Výsledky vyhledávání - "Reeves, Cian C."

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Predicting nonequilibrium Green's function dynamics and photoemission spectra via nonlinear integral operator learning

Autor: Zhu, Yuanran, Yin, Jia, Reeves, Cian C., Yang, Chao, Vlcek, Vojtech

Understanding the dynamics of nonequilibrium quantum many-body systems is an important research topic in a wide range of fields across condensed matter physics, quantum optics, and high-energy physics. However, numerical studies of large-scale nonequ

Externí odkaz: http://arxiv.org/abs/2407.09773

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Performance of wave function and Green's functions based methods for non equilibrium many-body dynamics

Autor: Reeves, Cian C., Harsha, Gaurav, Shee, Avijit, Zhu, Yuanran, Yang, Chao, Whaley, K Birgitta, Zgid, Dominika, Vlcek, Vojtech

Theoretical descriptions of non equilibrium dynamics of quantum many-body systems essentially employ either (i) explicit treatments, relying on truncation of the expansion of the many-body wave function, (ii) compressed representations of the many-bo

Externí odkaz: http://arxiv.org/abs/2405.08814

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Spontaneous localization at a potential saddle point from edge state reconstruction in a quantum Hall point contact

Autor: Cohen, Liam A., Samuelson, Noah L., Wang, Taige, Klocke, Kai, Reeves, Cian C., Taniguchi, Takashi, Watanabe, Kenji, Vijay, Sagar, Zaletel, Michael P., Young, Andrea F.

Quantum point contacts (QPCs) are an essential component in mesoscopic devices. Here, we study the transmission of quantum Hall edge modes through a gate-defined QPC in monolayer graphene. We observe resonant tunneling peaks and a nonlinear conductan

Externí odkaz: http://arxiv.org/abs/2401.10433

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Learning nonlinear integral operators via Recurrent Neural Networks and its application in solving Integro-Differential Equations

Autor: Bassi, Hardeep, Zhu, Yuanran, Liang, Senwei, Yin, Jia, Reeves, Cian C., Vlcek, Vojtech, Yang, Chao

In this paper, we propose using LSTM-RNNs (Long Short-Term Memory-Recurrent Neural Networks) to learn and represent nonlinear integral operators that appear in nonlinear integro-differential equations (IDEs). The LSTM-RNN representation of the nonlin

Externí odkaz: http://arxiv.org/abs/2310.09434

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On the unimportance of memory for the time non-local components of the Kadanoff-Baym equations

Autor: Reeves, Cian C., Zhu, Yuanran, Yang, Chao, Vlcek, Vojtech

The generalized Kadanoff-Baym ansatz (GKBA) is an approximation to the Kadanoff-Baym equations (KBE), that neglects certain memory effects that contribute to the Green's function at non-equal times. Here we present arguments and numerical results to

Externí odkaz: http://arxiv.org/abs/2306.06225

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Dynamic Mode Decomposition for Extrapolating Non-equilibrium Green's Functions Dynamics

Autor: Reeves, Cian C., Yin, Jia, Zhu, Yuanran, Ibrahim, Khaled Z., Yang, Chao, Vlcek, Vojtech

The HF-GKBA offers an approximate numerical procedure for propagating the two-time non-equilibrium Green's function(NEGF). Here we compare the HF-GKBA to exact results for a variety of systems with long and short-range interactions, different two-bod

Externí odkaz: http://arxiv.org/abs/2211.05868

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Nanoscale electrostatic control in ultra clean van der Waals heterostructures by local anodic oxidation of graphite gates

Autor: Cohen, Liam A., Samuelson, Noah L., Wang, Taige, Klocke, Kai, Reeves, Cian C., Taniguchi, Takashi, Watanabe, Kenji, Vijay, Sagar, Zaletel, Michael P., Young, Andrea F.

In an all-van der Waals heterostructure, the active layer, gate dielectrics and gate electrodes are assembled from two-dimensional crystals that have a low density of atomic defects. This design allows two-dimensional electron systems with very low d

Externí odkaz: http://arxiv.org/abs/2204.10296

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