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[Fizinfo] BME Elm. Fiz. Szeminárium, márc. 28, Curt von Keyserlingk

From: Janos Asboth <asboth.janos AT ttk.bme.hu>
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Subject: [Fizinfo] BME Elm. Fiz. Szeminárium, márc. 28, Curt von Keyserlingk
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Meghívó

BME Elméleti Fizika Szeminárium,

márc. 28 péntek 10h15,
1111 Bp., Budafoki út 8., BME FIII. magasföldszint 1, szemináriumi szoba

Curt von Keyserlingk (King's College, London):
Logarithmic corrections to particle lifetimes in 1D lattice fermion systems
at finite temperature

A naive application of Fermi's Golden rule (FGR) suggests that weakly
interacting lattice fermions should have a lifetime ~ 1/Delta^2 in the
limit of small interaction strength Delta, and at finite temperature T>0.
Based on dissipation-assisted-operator-evolution (DAOE) numerical results,
and two rather different non-perturbative diagrammatic re-summations, we
predict that the quasiparticle lifetime is suppressed by an additional
logarithmic factor so that lifetime ~ 1/[(Delta^2 \log(1/|\Delta|)] in 1
spatial dimension.

Authors: Thomas Young, Jerome Lloyd, Curt von Keyserlingk
[This work is not yet published.]

Minden érdeklődőt szeretettel várunk.
Asbóth János,
szemináriumi koordinátor

[Fizinfo] BME Elm. Fiz. Szeminárium, márc. 28, Curt von Keyserlingk, Janos Asboth, 03/26/2025