论文标题
量子退火器的多量校正
Multi-Qubit Correction for Quantum Annealers
论文作者
论文摘要
我们将\ emph {多量校正}（MQC）作为量子退火器的新型后处理方法，该方法将开放系统中的进化视为Gibbs采样器，并将一组激发态降低到具有较低能量值的新合成状态。从给定（ISING）哈密顿量的基态取样后，MQC比较了激发态对识别虚拟隧道的对 - 即同时改变其状态的一组量子，可能会导致具有较低能量价值的新状态，并且依次趋于地面状态。使用D-WAVE 2000Q量子退火器的实验结果表明，与最近的硬件/软件在量子退火领域的进步相比，MQC发现了具有明显较低的能量值的样品，并提高了结果的可重复性，例如自旋反向反转变换，经典的后置术技术，以及在接班人间延迟之间增加了样本间延迟。
We present \emph{multi-qubit correction} (MQC) as a novel postprocessing method for quantum annealers that views the evolution in an open-system as a Gibbs sampler and reduces a set of excited states to a new synthetic state with lower energy value. After sampling from the ground state of a given (Ising) Hamiltonian, MQC compares pairs of excited states to recognize virtual tunnels--i.e., a group of qubits that changing their states simultaneously can result in a new state with lower energy value--and successively converges to the ground state. Experimental results using D-Wave 2000Q quantum annealers demonstrate that MQC finds samples with notably lower energy values and improves the reproducibility of results when compared to recent hardware/software advances in the realm of quantum annealing, such as spin-reversal transforms, classical postprocessing techniques, and increased inter-sample delay between successive measurements.
