Simon Ekhammar
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View article: Demystifying the massless sector in AdS3 quantum spectral curve
Demystifying the massless sector in AdS3 quantum spectral curve Open
A bstract We show that in the asymptotic large-volume limit, the original proposal for Quantum Spectral Curve for AdS 3 × S 3 × T 4 with R-R flux has a wider class of solutions, than studied previously. We argue that in this limit the QSC …
View article: Regge Trajectories of N=4 SYM Part I: General Asymptotic Baxter-Bethe Ansatz
Regge Trajectories of N=4 SYM Part I: General Asymptotic Baxter-Bethe Ansatz Open
In this work, we derive a novel set of equations - the Asymptotic Baxter--Bethe Ansatz - that determine the asymptotic spectrum of Regge trajectories in the BFKL regime of N=4 SYM. In this challenging limit, our method yields multi-loop re…
View article: New approach to strongly coupled $$ \mathcal{N} $$ = 4 SYM via integrability
New approach to strongly coupled $$ \mathcal{N} $$ = 4 SYM via integrability Open
A bstract Finding a systematic expansion of the spectrum of free superstrings on AdS 5 × S 5 , or equivalently strongly coupled $$ \mathcal{N} $$ = 4 SYM in the planar limit, remains an outstanding challenge. No first principle string th…
View article: Demystifying the Massless Sector in AdS_3 Quantum Spectral Curve
Demystifying the Massless Sector in AdS_3 Quantum Spectral Curve Open
We show that in the asymptotic large-volume limit, the original proposal for Quantum Spectral Curve for AdS3 x S3 x T4 with R-R flux has a wider class of solutions, than studied previously. We argue that in this limit the QSC reduces to a …
View article: Long Range Asymptotic Baxter-Bethe Ansatz for N=4 BFKL
Long Range Asymptotic Baxter-Bethe Ansatz for N=4 BFKL Open
We demonstrate that the Balitsky-Fadin-Kuraev-Lipatov regime of maximally supersymmetric Yang-Mills theory can be explicitly solved up to the L+1 order in weak coupling by uncovering a novel long-range asymptotic Baxter-Bethe ansatz for tr…
View article: New Approach to Strongly Coupled N = 4 SYM via Integrability
New Approach to Strongly Coupled N = 4 SYM via Integrability Open
Finding a systematic expansion of the spectrum of free superstrings on AdS${}_5\times $S${}^5$, or equivalently strongly coupled N = 4 SYM in the planar limit, remains an outstanding challenge. No first principle string theory methods are …
View article: Boundary overlaps from Functional Separation of Variables
Boundary overlaps from Functional Separation of Variables Open
A bstract In this paper we show how the Functional Separation of Variables (FSoV) method can be applied to the problem of computing overlaps with integrable boundary states in integrable systems. We demonstrate our general method on the ex…
View article: Boundary Overlaps from Functional Separation of Variables
Boundary Overlaps from Functional Separation of Variables Open
In this paper we show how the Functional Separation of Variables (FSoV) method can be applied to the problem of computing overlaps with integrable boundary states in integrable systems. We demonstrate our general method on the example of a…
View article: Exploring the Quantum Spectral Curve for AdS3/CFT2
Exploring the Quantum Spectral Curve for AdS3/CFT2 Open
A bstract Despite the rich and fruitful history of the integrability approach to string theory on the AdS 3 × S 3 × T 4 background, it has not been possible to extract many concrete predictions from integrability, except in a strict asympt…
View article: The ABJM Hagedorn Temperature from Integrability
The ABJM Hagedorn Temperature from Integrability Open
A bstract We use the quantum spectral curve to compute the Hagedorn temperature for ABJM theory in terms of the interpolating function h ( λ ). At weak coupling we compute this temperature up to eight-loop order, showing that it matches th…
View article: The asymptotic form of the Hagedorn temperature in planar super Yang-Mills
The asymptotic form of the Hagedorn temperature in planar super Yang-Mills Open
Using the supergravity dual and the plane-wave limit as a guide, we conjecture the asymptotic large coupling form of the Hagedorn temperature for planar super Yang-Mills to order . This is two orders beyond the presently known behavi…
View article: The ABJM Hagedorn Temperature from Integrability
The ABJM Hagedorn Temperature from Integrability Open
We use the quantum spectral curve to compute the Hagedorn temperature for ABJM theory in terms of the interpolating function $h(λ)$. At weak coupling we compute this temperature up to eight-loop order, showing that it matches the known tre…
View article: The asymptotic form of the Hagedorn temperature in planar $\mathcal{N}=4$ super Yang-Mills
The asymptotic form of the Hagedorn temperature in planar $\mathcal{N}=4$ super Yang-Mills Open
Using the supergravity dual and the plane-wave limit as a guide, we conjecture the asymptotic large coupling form of the Hagedorn temperature for planar $\mathcal{N}=4$ super Yang-Mills to order $1/\sqrtλ$. This is two orders beyond the pr…
View article: Exploring the Quantum Spectral Curve for AdS${}_3$/CFT${}_2$
Exploring the Quantum Spectral Curve for AdS${}_3$/CFT${}_2$ Open
Despite the rich and fruitful history of the integrability approach to string theory on the $AdS_3\times S^3\times T^4$ background, it has not been possible to extract many concrete predictions from integrability, except in a strict asympt…
View article: Mondromy Bootstrap for SU(2|2) Quantum Spectral Curves: From Hubbard model to AdS3/CFT2
Mondromy Bootstrap for SU(2|2) Quantum Spectral Curves: From Hubbard model to AdS3/CFT2 Open
We propose a procedure to derive quantum spectral curves of AdS/CFT type by requiring that a specially designed analytic continuation around the branch point results in an automorphism of the underlying algebraic structure. In this way we …
View article: Bethe Algebra using Pure Spinors
Bethe Algebra using Pure Spinors Open
We propose a gl(r)-covariant parameterisation of Bethe algebra appearing in so(2r) integrable models, demonstrate its geometric origin from a fused flag, and use it to compute the spectrum of periodic rational spin chains, for various choi…
View article: Extended systems of Baxter Q-functions and fused flags I: simply-laced case
Extended systems of Baxter Q-functions and fused flags I: simply-laced case Open
The spectrum of integrable models is often encoded in terms of commuting functions of a spectral parameter that satisfy functional relations. We propose to describe this commutative algebra in a covariant way by means of the extended Q-sys…
View article: Extended systems of Baxter Q-functions and fused flags I: simply-laced\n case
Extended systems of Baxter Q-functions and fused flags I: simply-laced\n case Open
The spectrum of integrable models is often encoded in terms of commuting\nfunctions of a spectral parameter that satisfy functional relations. We propose\nto describe this commutative algebra in a covariant way by means of the\nextended Q-…