Fermionic quasiparticle representation of Tomonaga-Luttinger Hamiltonian
Fermionic quasiparticle representation of Tomonaga-Luttinger Hamiltonian
复制标题
Tomonaga-Luttinger 哈密顿量的费米子准粒子表示
DOI:
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发表时间:
2004
期刊:
影响因子:
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通讯作者:
A. Rozhkov
中科院分区:
文献类型:
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作者:
A. Rozhkov
Abstract.
We find a unitary operator which asymptotically diagonalizes the
Tomonaga-Luttinger Hamiltonian of one-dimensional spinless electrons. The
operator performs a Bogoliubov
rotation in the space of electron-hole pairs. If bare interaction of the
physical electrons is sufficiently small this transformation
maps the original Tomonaga-Luttinger system on a system of free fermionic
quasiparticles. Our representation is useful when the electron dispersion
deviates from linear form. For such situation we obtain non-perturbative
results for the electron gas free energy and the density-density
propagator.