Scalable entanglement of nuclear spins mediated by electron exchange

The use of nuclear spins for quantum computation is limited by the difficulty in creating genuine quantum entanglement between distant nuclei. Current demonstrations of nuclear entanglement in semiconductors rely upon coupling the nuclei to a common electron, which is not a scalable strategy. Here we demonstrate a two-qubit Control-Z logic operation between the nuclei of two phosphorus atoms in a silicon device, separated by up to 20 nanometers. Each atom binds separate electrons, whose exchange interaction mediates the nuclear two-qubit gate. We prove that the nuclei are entangled by preparing and measuring Bell states with a fidelity of 76 +/- 5% and a concurrence of 0.67+/- 0.05. With this method, future progress in scaling up semiconductor spin qubits can be extended to the development of nuclear-spin based quantum computers., , , # Scalable entanglement of nuclear spins mediated by electron exchange

[https://doi.org/10.5061/dryad.brv15dvm5](https://doi.org/10.5061/dryad.brv15dvm5)

## Description of the data 

This is accompanying data for the journal article 'Scalable entanglement of nuclear spins mediated by electron exchange'.

## Outline of the dataset

The dataset consists of the following folders:

#### 1 - Main\_text

This folder contains the experimental data used to generate the figures in the main text of the article. It also contains the Jupyter notebook file **'Main_text_figure_plotting.ipynb'**, which can be used to plot this data. The data is partitioned into subfolders for each paper figure. The naming convention of the data is the following: `#A_B_C` where A is the number of the measurement for that date (i.e. #1 means this was the first measurement run that day for a given date), B is the name of the measurement that was run and C is the time at which the measurement was run in the format ...,