Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quasiparticles and Phase Fluctuations in High Tc Superconductors   We argue based on theoretical considerations and analysis of experimental
data that quasiparticle excitations near the nodes determine the low
temperature properties in the superconducting state of cuprates. Quantum
effects of phase fluctuations are shown to be quantitatively important, but
thermal effects are small for $T \ll T_c$. An anisotropic superfluid Fermi
liquid phenomenology is presented for the effect of quasiparticle interactions
on the temperature and doping dependence of the low $T$ penetration depth.

12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
19
The categories of this paper are: eess
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph