2014/07/03 by Harley D. Scammell, H. D. Scammell, O. P. Sushkov · 1 voice · 1 citation
Physics and Astronomy · #Bose gas #Bose–Einstein condensate #Bose–Einstein statistics #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Condensation #Condensed matter physics #Half-integer #Integer (computer science) #Physics #Quantum many-body systems #Quantum mechanics #Quantum, superfluid, helium dynamics #Spin (aerodynamics) #Spin glass #Thermodynamics #cond-mat.other #hep-ph #nucl-th
paper · pdf · doi:10.1103/physrevlett.114.055702
arxiv created 2014/07/03 · arxiv published 2014/07/03 · arxiv updated 2014/07/03 · openalex publication_date 2015/02/04 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We consider the Bose condensation of bosonic particles with spin 1/2. The condensation is driven by an external magnetic field. Our work is motivated by ideas of quantum critical deconfinement and bosonic spinons in spin liquid states. We show that both the nature of the novel Bose condensate and the excitation spectrum are fundamentally different from that in the usual integer spin case. We predict two massive ("Higgs") excitations and two massless Goldstone excitations. One of the Goldstone excitations has a linear excitation spectrum and another has a quadratic spectrum. This implies that the Bose condensate does not support superfluidity, the Landau criterion is essentially violated. We formulate a "smoking gun" criterion for searches of the novel Bose condensation.