Spin-charge separation in two-component Bose-gases

Abstract

We show that one of the key characteristics of interacting one-dimensional electronic quantum systems, the separation of spin and charge, can be observed in a two-component system of bosonic ultracold atoms even close to a competing phase separation regime. To this purpose we determine the real-time evolution of a single particle excitation and the single-particle spectral function using density-matrix renormalization group techniques. Due to efficient bosonic cooling and good tunability this setup exhibits very good conditions for observing this strong correlation effect. In anticipation of experimental realizations we calculate the velocities for spin and charge perturbations for a wide range of parameters.

References in corpus (7)

• Real time evolution using the density matrix renormalization group
• Spin-charge separation and localization in one-dimension
• Instabilities in binary mixtures of one-dimensional quantum degenerate gases
• Spin-charge separation in cold Fermi-gases: a real time analysis
• Spin waves in a one-dimensional spinor Bose gas
• Charge and spin dynamics of interacting Fermions in a one dimensional harmonic trap
• Fourier transform of the $2k_F$ Luttinger liquid density correlation function with different spin and charge velocities

Cited by in corpus (3)

• Composite fermionization of 1-D Bose-Bose mixtures
• Andreev-like reflections with cold atoms
• The low-energy excitation spectrum of one-dimensional dipolar quantum gases