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Published in 2022 at "Journal of High Energy Physics"
DOI: 10.1007/jhep03(2022)069
Abstract: Abstract We consider two nonlinear sigma models on de Sitter background which involve the same derivative interactions as quantum gravity but without the gauge issue. The first model contains only a single field, which can…
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Keywords:
sigma models;
nonlinear sigma;
inflationary logarithms;
summing inflationary ... See more keywords
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Published in 2017 at "Journal of High Energy Physics"
DOI: 10.1007/jhep08(2017)129
Abstract: A bstractOff-shell (4, 0) supermultiplets in 2-dimensions are formulated. These are used to construct sigma models whose target spaces are vector bundles over manifolds that are hyperkähler with torsion. The off-shell supersymmetry implies that the…
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Keywords:
models shell;
shell supersymmetry;
sigma models;
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Published in 2021 at "Journal of High Energy Physics"
DOI: 10.1007/jhep09(2021)037
Abstract: Abstract Recently, a variety of deformed T1,1 manifolds, with which 2D non-linear sigma models (NLSMs) are classically integrable, have been presented by Arutyunov, Bassi and Lacroix (ABL) [46]. We refer to the NLSMs with the…
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Keywords:
chern simons;
integrable deformed;
sigma;
model ... See more keywords
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Published in 2017 at "Journal of High Energy Physics"
DOI: 10.1007/jhep10(2017)024
Abstract: A bstractWe elaborate on the class of deformed T-dual (DTD) models obtained by first adding a topological term to the action of a supercoset sigma model and then performing (non-abelian) T-duality on a subalgebra g˜$$…
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Keywords:
duality;
non abelian;
abelian duality;
tilde mathfrak ... See more keywords
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Published in 2019 at "Communications in Mathematical Physics"
DOI: 10.1007/s00220-019-03591-5
Abstract: We describe a covariant framework to construct a globalized version for the perturbative quantization of nonlinear split AKSZ Sigma Models on manifolds with and without boundary, and show that it captures the change of the…
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Keywords:
nonlinear split;
split aksz;
perturbative quantization;
quantization nonlinear ... See more keywords
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Published in 2019 at "Journal of Physics A: Mathematical and Theoretical"
DOI: 10.1088/1751-8121/ab0b79
Abstract: Motivated by the search for new integrable string models, we study the properties of massless tree-level S-matrices for 2d sigma models expanded near the trivial vacuum. We find that, in contrast to the standard massive…
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Keywords:
tree level;
level;
massless tree;
model ... See more keywords
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Published in 2021 at "Physical Review B"
DOI: 10.1103/physrevb.103.144436
Abstract: Instanton processes are present in a variety of quantum field theories relevant to high energy as well as condensed matter physics. While they have led to important theoretical insights and physical applications, their underlying features…
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Keywords:
sigma models;
lattice systems;
instantons nonlinear;
exploring instantons ... See more keywords
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Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.102.065018
Abstract: There exists a certain argument that in even dimensions, scale invariant quantum field theories are conformal invariant. We may try to extend the argument in $2n + \epsilon$ dimensions, but the naive extension has a…
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Keywords:
invariance;
conformal invariance;
sigma models;
invariance scale ... See more keywords
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Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.107.085015
Abstract: We consider quantum aspects of a class of generalized Gross-Neveu models, which in special cases reduce to sigma models. We show that, in the case of gauged models, an admissible gauge is $A_\mu=0$, which is…
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Keywords:
integrable sigma;
sigma models;
geometry;
riemann surfaces ... See more keywords
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Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.96.045010
Abstract: We canonically quantize $O(D+2)$ nonlinear sigma models (NLSMs) with theta term on arbitrary smooth, closed, connected, oriented $D$-dimensional spatial manifolds $\mathcal{M}$, with the goal of proving the suitability of these models for describing symmetry-protected topological…
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Keywords:
ground;
term;
symmetry protected;
theta term ... See more keywords
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Published in 2020 at "Journal of Experimental and Theoretical Physics"
DOI: 10.1134/s1063776121040129
Abstract: Abstract We study two dimensional path integral Lefschetz thimbles, i.e. the possible path integration contours. Specifically, in the examples of the O ( N ) and $$\mathbb{C}{{\mathbb{P}}^{{N - 1}}}$$ models, we find a large class…
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Keywords:
towards lefschetz;
sigma models;
lefschetz thimbles;
thimbles sigma ... See more keywords