Data for: Electron readout contrast enhancement in the parallel nuclear regime of an exchange-coupled donor spin qubit system

Recent experiments on donor spin qubits in silicon have leveraged the exchange interaction between electrons bound to separate donor nuclei to perform two-qubit operations. A consistently observed yet unexplained phenomenon in such systems is the significant increase in electron readout contrast, measured via Elzerman-style readout to a single-electron transistor (SET) island, when the donor nuclei are initialized in a parallel spin orientation compared to an anti-parallel orientation. In this work, we present a detailed analysis of the exchange-coupled donor system in the parallel nuclear regime and propose a physical mechanism for this effect. We attribute the enhanced readout contrast to an additional electron tunneling event to the SET during a single read period, when the donor nuclei are aligned in a parallel spin configuration. , , # Data for: Electron readout contrast enhancement in the parallel nuclear regime of an exchange-coupled donor spin qubit system Dataset DOI: [10.5061/dryad.1c59zw4b2](https://doi.org/10.5061/dryad.1c59zw4b2) ## Description of the data and file structure This is accompanying data for the journal article - Electron readout contrast enhancement in the parallel nuclear regime of an exchange-coupled donor spin qubit system. ### Files and variables #### File: Parallel_nuclei_data.zip **Description:** This folder consists of 6 data folders and a Jupyter notebook .ipynb data analysis script. **Data folders:** The naming convention of the data folders 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 HH-MM-SS. Each data folder contains the following information: *..., ,