Domain-wall confinement and dynamics in a quantum simulator
Domain-wall confinement and dynamics in a quantum simulator
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DOI：
10.1038/s41567-021-01194-3
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发表时间：
2019-12
期刊：
影响因子：
19.6
通讯作者：
W. L. Tan;P. Becker;F. Liu;G. Pagano;K. Collins;A. De;Lei Feng;H. Kaplan;A. Kyprianidis;Rex Lundgren;W. Morong;Seth Whitsitt;A. Gorshkov;C. Monroe
中科院分区：
文献类型：
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作者：
W. L. Tan;P. Becker;F. Liu;G. Pagano;K. Collins;A. De;Lei Feng;H. Kaplan;A. Kyprianidis;Rex Lundgren;W. Morong;Seth Whitsitt;A. Gorshkov;C. Monroe
受到约束的粒子经历一种吸引势，当它们分离时，这种吸引势无限制地增加。一个突出的例子是粒子物理学中的色禁闭，其中重子和介子由夸克禁闭产生。在低能量子多体系统中，当基元激发被限制在束缚准粒子中时，也会发生禁闭。在这里，我们报告的观察磁畴壁限制在相互作用的自旋链与捕获离子量子模拟。通过测量相关性如何传播，我们表明，禁闭可以抑制信息传播和热化在这样的多体系统。从非平衡猝灭动力学出发，定量地确定了畴壁束缚态的激发能。我们还研究了不同的淬火参数，在一个政权，这是很难与经典的计算机模型的畴壁激发的数量。这项工作展示了量子模拟器研究高能物理现象的能力，如夸克碰撞和弦断裂。
Particles subject to confinement experience an attractive potential that increases without bound as they separate. A prominent example is colour confinement in particle physics, in which baryons and mesons are produced by quark confinement. Confinement can also occur in low-energy quantum many-body systems when elementary excitations are confined into bound quasiparticles. Here we report the observation of magnetic domain-wall confinement in interacting spin chains with a trapped-ion quantum simulator. By measuring how correlations spread, we show that confinement can suppress information propagation and thermalization in such many-body systems. We quantitatively determine the excitation energy of domain-wall bound states from the non-equilibrium quench dynamics. We also study the number of domain-wall excitations created for different quench parameters, in a regime that is difficult to model with classical computers. This work demonstrates the capability of quantum simulators for investigating high-energy physics phenomena, such as quark collision and string breaking.