Qiskit / qiskit / 8426827972
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Oxidize two qubit basis decomposer (#12010)

* Oxidize TwoQubitBasisDecomposer

This commit is the second part of migrating the default 2q unitary
synthesis method to leverage parallel rust as described in #8774. The
Eventual goal is to be able to run unitary synthesis in parallel for all
the unitary matrices in a single call from the `UnitarySynthesis` pass.
The TwoQubitBasisDecomposer class is one of the default decomposers used
by the unitary synthesis plugin. After this we can build an interface
that will run the decomposition in parallel for a given decomposer.

This commit re-implements the TwoQubitBasisDecomposer class in rust. It
keeps the same algorithm from the previous python version but implements
it in rust. This builds off of #11946 and for the operation of the
decomposer class the TwoQubitWeylDecomposition class is used solely
through rust.

This commit depends on #11946 and will need to be rebased after #11946
is merged.

Fixes #12004

* Fix errors after rebase

* Fix traces method

* Fix pulse optimized synthesis

* Add release notes

* Fix lint

* Use consts for static decomposition arrays

* Run cargo fmt

* Handle basis_fidelity inside unitary synthesis path

* Cast input to TwoQubitBasisDecomposer.num_basis_gates

* Use statics instead of consts

* Pre-allocate 2q circuit sequence outside the pulse optimal path.

590 of 681 new or added lines in 4 files covered. (86.64%)

16 existing lines in 4 files now uncovered.

60154 of 67387 relevant lines covered (89.27%)

234935.92 hits per line

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 -1.42% qiskit/synthesis/two_qubit/two_qubit_decompose.py
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Uncovered Existing Lines

Lines Coverage ∆ File
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4
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 -1.26% crates/accelerate/src/euler_one_qubit_decomposer.rs
Jobs
ID Job ID Ran Files Coverage
1 8426827972.1 821
89.27
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Source Files on build 8426827972