Prof. Dr. Jan Plefka
Profil
Forschungsthemen20
Berlin Center for Theoretical Physics
Quelle ↗Zeitraum: 01/2016 - 12/2017 Projektleitung: Prof. Dr. Jan Plefka
DFG-Sachbeihilfe: Yang’sche Symmetrie in der Quanten-Eichfeldtheorie
Quelle ↗Förderer: DFG Sachbeihilfe Zeitraum: 01/2017 - 09/2020 Projektleitung: Prof. Dr. Jan Plefka
EU: Scattering Amplitudes: From Geometry to EXperiment (SAGEX)
Quelle ↗Förderer: Horizon 2020: Innovative Training Network ITN Zeitraum: 09/2018 - 08/2022 Projektleitung: Prof. Dr. Jan Plefka
FOR 5582/1: Moderne Grundlagen von Streuamplituden (TP 09)
Quelle ↗Förderer: DFG Forschungsgruppe Zeitraum: 11/2025 - 10/2029 Projektleitung: Prof. Dr. Jan Plefka
GRK 1504/1: Masse, Spektrum, Symmetrie: Teilchenphysik in der Ära des Large Hadron Colliders
Quelle ↗Förderer: DFG Graduiertenkolleg Zeitraum: 04/2009 - 12/2013 Projektleitung: Prof. Dr. Jan Plefka
GRK 2575/1: Überdenken der Quantenfeldtheorie
Quelle ↗Förderer: DFG Graduiertenkolleg Zeitraum: 04/2020 - 09/2024 Projektleitung: Prof. Dr. Jan Plefka
GRK 2575/2: Überdenken der Quantenfeldtheorie
Quelle ↗Förderer: DFG Graduiertenkolleg Zeitraum: 10/2024 - 03/2029 Projektleitung: Prof. Dr. Jan Plefka
GRK 2575: Überdenken der Quantenfeldtheorie
Quelle ↗Förderer: DFG Graduiertenkolleg Zeitraum: 04/2020 - 03/2029 Projektleitung: Prof. Dr. Jan Plefka
High-Precision Gravitational Wave Physics from a Worldline Quantum Field theory (GraWFTy)
Quelle ↗Förderer: Horizon Europe: ERC Advanced Grant Zeitraum: 10/2023 - 09/2028 Projektleitung: Prof. Dr. Jan Plefka
International Max-Planck Research School for Geometric Analysis, Gravitation and String Theory
Quelle ↗Zeitraum: 01/2007 - 12/2015 Projektleitung: Prof. Dr. Jan Plefka
International Max Planck Research School for Mathematical and Physical Aspects of Gravitation, Cosmology and Quantum Field Theory (IMPRS)
Quelle ↗Zeitraum: 10/2016 - 09/2022 Projektleitung: Prof. Dirk Kreimer, Prof. Dr. Hermann Nicolai
Kolleg Mathematik Physik Berlin
Quelle ↗Zeitraum: 01/2016 - 12/2020 Projektleitung: Prof. Dirk Kreimer, Prof. Dr. Gavril Farkas, Prof. Dr. Jan Plefka
Lichtenberg-Stiftungsprofessur: The Fundamental Structure of String Theory and Its Relation to Gauge Field Theories
Quelle ↗Förderer: Volkswagen Stiftung Zeitraum: 02/2006 - 12/2011 Projektleitung: Prof. Dr. Jan Plefka
Scattering Amplitudes: from Geometry to EXperiment
Quelle ↗Förderer: Horizon 2020: Innovative Training Network ITN Zeitraum: 09/2018 - 08/2022 Projektleitung: Prof. Dr. Matthias Staudacher, Prof. Dr. Jan Plefka
SFB 647/1: Conformal Symmetry, Supergravity, and the AdS/CFT Correspondence (TP A06)
Quelle ↗Förderer: DFG Sonderforschungsbereich Zeitraum: 10/2006 - 09/2008 Projektleitung: Prof. Dr. Jan Plefka
SFB 647/1: Evolution of Geometrical Structures in Classical and Quantum Cosmology (TP B05)
Quelle ↗Förderer: DFG Sonderforschungsbereich Zeitraum: 10/2006 - 12/2008 Projektleitung: Prof. Dr. Jan Plefka
SFB 647/2–3: Integrable Structures in the Gauge/String Theory Correspondence (TP B08/C05)
Quelle ↗Förderer: DFG Sonderforschungsbereich Zeitraum: 01/2009 - 12/2016 Projektleitung: Prof. Dr. Jan Plefka
SFB 647/2–3: Scattering Amplitudes (TP A08/C06)
Quelle ↗Förderer: DFG Sonderforschungsbereich Zeitraum: 01/2009 - 12/2016 Projektleitung: Prof. Dr. Jan Plefka
The Fundamental Structure of String Theory and Its Relation to Gauge Field Theories-Continuation
Quelle ↗Förderer: Volkswagen Stiftung Zeitraum: 02/2011 - 01/2014 Projektleitung: Prof. Dr. Jan Plefka
VA: 42nd International Symposium Ahrenshoop on the Theory of Elementary Particles
Quelle ↗Förderer: DFG sonstige Programme Zeitraum: 08/2014 - 08/2014 Projektleitung: Prof. Dr. Jan Plefka
Mögliche Industrie-Partner10
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Publikationen25
Top 25 nach Zitationen — Quelle: OpenAlex (BAAI/bge-m3 embedded für Matching).
