Report
Prediction and real-time compensation of qubit decoherence via machine-learning
| العنوان: | Prediction and real-time compensation of qubit decoherence via machine-learning |
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| المؤلفون: | Mavadia, Sandeep, Frey, Virginia, Sastrawan, Jarrah, Dona, Stephen, Biercuk, Michael J. |
| سنة النشر: | 2016 |
| المجموعة: | Condensed Matter Physics (Other) Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Atomic Physics |
| الوصف: | The wide-ranging adoption of quantum technologies requires practical, high-performance advances in our ability to maintain quantum coherence while facing the challenge of state collapse under measurement. Here we use techniques from control theory and machine learning to predict the future evolution of a qubit's state; we deploy this information to suppress stochastic, semiclassical decoherence, even when access to measurements is limited. First, we implement a time-division-multiplexed approach, interleaving measurement periods with periods of unsupervised but stabilised operation during which qubits are available, for e.g. quantum information experiments. Second, we employ predictive feedback during sequential but time delayed measurements to reduce the Dick effect as encountered in passive frequency standards. Both experiments demonstrate significant improvements in qubit phase stability over "traditional" measurement-based feedback approaches by exploiting time domain correlations in the noise processes. This technique requires no additional hardware and is applicable to all two-level quantum systems where projective measurements are possible. Comment: Additional results presented. Related work available from http://www.physics.usyd.edu.au/~mbiercuk/Publications.html |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1038/ncomms14106 |
| URL الوصول: | http://arxiv.org/abs/1604.03991 |
| رقم الانضمام: | edsarx.1604.03991 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1038/ncomms14106 |
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