Publications (51)
Closed strings from decaying D-branes
Neil Lambert, Hong Liu, Juan Maldacena
We compute the emission of closed string radiation from homogeneous rolling tachyons. For an unstable decaying D-brane the radiated energy is infinite to leading order for $p\le…
M2-Branes and Background Fields
Neil Lambert, Paul Richmond
We discuss the coupling of multiple M2-branes to the background 3-form and 6-form gauge fields of eleven-dimensional supergravity, including the coupling of the Fermions. In partic…
Quantising Chiral Bosons On Riemann Surfaces
Chris Hull, Neil Lambert
Sen's action in two dimensions governs a chiral boson coupled to a two-dimensional metric together with a second chiral boson that couples to a flat two-dimensional metric. This se…
Enhanced Coset Symmetries and Higher Derivative Corrections
Neil Lambert, Peter West
After dimensional reduction to three dimensions, the lowest order effective actions for pure gravity, M-theory and the Bosonic string admit an enhanced symmetry group. In this pape…
Relating U(N)xU(N) to SU(N)xSU(N) Chern-Simons Membrane theories
Neil Lambert, Constantinos Papageorgakis
By integrating out the U(1)_B gauge field, we show that the U(n)xU(n) ABJM theory at level k is equivalent to a Z_k identification of the (SU(n)xSU(n))/Z_n Chern-Simons theory, but…
Charged Chiral Fermions from M5-Branes
Neil Lambert, Miles Owen
We study M5-branes wrapped on a multi-centred Taub-NUT space. Reducing to String Theory on the circle fibration leads to D4-branes intersecting with D6-branes. D-braneology shows t…
Gauge Symmetry and Supersymmetry of Multiple M2-Branes
Jonathan Bagger, Neil Lambert
In previous work we proposed a field theory model for multiple M2-branes based on an algebra with a totally antisymmetric triple product. In this paper we gauge a symmetry that ari…
Alpha- and Omega-Deformations from fluxes in M-Theory
Neil Lambert, Domenico Orlando, Susanne Reffert
We discuss an SL(2,R) family of deformed N=2 four-dimensional gauge theories which we derive from a flux background in M-theory. In addition to the Omega-deformation this family in…
(2,0) Supersymmetry and the Light-Cone Description of M5-branes
Neil Lambert, Paul Richmond
In 1007.2982 a novel system of equations which propagate in one null and four space directions were obtained as the on-shell conditions for the six-dimensional (2,0) superalgebra.…
Flux and Freund-Rubin Superpotentials in M-theory
Neil Lambert
We discuss the effective action for weak G_2 compactifications of M-theory. The presence of fluxes acts as a source for the the axions and drives the Freund-Rubin parameter to zero…
Non-Relativistic M2-Branes and the AdS/CFT Correspondence
Neil Lambert, Joseph Smith
A non-relativistic limit of the AdS/CFT correspondence is studied in the context of M2-branes. On the field theory side this corresponds to a near-BPS limit of ABJM that localises…
Non-Lorentzian M5-brane Theories from Holography
Neil Lambert, Arthur Lipstein, Paul Richmond
M-theory on admits a description where the factor is constructed as a timelike Hopf fibration over a non-compact three dimensional complex projective spa…
Gauging Discrete Symmetries of -theories in Five Dimensions
Bobby Acharya, Neil Lambert, Marwan Najjar +2
We study the gauging of a discrete symmetry in the five-dimensional superconformal theories. We argue that this leads to an infinite sequence of five-dimension…
M2-Branes And The (2,0) Superalgebra
Neil Lambert, Damiano Sacco
We present a generalization of the six-dimensional (2,0) system of arXiv:1007.2982 to include a constant abelian 3-form. For vanishing 3-form this system is known to provide a vari…
Non-Relativistic Intersecting Branes, Newton-Cartan Geometry and AdS/CFT
Neil Lambert, Joseph Smith
We discuss non-relativistic variants of four-dimensional =4 super-Yang-Mills theory obtained from generalised Newton-Cartan geometric limits of D3-branes in ten-dimension…
(2,0) Lagrangian Structures
Neil Lambert
By including an additional self-dual three-form we construct a Lorentz invariant lagrangian for the abelian (2,0) tensor supermultiplet. The extra three-form is a supersymmetry sin…
Duality and Fluxes in the Sen Formulation of Self-Dual Fields
Neil Lambert
In Sen's formulation of self-dual fields one finds two closed forms: and . Only the former couples to sources and the spacetime metric. The latter has the wrong…
Comments on Multiple M2-branes
Jonathan Bagger, Neil Lambert
