...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical review >Adiabatic many-body state preparation and information transfer in quantum dot arrays
【24h】

Adiabatic many-body state preparation and information transfer in quantum dot arrays

机译：量子点阵列中的绝热多体态制备和信息传递

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Quantum simulation of many-body systems are one of the most interesting tasks of quantum technology. Among them is the preparation of a many-body system in its ground state when the vanishing energy gap makes the cooling mechanisms ineffective. Adiabatic theorem, as an alternative to cooling, can be exploited for driving the many-body system to its ground state. In this paper, we study two most common disorders in quantum dot arrays, namely exchange coupling fluctuations and hyperfine interaction, in adiabatic preparation of ground state in such systems. We show that the adiabatic ground-state preparation is highly robust against those disorder effects making it a good analog simulator. Moreover, we also study the adiabatic quantum information transfer, using singlet-triplet states, across a spin chain. In contrast to ground-state preparation the transfer mechanism is highly affected by disorder and in particular, the hyperfine interaction is very destructive for the performance. This suggests that for communication tasks across such arrays adiabatic evolution is not as effective and quantum quenches could be preferable.
机译：多体系统的量子模拟是量子技术中最有趣的任务之一。其中一个是在消失的能隙使冷却机制失效时，准备一个处于基态的多体系统。绝热定理可以作为冷却的替代方法，用于将多体系统推向基态。在本文中，我们研究了在这种系统的绝热制备中量子点阵列中两个最常见的紊乱，即交换耦合波动和超精细相互作用。我们表明，绝热基态准备对于那些无序效应具有很高的鲁棒性，使其成为一个很好的模拟模拟器。此外，我们还研究了通过单重态-三重态在自旋链上的绝热量子信息传递。与基态制备相反，转移机制受紊乱的影响很大，特别是超精细相互作用对性能非常有害。这表明，对于跨此类阵列的通信任务，绝热演化并不那么有效，而量子猝灭可能更可取。

著录项

  • 来源
    《Physical review》 |2015年第13期|134303.1-134303.7|共7页
  • 作者

    Umer Farooq; Abolfazl Bayat; Stefano Mancini; Sougato Bose;

  • 作者单位

    School of Science and Technology, Physics Division, University of Camerino, I-62032 Camerino, Italy ,INFN-Sezione di Perugia, Via A. Pascoli, I-06123 Perugia, Italy;

    Department of Physics and Astronomy, University College London, Gower St., London WC1E 6BT, United Kingdom;

    School of Science and Technology, Physics Division, University of Camerino, I-62032 Camerino, Italy ,INFN-Sezione di Perugia, Via A. Pascoli, I-06123 Perugia, Italy;

    Department of Physics and Astronomy, University College London, Gower St., London WC1E 6BT, United Kingdom;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    quantum dots; quantum communication;

    机译：量子点;量子通讯;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号