A Rydberg quantum simulator
A Rydberg quantum simulator
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DOI：
10.1038/nphys1614
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发表时间：
2010-05-01
期刊：
影响因子：
19.6
通讯作者：
Buechler, Hans Peter
中科院分区：
文献类型：
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作者：
Weimer, Hendrik;Mueller, Markus;Buechler, Hans Peter
通用量子模拟器是一种受控的量子装置，它可以再现任何其他具有短程相互作用的多粒子量子系统的动力学。这种动力学既可以指相干哈密顿演化，也可以指耗散开系统演化。在这里，我们提出激光激发的大间距光学或磁晶格中的里德伯原子为涉及n体相互作用的自旋模型提供了一个有效的通用量子模拟器，包括高阶的自旋模型。这将允许模拟涉及n粒子约束的奇异自旋模型的哈密顿量，如基塔耶夫环面码、彩色码和具有自旋液相的晶格规范理论。此外，我们的方法提供了基于工程n粒子储层耦合的纠缠态耗散制备的成分。我们架构的基本组成部分是使用辅助里德伯原子的高效高保真n量子位纠缠门，包括通过光泵浦的可能耗散时间步长。这使得通过一系列快速，并行和高保真的n粒子相干和耗散里德伯门来模拟系统的时间演化成为可能。
A universal quantum simulator is a controlled quantum device that reproduces the dynamics of any other many-particle quantum system with short-range interactions. This dynamics can refer to both coherent Hamiltonian and dissipative open-system evolution. Here we propose that laser-excited Rydberg atoms in large-spacing optical or magnetic lattices provide an efficient implementation of a universal quantum simulator for spin models involving n-body interactions, including such of higher order. This would allow the simulation of Hamiltonians of exotic spin models involving n-particle constraints, such as the Kitaev toric code, colour code and lattice gauge theories with spin-liquid phases. In addition, our approach provides the ingredients for dissipative preparation of entangled states based on engineering n-particle reservoir couplings. The basic building blocks of our architecture are efficient and high-fidelity n-qubit entangling gates using auxiliary Rydberg atoms, including a possible dissipative time step through optical pumping. This enables mimicking the time evolution of the system by a sequence of fast, parallel and high-fidelity n-particle coherent and dissipative Rydberg gates.