Nuclear Physics B · 287 Zitationen · DOI
Physical Review Letters · 189 Zitationen · DOI
Using the recently established formalism of a worldline quantum field theory description of the classical scattering of two spinless black holes, we compute the far-field time-domain waveform of the gravitational waves produced in the encounter at leading order in the post-Minkowskian (weak field but generic velocity) expansion. We reproduce the previous results of Kovacs and Thorne in a highly economic way. Then, using the waveform, we extract the leading-order total radiated angular momentum and energy (including differential results). Our work may enable crucial improvements of gravitational-wave predictions in the regime of large relative velocities.
Lecture notes in physics · 167 Zitationen · DOI
The off-shell symmetry algebra of the light-cone AdS<sub>5</sub>×<i>S</i><sup>5</sup>superstring
2007Journal of Physics A Mathematical and Theoretical · 166 Zitationen · DOI
We analyze the psu(2,2|4) supersymmetry algebra of a superstring propagating in the AdS_5 x S^5 background in the uniform light-cone gauge. We consider the off-shell theory by relaxing the level-matching condition and take the limit of infinite light-cone momentum, which decompactifies the string world-sheet. We focus on the psu(2|2)+psu(2|2) subalgebra which leaves the light-cone Hamiltonian invariant and show that it undergoes extension by a central element which is expressed in terms of the level-matching operator. This result is in agreement with the conjectured symmetry algebra of the dynamic S-matrix in the dual N=4 gauge theory.
Living Reviews in Relativity · 165 Zitationen · DOI
In this introductory review we discuss dynamical tests of the <i>AdS</i><sub>5</sub> × <i>S</i><sup>5</sup> string/[Formula: see text] Super Yang-Mills duality. After a brief introduction to AdS/CFT, we argue that semiclassical string energies yield information on the quantum spectrum of the string in the limit of large angular momenta on the <i>S</i><sup>5</sup>. The energies of the folded and circular spinning string solutions rotating on a <i>S</i><sup>3</sup> within the <i>S</i><sup>5</sup> are derived, which yield all-loop predictions for the dual gauge theory scaling dimensions. These follow from the eigenvalues of the dilatation operator of [Formula: see text] Super Yang-Mills in a minimal SU(2) subsector, and we display its reformulation in terms of a Heisenberg <i>s</i> = 1/2 spin chain along with the coordinate Bethe ansatz for its explicit diagonalization. In order to make contact to the spinning string energies, we then study the thermodynamic limit of the one-loop gauge theory Bethe equations and demonstrate the matching with the folded and closed string result at this loop order. Finally, the known gauge theory results at higher-loop orders are reviewed and the associated long-range spin chain Bethe ansatz is introduced, leading to an asymptotic all-loop conjecture for the gauge theory Bethe equations. This uncovers discrepancies at the three-loop order between gauge theory scaling dimensions and string theory energies and the implications of this are discussed. Along the way, we comment on further developments and generalizations of the subject and point to the relevant literature.
