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Aging and non-equilibrium critical phenomena in Monte Carlo simulations of 3D pure and diluted Ising models

in** Progress of Theoretical and Experimental Physics**

May 2015; p ublished online May 2015 .

Journal Article. Subjects: Classical Mechanics; Computational Physics. 8524 words.

We investigate the non-equilibrium critical evolution of statistical systems and describe of its some features, such as aging and violation of the fluctuation-dissipation theorem. We...

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Anomalous Decay of Unstable State and Wave Propagation in the Friedrichs Model Consisting of a Discrete State and the Fibonacci Lattice

in** Progress of Theoretical Physics**

November 2009; p ublished online November 2009 .

Journal Article. Subjects: Condensed Matter Physics; Quantum Physics; Computational Physics. 0 words.

The decay of an unstable state in the weakly coupled Friedrichs model, consisting of a discrete state and the Fibonacci lattice, is investigated numerically. The survival probability is...

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Application of a neural network to the sign problem via the path optimization method

in** Progress of Theoretical and Experimental Physics**

P ublished online February 2018 .

Journal Article. Subjects: Computational Physics; Classical Mechanics; Particles and Fields. 4037 words.

**Abstract**

We introduce the feedforward neural network to attack the sign problem via the path optimization method. The variables of integration are complexified...

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Averaged Semiquantum Method Is a Useful Tool to Predict the Decoherence of Kicked Harmonic Oscillator System

in** Progress of Theoretical Physics**

February 2010; p ublished online February 2010 .

Journal Article. Subjects: Quantum Physics; Classical Mechanics; Computational Physics. 0 words.

We investigate the quantum-classical correspondence of kicked harmonic oscillator (KHO) model by the averaged semiquantum method. Furthermore, we investigate the decoherence of *N* dimensiona...

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Characterization of a thermal neutron beam monitor based on gas electron multiplier technology

in** Progress of Theoretical and Experimental Physics**

P ublished online August 2014 .

Journal Article. Subjects: Computational Physics; Physics. 5985 words.

Research into valid alternatives to [math]He detectors is fundamental to the affordability of new neutron spallation sources like the European Spallation Source (ESS). In the case of ESS it...

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Effect of quadrupole focusing-field fluctuation on the transverse stability of intense hadron beams in storage rings

in** Progress of Theoretical and Experimental Physics**

P ublished online February 2018 .

Journal Article. Subjects: Computational Physics. 6128 words.

**Abstract**

A systematic experimental study is performed to clarify the parameter dependence of the noise-induced beam instability previously demonstrated by a...

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Efficient Implementations of Molecular Dynamics Simulations for Lennard-Jones Systems

in** Progress of Theoretical Physics**

August 2011; p ublished online August 2011 .

Journal Article. Subjects: Computational Physics. 0 words.

Efficient implementations of the classical molecular dynamics (MD) method for Lennard-Jones particle systems are considered. Not only general algorithms but also techniques that are...

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Enhancement of muonium emission rate from silica aerogel with a laser-ablated surface

in** Progress of Theoretical and Experimental Physics**

P ublished online September 2014 .

Journal Article. Subjects: Computational Physics; Particles and Fields. 2820 words.

Emission of muonium ([math]) atoms from a laser-processed aerogel surface into vacuum was studied for the first time. Laser ablation was used to create hole-like regions with diameter of...

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Free-energy formula for emittance-growth estimation in intense mismatched beams

in** Progress of Theoretical and Experimental Physics**

September 2015; p ublished online September 2015 .

Journal Article. Subjects: Computational Physics. 4969 words.

We construct a theoretical model that allows a quick estimate of emittance growth in an intense charged-particle beam initially mismatched to an external linear focusing potential. The...

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Jost function method on a Lagrange mesh

in** Progress of Theoretical and Experimental Physics**

P ublished online December 2013 .

Journal Article. Subjects: Computational Physics. 5678 words.

In a new formalism of the Jost function method, the coupled first-order differential equations are solved on a Lagrange mesh. To this end, we modify the original definition of the expansion...