TY - JOUR

T1 - Sandpile Solitons via Smoothing of Superharmonic Functions

AU - Kalinin, Nikita

AU - Shkolnikov, Mikhail

N1 - Publisher Copyright:
© 2020, Springer-Verlag GmbH Germany, part of Springer Nature.

PY - 2020/9/1

Y1 - 2020/9/1

N2 - Let F: Z2→ Z be the pointwise minimum of several linear functions. The theory of smoothing allows us to prove that under certain conditions there exists the pointwise minimal function among all integer-valued superharmonic functions coinciding with F “at infinity”. We develop such a theory to prove existence of so-called solitons (or strings) in a sandpile model, studied by S. Caracciolo, G. Paoletti, and A. Sportiello. Thus we made a step towards understanding the phenomena of the identity in the sandpile group for planar domains where solitons appear according to experiments. We prove that sandpile states, defined using our smoothing procedure, move changeless when we apply the wave operator (that is why we call them solitons), and can interact, forming triads and nodes.

AB - Let F: Z2→ Z be the pointwise minimum of several linear functions. The theory of smoothing allows us to prove that under certain conditions there exists the pointwise minimal function among all integer-valued superharmonic functions coinciding with F “at infinity”. We develop such a theory to prove existence of so-called solitons (or strings) in a sandpile model, studied by S. Caracciolo, G. Paoletti, and A. Sportiello. Thus we made a step towards understanding the phenomena of the identity in the sandpile group for planar domains where solitons appear according to experiments. We prove that sandpile states, defined using our smoothing procedure, move changeless when we apply the wave operator (that is why we call them solitons), and can interact, forming triads and nodes.

UR - http://www.scopus.com/inward/record.url?scp=85089480499&partnerID=8YFLogxK

U2 - 10.1007/s00220-020-03828-8

DO - 10.1007/s00220-020-03828-8

M3 - 文章

AN - SCOPUS:85089480499

SN - 0010-3616

VL - 378

SP - 1649

EP - 1675

JO - Communications in Mathematical Physics

JF - Communications in Mathematical Physics

IS - 3

ER -