Spectral Functions for the Tomonaga-Luttinger and Luther-Emery Liquids

We calculate the finite temperature single hole spectral function and the spin dynamic structure factor of spinfull one-dimensional Tomonaga-Luttinger liquid. Analytical expressions are obtained for a number of special cases. We also calculate the single hole spectral function of a spin gapped Luther-Emery liquid and obtain exact results at the free fermion point K_s=1/2. These results may be applied to the analysis of angle resolved photoemission and neutron scattering experiments on quasi-one-dimensional materials.Comment: Published versio

Synagogue paintings as indicating a!developing conception of national redemption

Abstract. Orgad Zvi, Synagogue paintings as indicating a developing conception of national redemption. “Images” vol. XXV, no. 34. Poznań 2019. Adam Mickiewicz University Press. Pp. 15–27. ISSN 1731-450X. DOI 10.14746/i.2019.34.01. This article compares the interior paintings in the ‘Ades and Ohel Moshe synagogues, both of which are non-Ashkenazi, in the Naḥlaot neighborhood in Jerusalem. Although the synagogues were decorated 50 years apart, there are similarities in the painted motifs and drawing schemes, but also some differences. I suggest that these differences reflect the development of a Jewish concept of national redemption during the 50 years that elapsed between the adornment of the two synagogues.Abstract. Orgad Zvi, Synagogue paintings as indicating a developing conception of national redemption. “Images” vol. XXV, no. 34. Poznań 2019. Adam Mickiewicz University Press. Pp. 15–27. ISSN 1731-450X. DOI 10.14746/i.2019.34.01. This article compares the interior paintings in the ‘Ades and Ohel Moshe synagogues, both of which are non-Ashkenazi, in the Naḥlaot neighborhood in Jerusalem. Although the synagogues were decorated 50 years apart, there are similarities in the painted motifs and drawing schemes, but also some differences. I suggest that these differences reflect the development of a Jewish concept of national redemption during the 50 years that elapsed between the adornment of the two synagogues

Correlated tunneling and the instability of the fractional quantum Hall edge

We consider a class of interaction terms that describes correlated tunneling of composite fermions between effective Landau levels. Despite being generic and of similar strength to that of the usual density-density couplings, these terms are not included in the accepted theory of the edges of fractional quantum Hall systems. Here we show that they may lead to an instability of the edge towards a new reconstructed state with additional channels, and thereby demonstrate the incompleteness of the traditional edge theory.Comment: Published versio

Nodal-antinodal dichotomy and magic doping fractions in a stripe ordered antiferromagnet

We study a model of a stripe ordered doped antiferromagnet consisting of coupled Hubbard ladders which can be tuned from quasi-one-dimensional to two-dimensional. We solve for the magnetization and charge density on the ladders by Hartree-Fock theory and find a set of solutions with lightly doped ``spin-stripes'' which are antiferromagnetic and more heavily doped anti-phase ``charge-stripes''. Both the spin- and charge-stripes have electronic spectral weight near the Fermi energy but in different regions of the Brillouin zone; the spin-stripes in the ``nodal'' region, near (\pi/2,\pi/2), and the charge-stripes in the ``antinodal'' region, near (\pi,0). We find a striking dichotomy between nodal and antinodal states in which the nodal states are essentially delocalized and two-dimensional whereas the antinodal states are quasi-one-dimensional, localized on individual charge-stripes. For bond-centered stripes we also find an even-odd effect of the charge periodicity which could explain the non-monotonous variations with doping of the low-temperature resistivity in LSCOComment: 6 pages, 6 figures, Expanded and improved, with additional reference

Why don’t people act when they know about suffering? (guest-blog)

Thanks to modern media everyone in Britain knows that there are people suffering from famine, war and deprivation around the world. From Haiti to Australia they are shown the suffering – so why don’t they do anything

Book review: mothering through precarity: women’s work and digital media

Julie A. Wilson and Emily Chivers Yochim. Mothering through Precarity: Women’s work and Digital Media. Duke University Press: London and Durham, 2017, 216 pp