Universal quantum computation and quantum error correction with ultracold atomic mixtures
Universal quantum computation and quantum error correction with ultracold atomic mixtures
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DOI：
10.1088/2058-9565/ac2d39
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发表时间：
2022-01-01
影响因子：
6.7
通讯作者：
Hauke, Philipp
中科院分区：
文献类型：
--
作者：
Kasper, Valentin;Gonzalez-Cuadra, Daniel;Hauke, Philipp
量子信息平台在控制多体纠缠和实现量子纠错方面取得了很大进展，但在相同的设置下实现这两方面仍然是一个挑战。在这里，我们提出了两种超冷原子的混合物，作为具有远程纠缠门的通用量子计算平台，同时提供了量子纠错的自然候选者。在这种设置中，一个原子物种实现了可调长度的局部集体自旋，形成了基本的信息单位。第二种原子产生声子激发，用于纠缠集体自旋。最后，我们讨论了Gottesman-Kitaev-Preskill码的有限维版本，以保护在集体自旋中编码的量子信息，为在超冷原子系统中实现通用容错量子计算开辟了可能性。
Quantum information platforms made great progress in the control of many-body entanglement and the implementation of quantum error correction, but it remains a challenge to realize both in the same setup. Here, we propose a mixture of two ultracold atomic species as a platform for universal quantum computation with long-range entangling gates, while providing a natural candidate for quantum error-correction. In this proposed setup, one atomic species realizes localized collective spins of tunable length, which form the fundamental unit of information. The second atomic species yields phononic excitations, which are used to entangle collective spins. Finally, we discuss a finite-dimensional version of the Gottesman-Kitaev-Preskill code to protect quantum information encoded in the collective spins, opening up the possibility to universal fault-tolerant quantum computation in ultracold atom systems.