Recently a three-dimensional field theory was derived that is consistent with all the symmetries expected of the worldvolume action for multiple M2-branes. In this note we examine…
The M5-brane on K3 x T^2
Neil Lambert
We discuss the low energy effective theory of an M5-brane wrapped on a smooth holomorphic four-cycle of K3 x T^2, including the special case of T^6. In particular we give the lowes…
Non-Lorentzian Field Theories with Maximal Supersymmetry and Moduli Space Dynamics
Neil Lambert, Miles Owen
We present gauge theories in 2+1 and 4+1 dimensions with 16 supersymmetries which are invariant under rotations and translations but not boosts. The on-shell conditions reduce the…
Bosonic Symmetries of DLCQ Field Theories
Neil Lambert, Arthur Lipstein, Rishi Mouland +1
We investigate symmetries of the six-dimensional theory reduced along a compact null direction. The action for this theory was deduced by considering M-theory on $AdS_7 \ti…
M-Theory and Maximally Supersymmetric Gauge Theories
Neil Lambert
In this informal review for non-specalists we discuss the construction of maximally supersymmetric gauge theories that arise on the worldvolumes branes in String Theory and M-Theor…
Nonabelian (2,0) Tensor Multiplets and 3-algebras
Neil Lambert, Constantinos Papageorgakis
Using 3-algebras we obtain a nonabelian system of equations that furnish a representation of the (2,0)-supersymmetric tensor multiplet. The on-shell conditions are quite restrictiv…
The (2,0) Superalgebra, Null M-branes and Hitchin's System
Piotr Kucharski, Neil Lambert, Miles Owen
We present an interacting system of equations with sixteen supersymmetries and an R-symmetry where the fields depend on two space and one null dimensions that i…
Non-Lorentzian RG flows and Supersymmetry
Neil Lambert, Rishi Mouland
We describe a general process where a non-Lorentzian rescaling of a supersymmetric field theory leads to a scale-invariant fixed point action without Lorentz invariance but where t…
Reciprocal Non-Relativistic Decoupling Limits of String Theory and M-Theory
Neil Lambert, Joseph Smith
It has recently been realised that there are supersymmetry-preserving non-relativistic decoupling limits associated with each half-BPS object in String Theory and M-Theory. We argu…
Extended Gauge Theory Deformations From~Flux~Backgrounds
Neil Lambert, Domenico Orlando, Susanne Reffert +1
We consider supersymmetric deformations of gauge theories in various dimensions obtained from a String Theory realisation of branes embedded in flux backgrounds. In particular we o…
The M5-Brane Limit of Eleven-Dimensional Supergravity
Eric Bergshoeff, Neil Lambert, Joseph Smith
We construct the M5-brane limit of eleven-dimensional supergravity. The resulting action is invariant under Galilean boosts and has a local scale symmetry. We also consider the lim…
Five-Dimensional Path Integrals for Six-Dimensional Conformal Field Theories
Neil Lambert, Arthur Lipstein, Rishi Mouland +1
In this paper we derive Ward-Takahashi identities from the path integral of supersymmetric five-dimensional field theories with an spacetime symmetry in the presence of i…
Non-Lorentzian Avatars of (1,0) Theories
Neil Lambert, Tristan Orchard
We construct five-dimensional non-Lorentzian Lagrangian gauge field theories with an SU(1,3) conformal symmetry and 12 (conformal) supersymmetries. Such theories are interesting in…
M5-Branes, D4-Branes and Quantum 5D super-Yang-Mills
Neil Lambert, Constantinos Papageorgakis, Maximilian Schmidt-Sommerfeld
We revisit the relation of the six-dimensional (2,0) M5-brane Conformal Field Theory compactified on a circle to 5D maximally supersymmetric Yang-Mills Gauge Theory. We show that i…
Omega-Deformed Seiberg-Witten Effective Action from the M5-brane
Neil Lambert, Domenico Orlando, Susanne Reffert
We obtain the leading order corrections to the effective action of an M5-brane wrapping a Riemann surface in the eleven-dimensional supergravity Omega-background. The result can be…
A Path Integral for the Chiral-Form Partition Function
Enrico Andriolo, Neil Lambert, Tristan Orchard +1
Starting from the recent action proposed by Sen [1,2], we evaluate the partition function of the compact chiral boson on a two-dimensional torus using a path-integral formulation.…
The CFT of Sen's Formulation of Chiral Gauge Fields
Chris Hull, Neil Lambert
Sen's action for chiral bosons in 2 dimensions describes two chiral scalars, one of which couples to the physical metric and one of which couples to a flat metric. It has a general…
