research
The Initial State Rewrites the Sampling Odds
StateDRIFT chooses Hamiltonian terms for the observable at hand, cutting a tested BeH2 two-qubit-gate count from 11,201 to 983 at fixed accuracy.
Summary
StateDRIFT chooses Hamiltonian terms for the observable at hand, cutting a tested BeH2 two-qubit-gate count from 11,201 to 983 at fixed accuracy.
StateDRIFT replaces coefficient-only qDRIFT sampling with a distribution optimized for the initial state and target observable. On tested lattice and molecular systems up to 18 qubits, it reduced estimator bias, variance and circuit depth while retaining a truncation bound. The BeH2 gate reduction is one reported case, not a universal ratio.
Why it matters
StateDRIFT chooses Hamiltonian terms for the observable at hand, cutting a tested BeH2 two-qubit-gate count from 11,201 to 983 at fixed accuracy.
Limits and context
- StateDRIFT replaces coefficient-only qDRIFT sampling with a distribution optimized for the initial state and target observable.
- The BeH2 gate reduction is one reported case, not a universal ratio.
Key claims
StateDRIFT chooses Hamiltonian terms for the observable at hand, cutting a tested BeH2 two-qubit-gate count from 11,201 to 983 at fixed accuracy.
Qualification: StateDRIFT replaces coefficient-only qDRIFT sampling with a distribution optimized for the initial state and target observable.
Evidence: source-2026-10-25-017
Sources
- arXiv preprint 2610.31515, original v1arXiv · primary research
Corrections
No corrections have been recorded for this story.