Exact

Exact Union RegExp

Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Transaction Science e2a6baa5b1 wai-quantum 0.3.35: time evolution of spin chains by TDVP, held to exact answers ... quantum_tdvp evolves a matrix-product state by the two-site time-dependent variational principle, a symmetric second-order sweep: - each bond goes forward half a step under its effective Hamiltonian, and the new centre goes back half a step under its one-site one; - the exponentials are Lanczos with full re-orthogonalisation, and a step that does not converge is halved; - bonds are split by a Jacobi SVD, so amplitudes resolve to rounding; - every bond's basis is completed with null vectors up to max_bond, which removes the projection error a product state's small bonds would cause. The referees are exact Krylov evolution of all amplitudes (up to 20 sites) and the free-fermion Ising quench at any length, including the Loschmidt echo. Checked: - complete bases are exact to rounding at any step size; - at 100 sites and bond 64 the critical quench stays within 1e-9 of the exact answer through t = 3, and past that the error follows the reported discarded weight; - runs are bit-identical across thread counts and natively vs wasm32-wasip2 (new pin); - the CLI command tdvp prints the same bytes natively and under WASI. A fourth-order Yoshida composition was measured as less accurate and slower, and was removed; the module docs record why. Co-Authored-By: Claude Opus 5.5 <[email protected]>		2026-10-05 11:13:38 -04:00
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arch_factoring.rs	wai-quantum 0.3.29: the architecture around the code, priced, and the 2025 factoring machine re-run	2026-10-04 17:33:48 -04:00
bell.rs	wai-quantum 0.3.13: mixed states, and a bound that classical physics cannot reach	2026-09-07 03:47:38 -04:00
dmrg_chain.rs	wai-quantum 0.3.34: ground states of spin chains by DMRG, held to exact answers	2026-10-05 09:50:20 -04:00
gbs_check.rs	wai-quantum 0.3.27: Gaussian boson sampling, exactly	2026-10-04 16:19:25 -04:00
ldpc_memory.rs	wai-quantum 0.3.30: qLDPC memory at circuit level, re-derived from the circuit up	2026-10-04 21:30:40 -04:00
qec_frame.rs	wai-quantum 0.3.25: error correction at circuit level, sampled, modelled and decoded exactly	2026-10-04 14:21:56 -04:00
qec_threshold.rs	wai-quantum 0.3.25: error correction at circuit level, sampled, modelled and decoded exactly	2026-10-04 14:21:56 -04:00
qio_gset.rs	wai-quantum 0.3.31: quantum-inspired optimisation, a re-runnable classical baseline	2026-10-05 05:27:49 -04:00
receipt.rs	wai-quantum 0.3.13: mixed states, and a bound that classical physics cannot reach	2026-09-07 03:47:38 -04:00
sv_run.rs	wai-quantum 0.3.28: the dense state vector at any angle, the same bits threaded or not	2026-10-04 17:01:39 -04:00
tdvp_quench.rs	wai-quantum 0.3.35: time evolution of spin chains by TDVP, held to exact answers	2026-10-05 11:13:38 -04:00
threshold.rs	wai-quantum 0.3.13: mixed states, and a bound that classical physics cannot reach	2026-09-07 03:47:38 -04:00
tn_path.rs	wai-quantum 0.3.26: tensor-network contraction, hyper-optimised, sliced, bit-identical	2026-10-04 16:03:22 -04:00
uf_bench.rs	wai-quantum 0.3.32: union-find decoding in near-linear time	2026-10-05 07:46:12 -04:00
utility.rs	wai-quantum 0.3.22: sparse Pauli dynamics at utility scale, and identical bits on every platform	2026-10-01 15:13:52 -04:00
utility_bptn.rs	wai-quantum 0.3.23: belief-propagation tensor networks, a second method for the same circuits	2026-10-01 20:40:14 -04:00
utility_mz.rs	wai-quantum 0.3.22: sparse Pauli dynamics at utility scale, and identical bits on every platform	2026-10-01 15:13:52 -04:00