نتایج جستجو برای: NQS

تعداد نتایج: 73  

2018

Correlator product states (CPS) are a powerful and very broad class of states for quantum lattice systems whose (unnormalised) amplitudes in a fixed basis can be sampled exactly and efficiently. They work by gluing together states of overlapping clusters of sites on the lattice, called correlators. Recently Carleo and Troyer (2017 Science 355 602) introduced a new type sampleable ansatz called ...

2018

Correlator product states (CPS) are a powerful and very broad class of states for quantum lattice systems whose (unnormalised) amplitudes in a fixed basis can be sampled exactly and efficiently. They work by gluing together states of overlapping clusters of sites on the lattice, called correlators. Recently Carleo and Troyer (2017 Science 355 602) introduced a new type sampleable ansatz called ...

Journal: :Journal of Physics A 2021

Neural-network quantum states (NQS) have become a powerful tool in many-body physics. Of the numerous possible architectures which neural-networks can encode amplitudes of simplicity Restricted Boltzmann Machine (RBM) has proven especially useful for both numerical and analytical studies. In particular devising exact NQS representations important classes states, like Jastrow stabilizer provided...

2016
Xiaocheng Zhu Dominik Skoneczny Jeffrey D. Weidenhamer James M. Mwendwa Paul A. Weston Geoff M. Gurr Ragan M. Callaway Leslie A. Weston

Bioactive plant secondary products are frequently the drivers of complex rhizosphere interactions, including those with other plants, herbivores and microbiota. These chemically diverse molecules typically accumulate in a highly regulated manner in specialized plant tissues and organelles. We studied the production and localization of bioactive naphthoquinones (NQs) in the roots of Echium plant...

Journal: :npj Quantum Information 2021

Abstract Neural-network quantum state (NQS) has attracted significant interests as a powerful wave-function ansatz to model phenomena. In particular, variant of NQS based on the restricted Boltzmann machine (RBM) been adapted ground spin lattices and electronic structures small molecules in devices. Despite these progresses, challenges remain with RBM-NQS-based simulations. this work, we presen...

2016
Mohnish Dubey Sourish Dasgupta Ankit Sharma Konrad Höffner Jens Lehmann

Natural Language Query Formalization involves semantically parsing queries in natural language and translating them into their corresponding formal representations. It is a key component for developing question-answering (QA) systems on RDF data. The chosen formal representation language in this case is often SPARQL. In this paper, we propose a framework, called AskNow, where users can pose que...

2008
Robert Bartnik

We study the residual gauge freedom within the null quasi-spherical (NQS) gauge for spacetimes admitting an expanding shear-free null foliation. By constructing the most general NQS coordinates subordinate to such a foliation, we obtain both a clear picture of the geometric nature of the residual coordinate freedom, and an explicit construction of nontrivial NQS metrics representing some well-k...

1997
Robert Bartnik

Properties of the Einstein equations in a coordinate gauge based on expanding null hypersurfaces foliated by metric 2-spheres are described. This null quasi-spherical (NQS) gauge leads to particularly simple analyses of the characteristic structure of the equations and of the propagation of gravitational shocks, and clarifies the geometry of timelike boundary condition. A feature of the NQS gau...

1996
Robert Bartnik

Properties of the Einstein equations in a coordinate gauge based on expanding null hypersurfaces foliated by metric 2-spheres are described. This null quasi-spherical (NQS) gauge leads to particularly simple analyses of the characteristic structure of the equations and of the propagation of gravitational shocks, and clarifies the geometry of timelike boundary condition. A feature of the NQS gau...

2008
Robert Bartnik

Properties of the Einstein equations in a coordinate gauge based on expanding null hypersurfaces foliated by metric 2-spheres are described. This null quasi-spherical (NQS) gauge leads to particularly simple analyses of the characteristic structure of the equations and of the propagation of gravitational shocks, and clarifies the geometry of timelike boundary condition. A feature of the NQS gau...

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