Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nodal Liquids in Extended t-J Models and Dynamical Supersymmetry   In the context of extended t-J models, with intersite Coulomb interactions of
the form $-V\sum\limits_{< {i,j} >} {n_in_j}$, with n_i denoting the electron
number operator at site i, nodal liquids are discussed. We use the spin-charge
separation ansatz as applied to the nodes of a d-wave superconducting gap.Such
a situation may be of relevance to the physics of high-temperature
superconductivity. We point out the possibility of existence of certain points
in the parameter space of the model characterized by dynamical supersymmetries
between the spinon and holon degrees of freedom, which are quite different from
the symmetries in conventional supersymmetric t-J models. Such symmetries
pertain to the continuum effective field theory of the nodal liquid, and one's
hope is that the ancestor lattice model may differ from the continuum theory
only by renormalization-group irrelevant operators in the infrared. We give
plausible arguments that nodal liquids at such supersymmetric points are
characterized by superconductivity of Kosterlitz-Thouless type. The fact that
quantum fluctuations around such points can be studied in a controlled way,
probably makes such systems of special importance for an eventual
non-perturbative understanding of the complex phase diagram of the associated
high-temperature superconducting materials.

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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
31
The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: cs
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The categories of this paper are: hep-ph
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The categories of this paper are: math
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The categories of this paper are: astro-ph