1,765 research outputs found
Anomalous diffusion analysis of the lifting events in the event-chain Monte Carlo for the classical XY models
We introduce a novel random walk model that emerges in the event-chain Monte
Carlo (ECMC) of spin systems. In the ECMC, the lifting variable specifying the
spin to be updated changes its value to one of its interacting neighbor spins.
This movement can be regarded as a random walk in a random environment with a
feedback. We investigate this random walk numerically in the case of the
classical XY model in 1,2, and 3 dimensions to find that it is superdiffusive
near the critical point of the underlying spin system. It is suggested that the
performance improvement of the ECMC is related to this anomalous behavior.Comment: 7 pages, 5 figures. (v2) Presentation including plots reorganized.
Discussion of exponents in the infinite system size limit adde
Enhanced coherent dynamics near a transition between neutral quantum-paraelectric and ionic ferroelectric phases in the quantum Blume-Emery-Griffiths model
Nonequilibrium dynamics are studied near the quantum phase transition point
in the one-dimensional quantum Blume-Emery-Griffiths model. Its pseudo-spin
component represents an electric polarization, and
corresponds to ionicity, in mixed-stack charge-transfer complexes that exhibit
a transition between neutral quantum-paraelectric and ionic ferroelectric (or
antiferroelectric) phases. The time-dependent Schr\"odinger equation is solved
for the exact many-body wave function in the quantum paraelectric phase. After
impact force is introduced on a polarization locally in space and time,
polarizations and ionicity coherently oscillate. The oscillation amplitudes are
large near the quantum phase transition point. The energy supplied by the
impact flows linearly into these oscillations, so that the nonequilibrium
behavior is uncooperative.Comment: 6 pages, 4 figures, accepted for publication in Phys. Rev.
Transnational Systems of Care and Women's Labour Migration: A study of Indonesian domestic workers to
Transnational Systems of Care and Women's Labour Migration: A study of Indonesian domestic workers to
Marketization of Care and Gendered Cross-Border Migration from Indonesia to Malaysia: The Case of Indonesian Female Migrant Domestic Workers in/to Malaysia.
Introduction
For the last two decades, the rights of domestic workers have drawn attention from
academia, policy makers, NGO workers and human rights activists. The International Labour
Organization (ILO) (2011) estimates that there are currently 53 to 100 million domestic workers
worldwide (around 83% of whom are women and girls), and many of them, especially the female
live-in migrant domestic workers (MDWs), are working under precarious conditions without any
labour rights. Since domestic work is undervalued and poorly regulated, domestic workers remain
overworked, underpaid and unprotected. Media reports have increasingly highlighted the plight of
MDWs in the different parts of world who suffer from maltreatment, such as control of mobility
through withholding identity papers, physical abuse, sexual harassment, overtime work and wage
denial. Yet, public authorities have been reluctant to intervene in the defense of domestic workers,
primarily because domestic work is regarded as a “private” issue within the family. Government
intervention mainly takes the form of banning the migration of women in low-skilled sectors
altogether or domestic workers specifically, rather than finding measures to protect the rights of
these migrant
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