Higher-order methods for simulations on quantum computers

Higher-order methods for simulations on quantum computers
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DOI:
10.1103/physreva.60.1956
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发表时间:
1999-03
期刊:
影响因子:
2.9
通讯作者:
Andrew T. Sornborger;E. Stewart
Andrew T. Sornborger;E. Stewart
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Andrew T. Sornborger;E. Stewart

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为了在量子计算机上有效地实现用于量子模拟的多量子比特门,我们开发并提出了将exp[[minus]i(H[sub 1]+H[sub 2]+[center dot][center dot][center dot])[Delta]t]重新表示为因子exp[[minus]iH[sub 1][Delta]t],exp[[minus]iH[sub 2][Delta]t],[hor ellipssis]的乘积的方法,其精确到[Delta]t的三阶或四阶。我们得到的方法是辛方法的一种扩展形式,也可以用于经典计算机上的经典哈密顿积分。我们得到积分和无理数的方法,并找到在这两种情况下最有效的方法。[版权所有] [ital 1999] [ital The American Physical Society]
To implement many-qubit gates for use in quantum simulations on quantum computers efficiently, we develop and present methods reexpressing exp[[minus]i(H[sub 1]+H[sub 2]+[center dot][center dot][center dot])[Delta]t] as a product of factors exp[[minus]iH[sub 1][Delta]t], exp[[minus]iH[sub 2][Delta]t],[hor ellipsis], which is accurate to third or fourth order in [Delta]t. The methods we derive are an extended form of the symplectic method, and can also be used for an integration of classical Hamiltonians on classical computers. We derive both integral and irrational methods, and find the most efficient methods in both cases. [copyright] [ital 1999] [ital The American Physical Society]