2007/06/30 by D. M. Silevitch, C. M. S. Gannarelli, A. J. Fisher +2
Chemistry · Physics and Astronomy · #Computer science #Condensed matter physics #Ising model #Ising spin #Molecular spectroscopy and chirality #Physics #Projection (relational algebra) #Quantum #Quantum many-body systems #Quantum mechanics #Spin (aerodynamics) #Statistical physics #Theoretical and Computational Physics #Thermodynamics #cond-mat.dis-nn #cond-mat.other
paper · pdf · doi:10.1103/physrevlett.99.057203
published as Phys. Rev. Lett 99 057203 (2007) · 5 pages, 4 figures
openalex publication_date 2007/07/30 · arxiv created 2007/08/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
A transverse magnetic field is used to scan the diagonal and off-diagonal susceptibility of the uniaxial quantum magnet, LiHo(0.045) Y(0.955)F(4). Clusters of strongly coupled spins act as the primary source for the response functions, which result from a field-induced quantum projection of the system into a classically forbidden (meaning non-Ising) regime. Calculations based on spin pairs reproduce only some features of the data and fail to predict the measured off-diagonal response, providing evidence of a multispin collective state.