Condensed Matter Theory

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Multi-particle bound state formation following a quantum quench to the one-dimensional Bose gas with attractive interactions

(2015)

Authors:

Lorenzo Piroli, Pasquale Calabrese, Fabian HL Essler
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Elliptic and Triangular Flow of Identified Particles from the AMPT Model at RHIC Energies

J.Phys.G 42 (2015) 11, 115101

Authors:

Xu Sun, Jianli Liu, Alexander Schmah, Shusu Shi, Jingbo Zhang, Hanzhi Jiang and Lei Huo

Abstract:

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Driven active and passive nematics

Molecular Physics Taylor & Francis 113:17-18 (2015) 2656-2665

Authors:

Sumesh P Thampi, Ramin Golestanian, Julia M Yeomans
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Taylor dispersion of colloidal particles in narrow channels

Molecular Physics Taylor & Francis 113:17-18 (2015) 2538-2545

Authors:

Jimaan Sané, Johan T Padding, Ard A Louis
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Dynamics of fractionalization in quantum spin liquids

Physical review B: Condensed matter and materials physics American Physical Society 92:11 (2015) ARTN 115127

Authors:

J Knolle, Dmitry Kovrizhin, John Chalker, R Moessner

Abstract:

We present the theory of dynamical spin response for the Kitaev honeycomb model, obtaining exact results for the structure factor (SF) in gapped and gapless, Abelian and non-Abelian quantum spin-liquid (QSL) phases. We also describe the advances in methodology necessary to compute these results. The structure factor shows signatures of spin fractionalization into emergent quasiparticles: Majorana fermions and fluxes of Z2 gauge field. In addition to a broad continuum from spin fractionalization, we find sharp (δ-function) features in the response. These arise in two distinct ways: from excited states containing only (static) fluxes and no (mobile) fermions, and from excited states in which fermions are bound to fluxes. The SF is markedly different in Abelian and non-Abelian QSLs, and bound fermion-flux composites appear only in the non-Abelian phase.
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