43 research outputs found
Pathos and the Mundane in the Symbolic Space of 1956 Revolution: the Case of Corvin-passage, Budapest
The Corvin passage is one of the most important symbolic spaces of 1956 revolution in Hungary. The majority of armed conflicts took place in Budapest, where the largest resistance group had to battle against Soviet tanks in the neighbourhood of the Corvin Passage. This study aims to highlight the fact that, even though a general shift has taken place from the pre-1990 policy to ‘forget’ to today’s established remembrance practices, the Corvin Passage still does not have a prominent position as a major historic site. Our research is based on a study of relevant national and international literature, on an analysis of documents relating to tourism site management, on historical sources related to the Corvin Passage, and on a content analysis of guide-books and websites. The authors would tribute to 70 anniversary of treading out of Hungarian revolution and war of independence with this paper.
Renormalization group study of the two-dimensional random transverse-field Ising model
The infinite disorder fixed point of the random transverse-field Ising model
is expected to control the critical behavior of a large class of random quantum
and stochastic systems having an order parameter with discrete symmetry. Here
we study the model on the square lattice with a very efficient numerical
implementation of the strong disorder renormalization group method, which makes
us possible to treat finite samples of linear size up to . We have
calculated sample dependent pseudo-critical points and studied their
distribution, which is found to be characterized by the same shift and width
exponent: . For different types of disorder the infinite disorder
fixed point is shown to be characterized by the same set of critical exponents,
for which we have obtained improved estimates: and
. We have also studied the scaling behavior of the magnetization
in the vicinity of the critical point as well as dynamical scaling in the
ordered and disordered Griffiths phases
Griffiths-McCoy singularities in random quantum spin chains: Exact results
We consider random quantum (tight-binding, XX and Ising) spin chains in the
off-critical region and study their Griffiths-McCoy singularities. These are
obtained from the density of states of the low-energy excitations, which is
calculated exactly by the Dyson-Schmidt method. In large finite systems the
low-energy excitations are shown to follow the statistics of extremes and their
distribution is given by the Fr\'echet form. Relation between the Dyson-Schmidt
technique and the strong disorder renormalization group method is also
discussed.Comment: 7 pages, accepted for publication in Phys. Rev.