Physical Review Letters · 134 Zitationen · DOI
The recently established formalism of a worldline quantum field theory, which describes the classical scattering of massive bodies (black holes, neutron stars, or stars) in Einstein gravity, is generalized up to quadratic order in spin, revealing an alternative N=2 supersymmetric description of the symmetries inherent in spinning bodies. The far-field time domain waveform of the gravitational waves produced in such a spinning encounter is computed at leading order in the post-Minkowskian (weak field, but generic velocity) expansion, and exhibits this supersymmetry. From the waveform we extract the leading-order total radiated angular momentum in a generic reference frame, and the total radiated energy in the center-of-mass frame to leading order in a low-velocity approximation.
Journal of Physics A Mathematical and General · 120 Zitationen · DOI
We use the uniform light-cone gauge to derive an exact gauge-fixed Lagrangian and light-cone Hamiltonian for the Green–Schwarz superstring in AdS5 × S5. We then quantize the theory perturbatively in the near plane wave limit, and compute the leading 1/J correction to a generic string state from the rank-1 subsectors. These investigations enable us to propose a new set of light-cone Bethe equations for the quantum string. The equations have a simple form and yield the correct spinning string and flat space limits. Finally, we clarify the notion of closed sectors in string theory by proving the existence of perturbative effective string Hamiltonians which are direct analogues of (all-loop) dilatation operators in the dual N = 4 gauge theory.
Nuclear Physics B · 111 Zitationen · DOI
Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D, Particles, fields, gravitation, and cosmology · 110 Zitationen · DOI
We formulate the Hopf algebra underlying the $\mathfrak{s}\mathfrak{u}(2|2)$ world sheet $S$-matrix of the ${\mathrm{AdS}}_{5}\ifmmode\times\else\texttimes\fi{}{S}^{5}$ string in the AdS/CFT correspondence. For this we extend the previous construction in the $\mathfrak{s}\mathfrak{u}(1|2)$ subsector due to Janik to the full algebra by specifying the action of the coproduct and the antipode on the remaining generators. The nontriviality of the coproduct is determined by length-changing effects and results in an unusual central braiding. As an application we explicitly determine the antiparticle representation by means of the established antipode.
Journal of High Energy Physics · 105 Zitationen · DOI
A bstract We exhibit an initial-value formulation of the worldline quantum field theory (WQFT) approach to the classical two-body problem in general relativity. We show that the Schwinger-Keldysh (in-in) formalism leads to purely retarded propagators in the evaluation of observables in the WQFT. Integration technology for retarded master integrals is introduced at third post-Minkowskian (3PM) order. As an application we compute the complete radiation-reacted impulse and radiated four momentum for the scattering of two non-spinning neutron stars including tidal effects at 3PM order, as well as the leading (2PM) far-field gravitational waveform.
Nuclear Physics B · 102 Zitationen · DOI
Recently a mass deformation of the maximally supersymmetric Yang–Mills quantum mechanics has been constructed from the supermembrane action in eleven-dimensional plane-wave backgrounds. However, the origin of this plane-wave matrix theory in terms of a compactification of a higher-dimensional super-Yang–Mills model has remained obscure. In this paper we study the Kaluza–Klein reduction of D=4, N=4 super-Yang–Mills theory on a round three-sphere, and demonstrate that the plane-wave matrix theory arises through a consistent truncation to the lowest lying modes. We further explore the relation between the dilatation operator of the conformal field theory and the Hamiltonian of the quantum mechanics through perturbative calculations up to two-loop order. In particular, we find that the one-loop anomalous dimensions of pure scalar operators are completely captured by the plane-wave matrix theory. At two-loop level this property ceases to exist.
Journal of High Energy Physics · 100 Zitationen · DOI
Recently it has been argued that tree-level scattering amplitudes in $$ \mathcal{N} = 4 $$ Yang-Mills theory are uniquely determined by a careful study of their superconformal and Yangian symmetries. However, at one-loop order these symmetries are known to become anomalous due to infrared divergences. We compute these one-loop anomalies for amplitudes defined through dimensional regularisation by studying the tree-level symmetry transformations of the unitarity branch cuts, keeping track of the crucial collinear terms arising from the holomorphic anomaly. We extract the superconformal anomalies and show that they may be cancelled through a universal one-loop deformation of the treelevel symmetry generators which involves only tree-level data. Specialising to the planar theory we also obtain the analogous deformation for the level-one Yangian generator of momentum. Explicit checks of our one-loop deformation are performed for MHV and the 6-point NMHV amplitudes.
