談話会・セミナー

第6回 物理工学科教室談話会(講師:Dr. Giuseppe Carleo)
2017.07.21

日時:平成29年7月27日(木) 14:30~15:30
場所:6号館3階セミナー室B(368)
講師: Dr. Giuseppe Carleo
所属:ETH Zurich
題目:Neural-network Quantum States
Abstract:
Machine-learning-based approaches are being increasingly adopted in a wide variety of domains, and very recently their effectiveness has been demonstrated also for many-body physics [1-4].
In this seminar I will present recent applications to quantum physics.

First, I will discuss how a systematic machine learning of the many-body wave-function can be realized.
This goal has been achieved in [1], introducing a variational representation of quantum states based on artificial neural networks.
In conjunction with Monte Carlo schemes, this representation can be used to study both ground-state and unitary dynamics, with controlled accuracy. Moreover, I will show how a similar representation can be used to perform efficient Quantum State Tomography on highly-entangled states [5], previously inaccessible to state-of-the art tomographic approaches.

I will then briefly discuss, recent developments in quantum information theory, concerning the high representational power of neural-network quantum states.

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[1] Carleo, and Troyer — Science 355, 602 (2017).
[2] Carrasquilla, and Melko — Nat. Physics doi:10.1038/nphys4035 (2017)
[3] Wang — Phys. Rev. B 94, 195105 (2016)
[4] van Nieuwenburg, Liu, and Huber — Nat. Physics doi:10.1038/nphys4037 (2017)
[5] Torlai, Mazzola, Carrasquilla, Troyer, Melko, and Carleo — arXiv:1703.05334 (2017)

紹介教員:今田正俊 教授、山地洋平 特任准教授(ともに物理工学専攻)

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