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The thermodynamic processes can be classified into reversible and irreversible processes. The processes that can be restored to their initial state are called reversible processes. It is only possible if the process is in quasi-static equilibrium, i.e., it takes place in infinitesimally small steps, and the system remains at equilibrium However, these are ideal processes and do not occur naturally. An ideal system undergoing a reversible process is always in thermodynamic equilibrium within...
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The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:
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In the Carnot engine, which achieves the maximum efficiency between two reservoirs of fixed temperatures, the total change in entropy is zero. The observation can be generalized by considering any reversible cyclic process consisting of many Carnot cycles. Thus, it can be stated that the total entropy change of any ideal reversible cycle is zero.
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相关实验视频

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Large Scale Energy Efficient Sensor Network Routing Using a Quantum Processor Unit
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量子路由具有快速反转的量子路由.

Aniruddha Bapat1,2, Andrew M Childs1,3,4, Alexey V Gorshkov1,2

  • 1Joint Center for Quantum Information and Computer Science, NIST/University of Maryland, College Park, Maryland 20742, USA.

Quantum (Vienna, Austria)
|August 8, 2023
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概括
此摘要是机器生成的。

我们开发了新的量子路由协议,其性能优于传统的基于SWAP的方法. 我们的算法实现了更快的量子路由时间,为量子计算架构中的量子位排列提供了显著的优势.

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科学领域:

  • 量子信息科学 量子信息科学
  • 量子计算算法 量子计算算法
  • 量子通信协议 量子通信协议

背景情况:

  • 有效地路由量子比特对于可扩展的量子计算和通信至关重要.
  • 基于SWAP的现有协议在交互约束下面临速度和可扩展性的限制.
  • 任意量子位变换是量子算法的基本操作.

研究的目的:

  • 开发用于在相互作用约束下实现任意量子位变换的新方法.
  • 为了证明对现有的基于SWAP的路由协议的量子优势.
  • 为了改善各种量子计算架构和排列类型的量子路由时间.

主要方法:

  • 使用协议来快速逆转沿着路径的量子比特的顺序.
  • 开发了新的量子路由算法,在长度为n的路径上与最近邻方相互作用.
  • 在路径和一般图表上分析了涉及k个量子位的稀疏排列的路由时间.

主要成果:

  • 实现的量子路由时间最多为 (1-ε) n,在路径上优于基于SWAP的协议 (n-1).
  • 证明了比基于SWAP的路由具有量子优势,随机排列的预期路由时间接近2n/3.
  • 开发了稀疏排列算法,路径上的路由时间为n/3 + O(k^2),图形上的路由时间为2r/3 + O(k^2).

结论:

  • 与基于SWAP的方法相比,所介绍的量子路由方法提供了显著的加速.
  • 这些协议为像网格这样的现实量子计算架构提供了改进的量子路由时间.
  • 这些发现为更高效地实现需要复杂量子位变换的量子算法铺平了道路.