Details

Autor(en) / Beteiligte

• Marcuzzi, M.
• Marino, J.
• Gambassi, A.
• Silva, A.

Titel

Prethermalization from a low-density Holstein-Primakoff expansion

Ist Teil von

• Physical review. B, 2016-12, Vol.94 (21), Article 214304

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2016

Quelle

American Physical Society

Beschreibungen/Notizen

• We consider the nonequilibrium dynamics arising after a quench of the transverse magnetic field of a quantum Ising chain, together with the sudden switch-on of a long-range interaction term. The dynamics after the quantum quench is mapped onto a fully connected model of hard-core bosons, after a suitable combination of a Holstein-Primakoff transformation and of a low-density expansion in the quasiparticles injected by the quench. This mapping holds for a broad class of initial states and for quenches which do not cross the critical point of the transverse field Ising model. We then study the algebraic relaxation in time of a number of observables towards a metastable, prethermal state, which becomes the asymptotic steady state in the thermodynamic limit.