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Papers · State Preparation · Resource lemma formalized

Trading T gates for dirty qubits in state preparation and unitary synthesis

Guang Hao Low, Vadym Kliuchnikov, Luke Schaeffer · 2018. This is a source-facing partial reproduction page: it separates the paper statement, the finite Lean surface already closed in ASPBE, and the paper-wide work still queued.

Open source paper ↗

Source contract

Start from the numbered statement in the paper

Source anchors. Eq. (2) Eq. (5) Table 2 Fig. 1(c,d)

What these source locations say. Eq. (2) states the arbitrary target-state problem; Eq. (5) gives the coherent data-lookup interface; Table 2 and Fig. 1(c,d) expose the SelectSwap T-count/space tradeoff used by the finite arithmetic witness.

Formalized now

The theorem surface ASPBE is allowed to claim today

The clean-qubit SelectSwap T-count formula at the repository arithmetic tier, including N=16, b=1 values 72 at lambda=1 and 48 at lambda=4, plus the strict finite comparison 48<72.

Lean evidence for the formalized surface

These declarations are the proof authority for the finite theorem or resource lemma described above.

Paper reproduction boundary

What is deliberately not claimed yet

Approximate Clifford+T state preparation, coherent lookup/SelectSwap semantics, dirty-qubit correctness, error accounting, and the full asymptotic optimality theorem.

Status rule. A finite witness, typed circuit, or resource lemma is not silently promoted to the source paper's arbitrary-width or asymptotic theorem.