实验实现了对 32 自旋伊辛链的压缩量子模拟。

Experimental realization of a compressed quantum simulation of a 32-spin Ising chain.

机构信息

Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230036, People's Republic of China.

Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230036, People's Republic of China and Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, People's Republic of China.

出版信息

Phys Rev Lett. 2014 Jun 6;112(22):220501. doi: 10.1103/PhysRevLett.112.220501. Epub 2014 Jun 2.

DOI:10.1103/PhysRevLett.112.220501

PMID:24949746

Abstract

Certain n-qubit quantum systems can be faithfully simulated by quantum circuits with only O(log(n)) qubits [B. Kraus, Phys. Rev. Lett. 107, 250503 (2011)]. Here we report an experimental realization of this compressed quantum simulation on a one-dimensional Ising chain. By utilizing an nuclear magnetic resonance quantum simulator with only five qubits, the property of ground-state magnetization of an open-boundary 32-spin Ising model is experimentally simulated, prefacing the expected quantum phase transition in the thermodynamic limit. This experimental protocol can be straightforwardly extended to systems with hundreds of spins by compressing them into up to merely 10-qubit systems. Our experiment paves the way for exploring physical phenomena in large-scale quantum systems with quantum simulators under current technology.

摘要

某些 n 量子比特量子系统可以通过仅具有 O(log(n))量子比特的量子电路进行精确模拟[B. Kraus, Phys. Rev. Lett. 107, 250503 (2011)]。在这里，我们在一维伊辛链上实现了这种压缩量子模拟。通过利用仅具有五个量子比特的核磁共振量子模拟器，我们实验模拟了开边界 32 自旋伊辛模型的基态磁化强度的性质，预示了在热力学极限下的预期量子相变。通过将系统压缩到仅 10 量子比特系统中，这个实验方案可以直接扩展到具有数百个自旋的系统。我们的实验为在当前技术下利用量子模拟器探索大规模量子系统中的物理现象铺平了道路。