136 citations · 1.1k across the 28 of their papers we have counts for
29 papers
Heterotic String Sigma Models: Discrete Light Cone Quantization and Its Current-Current Deformation
Eric A. Bergshoeff, Kevin T. Grosvenor, Luca Romano +1
We propose a two-dimensional superstring sigma model that defines a self-contained corner of heterotic string theory, whose second quantization is heterotic matrix string theory. T…
A New Extrapolation Economy Cascadic Multigrid Method for Image Restoration Problems
Zhaoteng Chu, Ziqi Yan, Chenliang Li
In this paper, a new extrapolation economy cascadic multigrid method is proposed to solve the image restoration model. The new method combines the new extrapolation formula and qua…
Anisotropic Compactification of Nonrelativistic M-Theory
Stephen Ebert, Ziqi Yan
We study a decoupling limit of M-theory where the three-form gauge potential becomes critical. This limit leads to nonrelativistic M-theory coupled to a non-Lorentzian spacetime ge…
Non-Lorentzian IIB Supergravity from a Polynomial Realization of SL(2,R)
Eric Bergshoeff, Kevin T. Grosvenor, Johannes Lahnsteiner +2
We derive the action and symmetries of the bosonic sector of non-Lorentzian IIB supergravity by taking the non-relativistic string limit. We find that the bosonic field content is…
Renormalization of Supersymmetric Lifshitz Sigma Models
Ziqi Yan
We study the renormalization of an N = 1 supersymmetric Lifshitz sigma model in three dimensions. The sigma model exhibits worldvolume anisotropy in space and time around the high-…
Branched SL(2,Z) Duality
Eric Bergshoeff, Kevin T. Grosvenor, Johannes Lahnsteiner +2
We investigate how SL(2,Z) duality is realized in nonrelativistic type IIB superstring theory, which is a self-contained corner of relativistic string theory. Within this corner, w…
Aspects of Nonrelativistic Strings
Gerben Oling, Ziqi Yan
We review recent developments on nonrelativistic string theory. In flat spacetime, the theory is defined by a two-dimensional relativistic quantum field theory with nonrelativistic…
Dual D-Brane Actions in Nonrelativistic String Theory
Stephen Ebert, Hao-Yu Sun, Ziqi Yan
We study worldvolume actions for D-branes coupled to the worldvolume U(1) gauge field and Ramond-Ramond (RR) potentials in nonrelativistic string theory. This theory is a self-cont…
KLT Factorization of Nonrelativistic String Amplitudes
Ziqi Yan, Matthew Yu
We continue our study of the Kawai-Lewellen-Tye (KLT) factorization of winding string amplitudes. In a toroidal compactification, amplitudes for winding closed string states factor…
Zero Magnetic Field Plateau Phase Transition in Higher Chern Number Quantum Anomalous Hall Insulators
Yi-Fan Zhao, Ruoxi Zhang, Ling-Jie Zhou +5
The plateau-to-plateau transition in quantum Hall effect under high magnetic fields is a celebrated quantum phase transition between two topological states through either sweeping…
Torsional Deformation of Nonrelativistic String Theory
Ziqi Yan
Nonrelativistic string theory is a self-contained corner of string theory, with its string spectrum enjoying a Galilean-invariant dispersion relation. This theory is unitary and ul…
Strings in Bimetric Spacetimes
Ziqi Yan
We put forward a two-dimensional nonlinear sigma model that couples (bosonic) matter fields to topological Horava gravity on a nonrelativistic worldsheet. In the target space, this…
KLT Factorization of Winding String Amplitudes
Jaume Gomis, Ziqi Yan, Matthew Yu
We uncover a Kawai-Lewellen-Tye (KLT)-type factorization of closed string amplitudes into open string amplitudes for closed string states carrying winding and momentum in toroidal…
New Heat Kernel Method in Lifshitz Theories
Kevin T. Grosvenor, Charles Melby-Thompson, Ziqi Yan
We develop a new heat kernel method that is suited for a systematic study of the renormalization group flow in Horava gravity (and in Lifshitz field theories in general). This meth…
T-Duality in Nonrelativistic Open String Theory
Jaume Gomis, Ziqi Yan, Matthew Yu
Nonrelativistic open string theory is defined by a worldsheet theory that produces a Galilean invariant string spectrum and is described at low energies by a nonrelativistic Yang-M…
Renormalization of Galilean Electrodynamics
Shira Chapman, Lorenzo Di Pietro, Kevin T. Grosvenor +1
We study the quantum properties of a Galilean-invariant abelian gauge theory coupled to a Schrödinger scalar in 2+1 dimensions. At the classical level, the theory with minimal coup…
Nonrelativistic Open String and Yang-Mills Theory
Jaume Gomis, Ziqi Yan, Matthew Yu
The classical and quantum worldsheet theory describing nonrelativistic open string theory in an arbitrary nonrelativistic open and closed string background is constructed. We show…
Background Field Method for Nonlinear Sigma Models in Nonrelativistic String Theory
Ziqi Yan, Matthew Yu
We continue the study of nonrelativistic string theory in background fields. Nonrelativistic string theory is described by a nonlinear sigma model that maps a relativistic worldshe…
String Theory and String Newton-Cartan Geometry
Eric Bergshoeff, Jaume Gomis, Jan Rosseel +2
Nonrelativistic string theory is described by a sigma model with a relativistic worldsheet and a nonrelativistic target spacetime geometry, that is called string Newton-Cartan geom…
Nonrelativistic String Theory in Background Fields
Jaume Gomis, Jihwan Oh, Ziqi Yan
Nonrelativistic string theory is a unitary, ultraviolet finite quantum gravity theory with a nonrelativistic string spectrum. The vertex operators of the worldsheet theory determin…
An Action for Extended String Newton-Cartan Gravity
Eric Bergshoeff, Kevin Grosvenor, Ceyda Simsek +1
We construct an action for four-dimensional extended string Newton-Cartan gravity which is an extension of the string Newton-Cartan gravity that underlies nonrelativistic string th…
Strings with Non-Relativistic Conformal Symmetry and Limits of the AdS/CFT Correspondence
Troels Harmark, Jelle Hartong, Lorenzo Menculini +2
We find a Polyakov-type action for strings moving in a torsional Newton-Cartan geometry. This is obtained by starting with the relativistic Polyakov action and fixing the momentum…
Nonrelativistic String Theory and T-Duality
Eric Bergshoeff, Jaume Gomis, Ziqi Yan
Nonrelativistic string theory in flat spacetime is described by a two-dimensional quantum field theory with a nonrelativistic global symmetry acting on the worldsheet fields. Nonre…
Nonrelativistic Yang-Mills Theory for a Naturally Light Higgs Boson
Laure Berthier, Kevin T. Grosvenor, Ziqi Yan
We continue the study of the nonrelativistic short-distance completions of a naturally light Higgs, focusing on the interplay between the gauge symmetries and the polynomial shift…