One-dimensional quantum liquids: Beyond the Luttinger liquid paradigm
By A. Imambekov, T. Schmidt, L. Glazman. 2011
312 citations recorded by the source corpus.
For many years, the Luttinger liquid theory has served as a useful paradigm for the description of one-dimensional (1D) quantum fluids in the limit of low energies. This theory is based on a linearization of the dispersion relation of the particles constituting the fluid. We review the recent progress in understanding 1D quantum fluids beyond the low-energy limit, where the nonlinearity of the dispersion relation becomes essential. The novel methods which have been developed to tackle such systems combine phenomenology built on the ideas of the Fermi edge singularity and the Fermi liquid theory, perturbation theory in the interaction strength, and a new way of treating finite-size integrable models. These methods can be applied to a wide variety of 1D fluids, from 1D spin liquids to electrons in quantum wires to cold atoms confined to a 1D trap. We review existing results for various dynamic correlation functions, in particular the density structure factor and the spectral function. Moreover, we show how a dispersion nonlinearity leads to finite particle lifetimes, and discuss its impact on the transport properties of 1D systems at finite temperatures. The conventional Luttinger liquid theory is a special limit of the new theory, and we explain the relation between the two.
Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics
View Paper: https://www.semanticscholar.org/paper/ba1a725eb8c1766146df2717e30952ef45997f8f
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In Atomic and Molecular Physics, and Optics
In Condensed Matter Physics
Citations in the corpus
- A one-dimensional liquid of fermions with tunable spin (2014, background): “Although the Luttinger approach describes qualitatively the physics of a number of 1D systems [11, 12], the problem of how to extend it to a more detailed description of real systems has puzzled physicists over the years [7].”
- Universal few-body physics and cluster formation (2017, background): “gases (Bloch et al., 2008; Bongs and Sengstock, 2004; Cazalilla et al., 2011; Giamarchi, 2004; Imambekov et al., 2012; Kolomeisky and Straley, 1996; Lewenstein et al., 2012, 2007; Lieb et al., 2004; McKay and DeMarco, 2011) of bosonic or fermionic or mixed symmetry (Giorgini et al.”