changelog:
unitaryfund/qrack@vm6502q.v9.9.42...vm6502qv9.9.46
unitaryfund/pyqrack@v1.30.25...v1.30.26
v0.9.2...v0.9.3

sha1sum results:
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QBDD deadlock fix (and style)

A potential deadlock in QBDD Kronecker products has been fixed. Beyond that, several (non-breaking) function prototype changes have been made in accordance with standards for style.

Full Changelog:
unitaryfund/qrack@vm6502q.v9.9.37...vm6502q.v9.9.42
unitaryfund/pyqrack@v1.30.24...v1.30.25
v0.9.1...v0.9.2

sha1sum results:
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0faf76b8f234d16d69d167df429aaca8cf35056f pennylane_qrack-0.9.2.tar.gz

QBDD and stabilizer optimization

QBDD and stabilizer methods have been optimized. An incorrect initialization of a default QEngine property was also fixed in the default constructor (though the incorrect initialization likely had no consequence).

Full Changelog:
unitaryfund/qrack@vm6502q.v9.9.33...vm6502q.v9.9.37
unitaryfund/pyqrack@v1.30.23...v1.30.24
v0.9.0...v0.9.1

sha1sum results:
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