A5057702557- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Advanced Mathematical Identities
- Black Holes and Theoretical Physics
- Numerical methods for differential equations
- Particle Accelerators and Free-Electron Lasers
- Advanced Chemical Physics Studies
- Computational Physics and Python Applications
- Electronic and Structural Properties of Oxides
- Advanced Scientific and Engineering Studies
- Machine Learning in Materials Science
- Quantum Information and Cryptography
- Catalytic Processes in Materials Science
- Physics of Superconductivity and Magnetism
- Cosmology and Gravitation Theories
- Algorithms and Data Compression
- Optical Polarization and Ellipsometry
- Dark Matter and Cosmic Phenomena
- Quantum many-body systems
- Quantum and electron transport phenomena
- Advanced Combinatorial Mathematics
- Phytochemical Studies and Bioactivities
- Ferroelectric and Negative Capacitance Devices
Technical University of Munich
2014-2024
IBM (United States)
2024
Robert Bosch (Germany)
2023
University of Maryland, College Park
2023
ExxonMobil (United States)
2023
RIKEN Center for Advanced Photonics
2023
RIKEN Center for Quantum Computing
2023
Sandia National Laboratories
2023
Karlsruhe Institute of Technology
2016-2018
Max Planck Institute for Nuclear Physics
2017-2018
Inclusive Higgs boson production at large transverse momentum is induced by different channels. We focus on the leading through gluon fusion, and perform a consistent combination of state art calculations obtained in infinite-top-mass effective theory next-to-next-to-leading order (NNLO) full Standard Model (SM) next-to-leading (NLO). thus present approximate QCD predictions for this process NNLO, study corresponding perturbative uncertainties. This calculation then compared with those...
We reconstruct the explicit formalism of qubit quantum theory from elementary rules on an observer's information acquisition. Our approach is purely operational: we consider observer O interrogating a system S with binary questions and define S's state as O's `catalogue knowledge' about S. From derive spaces for N systems show that (a) they coincide set density matrices over N-qubit Hilbert space; (b) states evolve unitarily under group $\rm{PSU}(2^N)$ according to von Neumann evolution...
We present the calculation of massless two-loop Master Integrals relevant to five-point amplitudes with one off-shell external leg and derive complete set planar five on-mass-shell legs, that contribute many $2\to 3$ interest at LHC, as for instance three jet production, $\gamma, V, H +2$ jets etc., based on Simplified Differential Equations approach.
We give expressions for all generalized polylogarithms up to weight four in terms of the functions log, $\text{Li}_n$, and $\text{Li}_{2,2}$, valid arbitrary complex variables. Furthermore we provide algorithms manipulation numerical evaluation $\text{Li}_n$ add codes Mathematica C++ implementing results. With these results calculate a number previously unknown integrals, which App. C.
We compute the next-to-leading order QCD corrections to production of Higgs bosons with large transverse momentum $p_\perp \gg 2 m_t$ at LHC. To accomplish this, we combine two-loop amplitudes for processes $gg \to Hg$, $qg Hq$ and $q \bar q H g$, recently computed in approximation nearly massless top quarks, numerical calculation squared one-loop Hgg$, g g$ Hgg$ processes. The latter computation is performed OpenLoops. find that distribution very high $p_\perp$ are but quite similar...
We compute next-to-leading order QCD corrections to the top-bottom interference contribution H+j production at LHC. To achieve this, we combine recent computation of two-loop amplitudes for gg -> Hg and qg Hq, performed in approximation a small b-quark mass, numerical calculation squared one-loop Hgg Hqg within OpenLoops. find that are large similar top-mediated Higgs cross section. also observe significant reduction mass-renormalization scheme uncertainty, once NLO prediction is employed.
We present predictions for the total cross sections pair production of squarks and gluinos at LHC including a combined NNLL resummation soft Coulomb gluon effects. derive all terms in NNLO section that are enhanced near threshold, which include contributions from spin-dependent potentials so-called annihilation corrections. The corrections $$ \sqrt{s}=13 TeV range up to 20% squark-squark 90% gluino relative NLO results reduce theoretical uncertainties perturbative calculation 10% level. Grid...
We analytically compute the two-loop scattering amplitude $gg \to Hg$ assuming that mass of quark, mediates ggH interaction, is vanishingly small. Our computation provides an important ingredient required to improve theoretical description top-bottom interference effect in Higgs boson production gluon fusion, and elucidate its impact on transverse momentum distribution.
A bstract We present a calculation of all matching coefficients for N -jettiness beam functions at next-to-next-to-next-to-leading order (N 3 LO) in perturbative quantum chromodynamics (QCD). Our computation is performed starting from the respective collinear splitting kernels, which we integrate using axial gauge. use reverse unitarity to map relevant phase-space integrals loop integrals, allows us employ multi-loop techniques including integration-by-parts identities and differential...
