Fig. 5: Supersymmetric protection from thermal broadening.
From: Fingerprints of supersymmetric spin and charge dynamics observed by inelastic neutron scattering
Background-subtracted scattered intensities measured for BPCC at mz = 0.5 at low (a, f) and intermediate (b, g) temperatures, integrated over qh ∈ [ − 1.125, − 0.875] and shown for sectors q⊥ = π (a, b) and q⊥ = 0 (f, g). The error bars indicate one standard deviation. The l-MPS and c-MPS lines are as in Fig. 4. c, d, h, i Heights and widths of the t0 spectral peaks shown as functions of temperature and compared with c-MPS calculations. Without supersymmetry, increasing T causes a reduced intensity (c) and broader peak (d), whereas in the supersymmetric sector there is no thermal evolution within the experimental and numerical resolution. e, j Spectral functions of the pure and ladder-derived t-J chains computed at qh = 0 (i.e. with no momentum integration) in both parity (q⊥) sectors at T = 0 and for the three experimental temperatures.
