'pub_abstract':'The Berezinskii-Kosterlitz-Thouless (BKT) transitions of the six-state clock\nmodel on the square lattice are investigated by means of the corner-transfer\nmatrix renormalization group method. The classical analogue of the entanglement\nentropy $S( L, T )$ is calculated for $L$ by $L$ square system up to $L = 129$,\nas a function of temperature $T$. The entropy has a peak at $T = T^{*}_{~}( L\n)$, where the temperature depends on both $L$ and boundary conditions. Applying\nthe finite-size scaling to $T^{*}_{~}( L )$ and assuming the presence of BKT\ntransitions, the transition temperature is estimated to be $T_1^{~} = 0.70$ and\n$T_2^{~} = 0.88$. The obtained results agree with previous analyses. It should\nbe noted that no thermodynamic function is used in this study.','author_list':['Roman Krčmár','Andrej Gendiar','Tomotoshi Nishino'],'arxiv_link':'http://arxiv.org/abs/1612.07611v1','pub_title':'Phase transition of the six-state clock model observed from the\n entanglement entropy'
}
self.assertEqual(caller.data,correct_data)
deftest_errorcode_no_version_nr(self):
# Should be already caught in form validation
caller=ArxivCaller(Submission,'1412.0006')
deftest_identifier_old_style(self):
caller=ArxivCaller('cond-mat/0612480')
self.assertTrue(caller.is_valid)
correct_data={
'pub_title':'Least Action Principle for the Real-Time Density Matrix Renormalization\n Group','arxiv_link':'http://arxiv.org/abs/cond-mat/0612480v2','author_list':['Kouji Ueda','Chenglong Jin','Naokazu Shibata','Yasuhiro Hieida','Tomotoshi Nishino'],'pub_abstract':'A kind of least action principle is introduced for the discrete time\nevolution of one-dimensional quantum lattice models. Based on this principle,\nwe obtain an optimal condition for the matrix product states on succeeding time\nslices generated by the real-time density matrix renormalization group method.\nThis optimization can also be applied to classical simulations of quantum\ncircuits. We discuss the time reversal symmetry in the fully optimized MPS.'