A new approach to compute Feynman Integrals is presented. It relies on an integral representation of a given Integral in terms simpler ones. Using this approach, we present, for the first time, results certain family non-planar five-point two-loop Master with one external off-shell particle, relevant instance $H+2$ jets production at LHC, both Euclidean and physical kinematical regions.
We present predictions of the total cross sections for pair production squarks and gluinos at LHC, including stop-antistop process. Our calculation supplements full fixed-order NLO with resummation threshold logarithms Coulomb singularities next-to-leading logarithmic (NLL) accuracy, bound-state effects. The numerical effect higher-order terms can be as big or larger than that soft-gluon corrections. For a selection benchmark points accessible data from 2010-2012 LHC runs, leads to an...
We compute the two-loop QCD corrections to $qg\ensuremath{\rightarrow}Hq$ and $q\overline{q}\ensuremath{\rightarrow}Hg$ amplitudes mediated by loops of nearly massless quarks. These provide last missing ingredient required next-to-leading-order top-bottom interference contribution Higgs boson transverse momentum distribution at hadron colliders.
We calculate the complete set of two-loop Master Integrals with two off massshell legs massless internal propagators, that contribute to amplitudes diboson V 1 2 production at LHC. This is done Simplified Differential Equations approach Integrals, which was recently proposed by one authors.
We provide a precise description of the Higgs boson transverse momentum distribution including top and bottom quark contributions, that is valid for momenta in range mb < pt mt, where mt are masses. This based on combination fixed next-to-leading order (NLO) results with next-to-next-to-leading logarithmic (NNLL) resummation. show ambiguities resummation procedure b-quark loops same as related fixed-order uncertainties. conclude current uncertainty top-bottom interference contribution to...
In this work, we test a recently developed method to enhance classical auxiliary-field quantum Monte Carlo (AFQMC) calculations with computers against examples from chemistry and material science, representative of classes industry-relevant systems. As molecular cases, calculate the energy curve H4 relative energies ozone singlet oxygen respect triplet oxygen, which is industrially relevant in organic oxidation reactions. We find that trial wave functions beyond single Slater determinants...
We present the matching coefficient for quark beam function at next-to-next-to-next-to-leading order in perturbative QCD generalized large ${N}_{c}$-approximation, ${N}_{c}\ensuremath{\sim}{N}_{f}\ensuremath{\gg}1$. Although several refinements are still needed to make this result interesting phenomenological applications, our computation shows that a fully-differential description of simple color singlet production processes hadron collider ${\mathrm{N}}^{3}\mathrm{LO}$ is within reach.
We compute the two-loop QCD corrections to amplitudes for processes $g g \to H g, q q$ and $q \bar{q} g$ in limit when Higgs transverse momentum is larger than top quark mass, $p_\perp \gg m_t$. These are important ingredients understanding higher-order effects on distribution at large $p_\perp$.
In this contribution we present the Simplified Differential Equations approach for Master Integrals.Combined with integrand reduction method two-loop amplitudes it can pave road a fully automated NNLO calculation framework.The of planar pentabox Integrals up to one off-shell leg and derivation complete set five on-shell legs, is highlighted.
In this work, we test a recently developed method to enhance classical auxiliary-field quantum Monte Carlo (AFQMC) calculations with computers against examples from chemistry and material science, representatives of classes industry-relevant systems. As molecular cases, calculate the energy curve H4 relative energies ozone singlet oxygen respect triplet oxygen, which are industrially relevant in organic oxidation reactions. We find that trial wave functions beyond single Slater determinants...
We compute the master integrals required for calculation of double-real emission contributions to matching coefficients 0-jettiness beam functions at next-to-next-to-next-to-leading order in perturbative QCD. As an application, we combine these and derive gluon contribution coefficient $I_{qq}(t,z)$ quark function.
Quantum computers (QC) could harbor the potential to significantly advance materials simulations, particularly at atomistic scale involving strongly correlated fermionic systems where an accurate description of quantum many-body effects scales unfavorably with size. While a full-scale treatment condensed matter currently available noisy remains elusive, embedding schemes like dynamical mean-field theory (DMFT) allow mapping effective, reduced subspace Hamiltonian devices improve accuracy ab...
We present predictions for the total cross sections pair production of squarks and gluinos at LHC including a combined NNLL resummation soft Coulomb gluon effects.The corrections can be up to 25% relative previous NLL results reduce theoretical uncertainties 10% level.
We compute the three-loop master integrals required for calculation of triple-real contribution to N$^3$LO quark beam function due splitting a into virtual and three collinear gluons, $q \to q^*+ggg$. This provides an important ingredient leading-color at N$^3$LO.