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arXiv 2104.11235quant-phcond-mat.quant-gas
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囚禁离子QCCD量子计算机上张量网络的纠缠

Entanglement from tensor networks on a trapped-ion QCCD quantum computer

Michael Foss-Feig, Stephen Ragole, Andrew Potter, Joan Dreiling, Caroline Figgatt, John Gaebler, Alex Hall, Steven Moses, Juan Pino, Ben Spaun, Brian Neyenhuis, David Hayes

摘要:

在量子电路期间选择性地测量、初始化和重用量子比特的能力使得能够将某些张量网络状态的空间结构映射到量子线路的动力学上,从而在使用量子计算机模拟具有有限纠缠的多体系统时实现显著的资源节省。我们实验证明了这种方法的量子模拟的显着好处:除了所有的关联函数,纠缠结构的无限系统-特别是半链纠缠谱-方便地编码在一个小寄存器的“键量子位”,可以提取相对容易。利用一台配备有选择性中间电路测量和复位的囚禁离子QCCD量子计算机,我们直接在热力学极限下定量地确定了相关自旋链的近临界纠缠熵,并表明其相变在扩展键量子位寄存器后很快得到解决.

英文摘要:

The ability to selectively measure, initialize, and reuse qubits during a quantum circuit enables a mapping of the spatial structure of certain tensor-network states onto the dynamics of quantum circuits, thereby achieving dramatic resource savings when using a quantum computer to simulate many-body systems with limited entanglement. We experimentally demonstrate a significant benefit of this approach to quantum simulation: In addition to all correlation functions, the entanglement structure of an infinite system -- specifically the half-chain entanglement spectrum -- is conveniently encoded within a small register of "bond qubits" and can be extracted with relative ease. Using a trapped-ion QCCD quantum computer equipped with selective mid-circuit measurement and reset, we quantitatively determine the near-critical entanglement entropy of a correlated spin chain directly in the thermodynamic limit and show that its phase transition becomes quickly resolved upon expanding the bond-qubit register.

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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