Vanadyl spin qubit 2D arrays and their integration on superconducting resonators,Materials Horizons

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Vanadyl spin qubit 2D arrays and their integration on superconducting resonators
Materials Horizons ( IF 12.2 ) Pub Date : 2019/12/09 , DOI: 10.1039/c9mh01594a
Ainhoa Urtizberea _{1,

2,

3,

4,

5} , Eva Natividad _{1,

2,

3,

4,

5} , Pablo J. Alonso _{1,

2,

3,

4,

5} , Laura Pérez-Martínez _{1,

2,

3,

4,

5} , Miguel A. Andrés _{1,

2,

3,

4,

5} , Ignacio Gascón _{1,

2,

3,

4,

5} , Ignacio Gimeno _{1,

2,

3,

4,

5} , Fernando Luis _{1,

2,

3,

4,

5} , Olivier Roubeau _{1,

2,

3,

4,

5}

Affiliation

Vanadyl systems have been shown to possess superior quantum coherence among molecular spin qubits. Meanwhile two-dimensional (2D) networks of spin qubit nodes could provide a means to achieve the control of qubit localization and orientation required for implementation of molecular spin qubits in hybrid solid-state devices. Here, the 2D metal–organic framework [{VO(TCPP)}Zn₂(H₂O)₂]_∞ is reported and its vanadyl porphyrin node is shown to exhibit superior spin dynamics and to enable coherent spin manipulations, making it a valid spin qubit candidate. Nanodomains of the MOF 2D coordination planes are efficiently formed at the air–water interface, first under Langmuir–Schaefer conditions, allowing mono- and multiple layer deposits to be transferred to a variety of substrates. Similar nanodomains are then successfully formed in situ on the surface of Nb superconducting coplanar resonators. Transmission measurements with a resonator with a 14 μm-wide constriction allow to estimate that the single spin-photon coupling G₁ of the vanadyl spins in the nanodomains is close to being optimal, at ca. 0.5 Hz. Altogether, these results provide the basis for developing a viable hybrid quantum computing architecture.

中文翻译：

钒基自旋量子位二维阵列及其在超导谐振器上的集成

钒基系统已显示出在分子自旋量子位之间具有优异的量子相干性。同时，自旋量子位节点的二维（2D）网络可以提供一种方法，以实现对混合固态设备中实现分子自旋量子位所需的量子位定位和取向的控制。在这里，二维金属有机框架[{VO（TCPP）} Zn ₂（H ₂ O）₂ ] _∞据报道，它的钒基卟啉结点显示出优异的自旋动力学，并能够进行相干自旋操纵，使其成为有效的自旋量子比特候选物。首先在Langmuir-Schaefer条件下，在空气-水界面上有效地形成了MOF 2D协调平面的纳米域，从而使单层和多层沉积物转移到各种基质上。然后成功地在Nb超导共面谐振器的表面上原位成功地形成了类似的纳米域。用具有14μm宽的收缩部的谐振器进行的传输测量允许估计在纳米域中钒基自旋的单自旋-光子耦合G ₁接近于最佳。0.5赫兹总之，这些结果为开发可行的混合量子计算体系结构提供了基础。

更新日期：2020-03-09

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