Physical review. D/Physical review. D. · 99 Zitationen · DOI
We compute the classical effective action of color charges moving along worldlines by integrating out the Yang-Mills gauge field to next-to-leading order in the coupling. An adapted version of the Bern-Carrasco-Johansson (BCJ) double-copy construction known from quantum scattering amplitudes is then applied to the Feynman integrands, yielding the prediction for the classical effective action of point masses in dilaton gravity. We check the validity of the result by independently constructing the effective action in dilaton gravity employing field redefinitions and gauge choices that greatly simplify the perturbative construction. Complete agreement is found at next-to-leading order. Finally, upon performing the post-Newtonian expansion of our result, we find agreement with the corresponding action of scalar-tensor theories known from the literature. Our results represent a proof of concept for the classical double-copy construction of the gravitational effective action and provides another application of a BCJ-like double copy beyond scattering amplitudes.
Physics Letters B · 97 Zitationen · DOI
The question of a modification of the running gauge coupling of (non-)Abelian gauge theories by an incorporation of the quantum gravity contribution has recently attracted considerable interest. In this Letter we perform an involved diagrammatical calculation in the full Einstein–Yang–Mills system both in cut-off and dimensional regularization at one-loop order. It is found that all gravitational quadratic divergencies cancel in cut-off regularization and are trivially absent in dimensional regularization so that there is no alteration to asymptotic freedom at high energies. This settles the previously open question of a potential regularization scheme dependence of the one-loop β function traditionally computed in the background field approach. Furthermore we show that the remaining logarithmic divergencies give rise to an extended effective Einstein–Yang–Mills Lagrangian with a counterterm of dimension six.
Physics Letters B · 89 Zitationen · DOI
Physical Review Letters · 84 Zitationen · DOI
Using the N=1 supersymmetric, spinning worldline quantum field theory formalism, we compute the conservative spin-orbit part of the momentum impulse Δp_{i}^{μ}, spin kick ΔS_{i}^{μ}, and scattering angle θ from the scattering of two spinning massive bodies (black holes or neutron stars) up to fourth post-Minkowskian (PM) order. These three-loop results extend the state of the art for generically spinning binaries from 3PM to 4PM. They are obtained by employing recursion relations for the integrand construction and advanced multiloop Feynman integral technology in the causal (in-in) worldline quantum field theory framework to directly produce classical observables. We focus on the conservative contribution (including tail effects) and outline the computations for the dissipative contributions as well. Our spin-orbit results agree with next-to-next-to-next-to-leading-order post-Newtonian and test-body data in the respective limits. We also reconfirm the conservative 4PM nonspinning results.
Journal of Physics A Mathematical and Theoretical · 82 Zitationen · DOI
Abstract This is an introduction to, and invitation to read, a series of review articles on scattering amplitudes in gauge theory, gravity, and superstring theory. Our aim is to provide an overview of the field, from basic aspects to a selection of current (2022) research and developments.
Physical Review Letters · 79 Zitationen · DOI
We compute the fifth post-Minkowskian (5PM) order contributions to the scattering angle and impulse of classical black hole scattering in the conservative sector at first self-force order using the worldline quantum field theory formalism. This challenging four-loop computation required the use of advanced integration-by-parts and differential equation technology implemented on high-performance computing systems. Use of partial fraction identities allowed us to render the complete integrand in a fully planar form. The resulting function space is simpler than expected: In the scattering angle, we see only multiple polylogarithms up to weight three and a total absence of the elliptic integrals that appeared at 4PM order. All checks on our result, both internal-cancellation of dimensional regularization poles and preservation of the on-shell condition-and external-matching the slow-velocity limit with the post-Newtonian (PN) literature up to 5PN order and matching the tail terms to the 4PM loss of energy-are passed.
