费米-哈伯德模型中电荷与自旋分离动力学的观测
量子物理
2020-10-19 v1
摘要
强关联量子系统产生了许多奇异的物理现象，包括高温超导。在量子计算机上模拟这些系统可避免经典方法带来的极高计算成本。然而，当前量子器件中存在的系统误差和退相干效应使得这一目标难以实现。在此，我们利用数字超导量子处理器上的16个量子比特模拟了一维费米-哈伯德模型的动力学。我们观测到在高度激发 regime 下电荷与自旋密度传播速度的分离，该 regime 超出了传统的准粒子图像。为最小化系统误差，我们引入了一种快速的精确门校准流程，足以捕获门参数的时间漂移。我们还采用了一系列误差缓解技术来减少退相干效应和残余系统误差。尽管电路中包含超过600个双量子比特门，这些流程使我们能够忠实模拟该模型的时间演化。我们的实验为利用现有量子器件实用化模拟强关联现象指明了一条路径。
引用
@article{arxiv.2010.07965,
title = {Observation of separated dynamics of charge and spin in the Fermi-Hubbard model},
author = {Frank Arute and Kunal Arya and Ryan Babbush and Dave Bacon and Joseph C. Bardin and Rami Barends and Andreas Bengtsson and Sergio Boixo and Michael Broughton and Bob B. Buckley and David A. Buell and Brian Burkett and Nicholas Bushnell and Yu Chen and Zijun Chen and Yu-An Chen and Ben Chiaro and Roberto Collins and Stephen J. Cotton and William Courtney and Sean Demura and Alan Derk and Andrew Dunsworth and Daniel Eppens and Thomas Eckl and Catherine Erickson and Edward Farhi and Austin Fowler and Brooks Foxen and Craig Gidney and Marissa Giustina and Rob Graff and Jonathan A. Gross and Steve Habegger and Matthew P. Harrigan and Alan Ho and Sabrina Hong and Trent Huang and William Huggins and Lev B. Ioffe and Sergei V. Isakov and Evan Jeffrey and Zhang Jiang and Cody Jones and Dvir Kafri and Kostyantyn Kechedzhi and Julian Kelly and Seon Kim and Paul V. Klimov and Alexander N. Korotkov and Fedor Kostritsa and David Landhuis and Pavel Laptev and Mike Lindmark and Erik Lucero and Michael Marthaler and Orion Martin and John M. Martinis and Anika Marusczyk and Sam McArdle and Jarrod R. McClean and Trevor McCourt and Matt McEwen and Anthony Megrant and Carlos Mejuto-Zaera and Xiao Mi and Masoud Mohseni and Wojciech Mruczkiewicz and Josh Mutus and Ofer Naaman and Matthew Neeley and Charles Neill and Hartmut Neven and Michael Newman and Murphy Yuezhen Niu and Thomas E. O'Brien and Eric Ostby and Bálint Pató and Andre Petukhov and Harald Putterman and Chris Quintana and Jan-Michael Reiner and Pedram Roushan and Nicholas C. Rubin and Daniel Sank and Kevin J. Satzinger and Vadim Smelyanskiy and Doug Strain and Kevin J. Sung and Peter Schmitteckert and Marco Szalay and Norm M. Tubman and Amit Vainsencher and Theodore White and Nicolas Vogt and Z. Jamie Yao and Ping Yeh and Adam Zalcman and Sebastian Zanker},
journal= {arXiv preprint arXiv:2010.07965},
year = {2020}
}
备注
20 pages, 15 figures