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相关概念视频

Atomic Nuclei: Nuclear Relaxation Processes01:23

Atomic Nuclei: Nuclear Relaxation Processes

598
In the absence of an external magnetic field, nuclear spin states are degenerate and randomly oriented. When a magnetic field is applied, the spins begin to precess and orient themselves along (lower energy) or against (higher energy) the direction of the field. At equilibrium, a slight excess population of spins exists in the lower energy state. Because the direction of the magnetic field is fixed as the z-axis,  the precessing magnetic moments are randomly oriented around the z-axis.
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Mass Analyzers: Common Types01:19

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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相关实验视频

Updated: May 20, 2025

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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使用被困离子量子处理器验证的随机性

Minzhao Liu1,2,3, Ruslan Shaydulin4, Pradeep Niroula1

  • 1Global Technology Applied Research, JPMorganChase, New York, NY, USA.

Nature
|March 27, 2025
PubMed
概括
此摘要是机器生成的。

研究人员使用在线访问的量子计算机生成可验证的随机位数. 这一突破利用量子计算能力来实现安全的随机性,

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相关实验视频

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科学领域:

  • 量子信息科学
  • 计算安全
  • 量子计算硬件

背景情况:

  • 量子计算机提供超越经典系统的能力, 但实际应用具有挑战性.
  • 在安全应用中生成带有保证的随机位是至关重要的,但在传统上是不可能的.
  • 不值得信赖的远程量子设备对可验证的计算构成挑战.

研究的目的:

  • 使用被困离子量子计算机演示可验证的随机位数的生成.
  • 为了安全,利用随机电路采样的经典硬度.
  • 为了验证由不可信的量子服务器产生的随机性.

主要方法:

  • 使用了56位量子量子计算机.
  • 开发了一个客户端向远程服务器发送量子电路的协议.
  • 使用经典验证服务器结果与量子硬度假设.
  • 分析了对近期对手的安全性.

主要成果:

  • 在互联网上成功生成了可验证的随机位.
  • 在受限制的对手假设下, 证实了71,313位的.
  • 获得了高的经典验证性能 (1.1 × 10^18 FLOPS).

结论:

  • 使用当前量子硬件生成认证的随机位的可行方法.
  • 这项工作代表了近期量子计算机的实际应用.
  • 该协议显示了分布式量子计算场景中安全随机生成的潜力.