Physical Review Letters · 68 Zitationen · DOI
We compute the radiation reacted momentum impulse Δp_{i}^{μ}, spin kick ΔS_{i}^{μ}, and scattering angle θ between two scattered spinning massive bodies (black holes or neutron stars) using the N=1 supersymmetric worldline quantum field theory formalism up to fourth post-Minkowskian (4PM) order. Our calculation confirms the state-of-the-art nonspinning results, and extends them to include spin-orbit effects. Advanced multiloop Feynman integral technology including differential equations and the method of regions are applied and extended to deal with the retarded propagators arising in a causal description of the scattering dynamics. From these results we determine a complete set of radiative fluxes at subleading PM order: the 4PM radiated four-momentum and, via linear response, the 3PM radiated angular momentum, both again including spin-orbit effects.
Physical review. D/Physical review. D. · 67 Zitationen · DOI
We demonstrate that a recently proposed classical double-copy procedure to construct the effective action of two massive particles in dilaton-gravity from the analogous problem of two color-charged particles in Yang-Mills gauge theory fails at next-to-next-to-leading order perturbative expansions, i.e., in the third order of the post-Minkowskian and the second order in the post-Newtonian expansions.
Lecture notes in physics · 66 Zitationen · DOI
Nuclear Physics B · 64 Zitationen · DOI
Journal of High Energy Physics · 60 Zitationen · DOI
Journal of High Energy Physics · 58 Zitationen · DOI
Planar $ \mathcal{N} $ = 4 Super Yang-Mills theory appears to be a quantum integrable four-dimensional conformal theory. This has been used to find equations believed to describe its exact spectrum of anomalous dimensions. Integrability seemingly also extends to the planar space-time scattering amplitudes of the $ \mathcal{N} $ = 4 model, which show strong signs of Yangian invariance. However, in contradistinction to the spectral problem, this has not yet led to equations determining the exact amplitudes. We propose that the missing element is the spectral parameter, ubiquitous in integrable models. We show that it may indeed be included into recent on-shell approaches to scattering amplitude integrands, providing a natural deformation of the latter. Under some constraints, Yangian symmetry is preserved. Finally we speculate that the spectral parameter might also be the regulator of choice for controlling the infrared divergences appearing when integrating the integrands in exactly four dimensions.
Journal of High Energy Physics · 57 Zitationen · DOI
Kooperationen14
Bestätigte Forscher↔Partner-Paare aus HU-FIS — Gold-Standard-Positive für das Matching.
EU: Scattering Amplitudes: From Geometry to EXperiment (SAGEX)
other
GRK 2575/2: Überdenken der Quantenfeldtheorie
other
International Max-Planck Research School for Geometric Analysis, Gravitation and String Theory
university
SFB 647/1: Evolution of Geometrical Structures in Classical and Quantum Cosmology (TP B05)
university
SFB 647/1: Conformal Symmetry, Supergravity, and the AdS/CFT Correspondence (TP A06)
university
GRK 2575/2: Überdenken der Quantenfeldtheorie
other
EU: Scattering Amplitudes: From Geometry to EXperiment (SAGEX)
university
EU: Scattering Amplitudes: From Geometry to EXperiment (SAGEX)
company
GRK 1504/1: Masse, Spektrum, Symmetrie: Teilchenphysik in der Ära des Large Hadron Colliders
university
EU: Scattering Amplitudes: From Geometry to EXperiment (SAGEX)
university
EU: Scattering Amplitudes: From Geometry to EXperiment (SAGEX)
university
SFB 647/1: Evolution of Geometrical Structures in Classical and Quantum Cosmology (TP B05)
university
EU: Scattering Amplitudes: From Geometry to EXperiment (SAGEX)
university
International Max-Planck Research School for Geometric Analysis, Gravitation and String Theory
university
Stammdaten
Identität, Organisation und Kontakt aus HU-FIS.
- Name
- Prof. Dr. Jan Plefka
- Titel
- Prof. Dr.
- Fakultät
- Mathematisch-Naturwissenschaftliche Fakultät
- Institut
- Institut für Physik
- Arbeitsgruppe
- Theoretische Physik (Quantenfeldtheorie jenseits des Standardmodells und Stringtheorie)
- Telefon
- +49 30 2093-66409
- HU-FIS-Profil
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