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[Fizinfo] MTA Wigner FK RMI Elméleti Osztály Szemináriuma

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  • From: Balog Janos <balog.janos AT>
  • To: fizinfo AT, rmkiusers AT
  • Subject: [Fizinfo] MTA Wigner FK RMI Elméleti Osztály Szemináriuma
  • Date: Mon, 22 Feb 2016 15:45:33 +0100
  • Authentication-results: (amavisd-new); dkim=pass (1024-bit key) reason="pass (just generated, assumed good)"

MTA Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk

Marton Lajer

"Truncated Hilbert Space Approach for the 1+1D phi^4 Theory"

címmel tartandó szemináriumára.


We used the massive analogue of the truncated conformal space approach to study the broken phase of the 1+1 dimensional scalar phi^4 model in finite volume, similarly to the work by S. Rychkov and L. Vitale. In our work, the finite size spectrum was determined numerically using an effective eigensolver routine, which was followed by a simple extrapolation in the cutoff energy. We analyzed both the periodic and antiperiodic sectors. The results were compared with semiclassical and Bethe-Yang results as well as perturbation theory. We obtained the coupling dependence of the infinite volume breather and kink masses for moderate couplings. The results fit well with semiclassics and perturbative estimations, and confirm the conjecture of Mussardo that at most two neutral excitations can exist in the spectrum. We believe that improving our method with the renormalization procedure of Rychkov et al. enables to measure further interesting quantities such as decay rates and the inelastic part of scattering matrices.

Helye: MTA Wigner FK RMI III.ép. Tanácsterem
Ideje: 2016. február 26. péntek du. 14:00 óra

Szívesen látunk minden érdeklődőt.

Balog János

  • [Fizinfo] MTA Wigner FK RMI Elméleti Osztály Szemináriuma, Balog Janos, 02/22/2016

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