Experimental linear-optics simulation of ground-state of an Ising spin chain

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作者：
Peng Xue
Xian Zhan
Zhihao Bian
机构：
[1] Southeast University,Department of Physics
[2] East China Normal University,State Key Laboratory of Precision Spectroscopy
来源：
Scientific Reports | / 7卷
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摘要：
We experimentally demonstrate a photonic quantum simulator: by using a two-spin Ising chain (an isolated dimer) as an example, we encode the wavefunction of the ground state with a pair of entangled photons. The effect of magnetic fields, leading to a critical modification of the correlation between two spins, can be simulated by just local operations. With the ratio of simulated magnetic fields and coupling strength increasing, the ground state of the system changes from a product state to an entangled state and back to another product state. The simulated ground states can be distinguished and the transformations between them can be observed by measuring correlations between photons. This simulation of the Ising model with linear quantum optics opens the door to the future studies which connect quantum information and condensed matter physics.
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