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arXiv 1906.00403quant-phcond-mat.mes-hall
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一般两体自旋1/2相互作用的哈密顿工程

Hamiltonian engineering of general two-body spin-1/2 interactions

K. I. O. Ben 'Attar, D. Farfurnik, N. Bar-Gill

摘要:

固态系统中的自旋哈密顿工程在从量子信息处理和量子模拟到多体物理的新研究的各种应用中起着关键作用。通过分析一般两体自旋为1/2的哈密顿量的不可约形式,我们确定了所有可互换的相互作用项使用旋转脉冲。基于这种识别,我们得到新的脉冲序列,定义的二十面体对称群,提供最普遍的可实现的相互作用项的操作。我们证明,与传统的克利福德旋转,这些序列提供的优势,创造塞曼条款必不可少的磁传感,并可用于产生新的相互作用形式。产生期望的相互作用项所需的脉冲的确切序列可以从线性规划算法确定。为了实现序列,我们提出了两种实验方法,涉及脉冲产品分解,和非共振驱动。由此产生的工程哈密顿量可以有助于理解多体物理,并导致创造新的量子模拟器和产生高度纠缠态,从而开辟了量子传感和信息处理的途径。

英文摘要:

Spin Hamiltonian engineering in solid-state systems plays a key role in a variety of applications ranging from quantum information processing and quantum simulations to novel studies of many-body physics. By analyzing the irreducible form of a general two-body spin-1/2 Hamiltonian, we identify all interchangeable interaction terms using rotation pulses. Based on this identification, we derive novel pulse sequences, defined by an icosahedral symmetry group, providing the most general achievable manipulation of interaction terms. We demonstrate that, compared to conventional Clifford rotations, these sequences offer advantages for creating Zeeman terms essential for magnetic sensing, and could be utilized to generate new interaction forms. The exact series of pulses required to generate desired interaction terms can be determined from a linear programming algorithm. For realizing the sequences, we propose two experimental approaches, involving pulse product de-composition, and off-resonant driving. Resulting engineered Hamiltonians could contribute to the understanding of many-body physics, and result in the creation of novel quantum simulators and the generation of highly-entangled states, thereby opening avenues in quantum sensing and information processing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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