Machine learning unveils multiple Pauli blockades in the transport spectroscopy of bilayer graphene double-quantum dots

• URL: http://arxiv.org/abs/2308.04937v1
• Date: Wed, 9 Aug 2023 13:12:02 GMT
• Title: Machine learning unveils multiple Pauli blockades in the transport spectroscopy of bilayer graphene double-quantum dots
• Authors: Anuranan Das, Adil Khan, Ankan Mukherjee and Bhaskaran Muralidharan
• Abstract summary: Pauli blockades in double quantum dot structures form an important basis for multi-qubit manipulation. We build theoretical models to capture the interplay between externally fed gate voltages and the physical properties of the 2-D system. We develop an automated method for real-time detection of multiple Pauli blockade regimes.
• Score: 2.294014185517203
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Recent breakthroughs in the transport spectroscopy of 2-D material quantum-dot platforms have engendered a fervent interest in spin-valley qubits. In this context, Pauli blockades in double quantum dot structures form an important basis for multi-qubit initialization and manipulation. Focusing on double quantum dot structures, and the experimental results, we first build theoretical models to capture the intricate interplay between externally fed gate voltages and the physical properties of the 2-D system in such an architecture, allowing us to effectively simulate Pauli blockades. Employing the master equations for transport and considering extrinsic factors such as electron-photon interactions, we thoroughly investigate all potential occurrences of Pauli blockades. Notably, our research reveals two remarkable phenomena: (i) the existence of multiple resonances within a bias triangle, and (ii) the occurrence of multiple Pauli blockades. Leveraging our model to train a machine learning algorithm, we successfully develop an automated method for real-time detection of multiple Pauli blockade regimes. Through numerical predictions and validations against test data, we identify where and how many Pauli blockades are likely to occur. We propose that our model can effectively detect the generic class of Pauli blockades in practical experimental setups and hence serves as the foundation for future experiments on qubits that utilize 2-D material platforms.

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