Non-Lorentzian Spacetime Symmetry in Various Dimensions
Neil Lambert, Rishi Mouland, Tristan Orchard
We discuss non-Lorentzian Lagrangian field theories in dimensions that admit an spacetime symmetry which includes a scaling transformation. These can be obtained b…
Multiple Membranes in M-theory
Jonathan Bagger, Neil Lambert, Sunil Mukhi +1
We review developments in the theory of multiple, parallel membranes in M-theory. After discussing the inherent difficulties pertaining to a maximally supersymmetric lagrangian for…
Constraints on Automorphic Forms of Higher Derivative Terms from Compactification
Finn Gubay, Neil Lambert, Peter West
By dimensionally reducing the higher derivative corrections of ten-dimensional IIB theory on a torus we deduce constraints on the E_{n+1} automorphic forms that occur in d=10-n dim…
Lessons from M2's and Hopes for M5's
Neil Lambert
In this talk we will review the construction of M2-brane SCFT's highlighting some novelties and the role of 3-algebras. Parts of our discussion will closely follow parts of arXiv:1…
Heterotic M2-branes
Neil Lambert
We construct the action for N M2-branes on . The resulting theory has a gauge anomaly but this can be cancelled if the two fixed point planes each support 8 chiral Fermi…
Compactifying the Sen Action: Six Dimensions
Neil Lambert, Yuchen Zhou
The Sen action for self-dual fields has been generalised by Hull to include two metrics which allows it to be defined on generic manifolds. In this paper we consider Kaluza-Klein c…
Duality Groups, Automorphic Forms and Higher Derivative Corrections
Neil Lambert, Peter West
We study the higher derivative corrections that occur in type II superstring theories in ten dimensions or less. Assuming invariance under a discrete duality group G(Z) we show tha…
Instanton Worldlines in Five-Dimensional -Deformed Gauge Theory
Neil Lambert, Arthur Lipstein, Rishi Mouland +1
We discuss the Bosonic sector of a class of supersymmetric non-Lorentzian five-dimensional gauge field theories with an conformal symmetry. These actions have a Lagrange…
Modeling Multiple M2's
Jonathan Bagger, Neil Lambert
We investigate the worldvolume theory that describes N coincident M2-branes ending on an M5 brane. We argue that the fields that describe the transverse spacetime coordinates take…
Periodic Arrays of M2-Branes
Imtak Jeon, Neil Lambert, Paul Richmond
We consider periodic arrays of M2-branes in the ABJM model in the spirit of a circle compactification to D2-branes in type IIA string theory. The result is a curious formulation of…
Null Reductions of M5-Branes
Neil Lambert, Tristan Orchard
We perform a general reduction of an M5-brane on a spacetime that admits a null Killing vector, including couplings to background 4-form fluxes and possible twisting of the normal…
Five-Dimensional Non-Lorentzian Conformal Field Theories and their Relation to Six-Dimensions
Neil Lambert, Arthur Lipstein, Rishi Mouland +1
We study correlation functions in five-dimensional non-Lorentzian theories with an conformal symmetry. Examples of such theories have recently been obtained as -defor…
Perturbation Theory From Automorphic Forms
Neil Lambert, Peter West
Using our previous construction of Eisenstein-like automorphic forms we derive formulae for the perturbative and non-perturbative parts for any group and representation. The result…
Membranes on an Orbifold
Neil Lambert, David Tong
We harvest clues to aid with the interpretation of the recently discovered N=8 supersymmetric Chern-Simons theory with SO(4) gauge symmetry. The theory is argued to describe two me…
RG Flows and Symmetry Enhancement in Five-Dimensional Lifshitz Gauge Theories
Neil Lambert, Joseph Smith
Lagrangian gauge theories with a z=2 Lifshitz scaling provide a family of interacting, asymptotically free five-dimensional field theories. We examine some of their quantum propert…
Moduli Stabilisation on the Worldsheet
Jawad Arshad, Neil Lambert, Andreas Recknagel
We consider compactifications of type II string theory using exact internal CFT's with central charge , , leading to an effective potential for the dilaton. For…
Three-Algebras and N=6 Chern-Simons Gauge Theories
Jonathan Bagger, Neil Lambert
We derive the general form for a three-dimensional scale-invariant field theory with N=6 supersymmetry, SU(4) R-symmetry and a U(1) global symmetry. The results can be written in t…