Publications (37)
Magnetic catalysis and inverse magnetic catalysis in QCD
Niklas Mueller, Jan M. Pawlowski
We investigate the effects of strong magnetic fields on the QCD phase structure at vanishing density by solving the gluon and quark gap equations, and by studying the dynamics of t…
Quantum computation of dynamical quantum phase transitions and entanglement tomography in a lattice gauge theory
Niklas Mueller, Joseph A. Carolan, Andrew Connelly +3
Strongly-coupled gauge theories far from equilibrium may exhibit unique features that could illuminate the physics of the early universe and of hadron and ion colliders. Studying r…
Toward Exploring Phase Diagrams of Gauge Theories on Quantum Computers with Thermal Pure Quantum States
Zohreh Davoudi, Niklas Mueller, Connor Powers
Aiming at evading the notorious sign problem in classical Monte-Carlo approaches to lattice quantum chromodynamics, we present an approach for quantum computing finite-temperature…
Anomaly-induced dynamical refringence in strong-field QED
Niklas Mueller, Florian Hebenstreit, Jürgen Berges
We investigate the impact of the Adler-Bell-Jackiw anomaly on the nonequilibrium evolution of strong-field quantum electrodynamics (QED) using real-time lattice gauge theory techni…
Entanglement Structure of Non-Gaussian States and How to Measure It
Henry Froland, Torsten V. Zache, Robert Ott +1
Rapidly growing capabilities of quantum simulators to probe quantum many-body phenomena require new methods to characterize increasingly complex states. We present a protocol that…
Toward Quantum Computing Phase Diagrams of Gauge Theories with Thermal Pure Quantum States
Zohreh Davoudi, Niklas Mueller, Connor Powers
The phase diagram of strong interactions in nature at finite temperature and chemical potential remains largely unexplored theoretically due to inadequacy of Monte-Carlo-based comp…
Diffractive Dijet Production and Wigner Distributions from the Color Glass Condensate
Heikki Mäntysaari, Niklas Mueller, Björn Schenke
Experimental processes that are sensitive to parton Wigner distributions provide a powerful tool to advance our understanding of proton structure. In this work, we compute gluon Wi…
Simulating chiral magnetic effect and anomalous transport phenomena in the pre-equilibrium stages of heavy-ion collisions
Mark Mace, Niklas Mueller, Soeren Schlichting +1
We present a first principles approach to study the Chiral Magnetic Effect during the pre-equilibrium stage of a heavy-ion collision. We discuss the dynamics of the Chiral Magnetic…
Benchmarking quantum simulation at scale
Jeremy Hartse, Mohsin Raza, Shravan Shravan +2
The paper introduces a scalable verification method for non‑equilibrium quantum simulations using stabilizer scars, enabling efficient fidelity estimation and providing a benchmark…
Single-particle digitization strategy for quantum computation of a scalar field theory
João Barata, Niklas Mueller, Andrey Tarasov +1
Motivated by the parton picture of high energy quantum chromodynamics, we develop a single-particle digitization strategy for the efficient quantum simulation of relativistic scatt…
Classical shadows for sample-efficient measurements of gauge-invariant observables
Jacob Bringewatt, Henry Froland, Andreas Elben +1
Classical shadows provide a versatile framework for estimating many properties of quantum states from repeated, randomly chosen measurements without requiring full quantum state to…
Chiral instabilities & the onset of chiral turbulence in QED plasmas
Mark Mace, Niklas Mueller, Sören Schlichting +1
We present a first principles study of chiral plasma instabilities and the onset of chiral turbulence in QED plasmas far from equilibrium. By performing classical-statistical latti…
Chiral magnetic effect and anomalous transport from real-time lattice simulations
Niklas Mueller, Sören Schlichting, Sayantan Sharma
We present a first-principle study of anomaly induced transport phenomena by performing real-time lattice simulations with dynamical fermions coupled simultaneously to non-Abelian…
Multi-gluon correlations and evidence of saturation from dijet measurements at an Electron Ion Collider
Heikki Mäntysaari, Niklas Mueller, Farid Salazar +1
We study inclusive and diffractive dijet production in electron-proton and electron-nucleus collisions within the Color Glass Condensate effective field theory. We compute dijet cr…
Deeply inelastic scattering structure functions on a hybrid quantum computer
Niklas Mueller, Andrey Tarasov, Raju Venugopalan
We outline a strategy to compute deeply inelastic scattering structure functions using a hybrid quantum computer. Our approach takes advantage of the representation of the fermion…
String-breaking statics and dynamics in a (1+1)D SU(2) lattice gauge theory
Navya Gupta, Emil Mathew, Saurabh V. Kadam +5
String breaking is at the core of hadronization models of relevance to particle colliders. Yet, studies of string-breaking dynamics rooted in quantum chromodynamics remain fundamen…
World-line construction of a covariant chiral kinetic theory
Niklas Mueller, Raju Venugopalan
We discuss a novel world-line framework for computations of the Chiral Magnetic Effect (CME) in ultrarelativistic heavy-ion collisions. Starting from the fermion determinant in the…
High-Energy Collision of Quarks and Mesons in the Schwinger Model: From Tensor Networks to Circuit QED
Ron Belyansky, Seth Whitsitt, Niklas Mueller +4
With the aim of studying nonperturbative out-of-equilibrium dynamics of high-energy particle collisions on quantum simulators, we investigate the scattering dynamics of lattice qua…
Quantum thermodynamics of nonequilibrium processes in lattice gauge theories
Zohreh Davoudi, Christopher Jarzynski, Niklas Mueller +3
A key objective in nuclear and high-energy physics is to describe nonequilibrium dynamics of matter, e.g., in the early universe and in particle colliders, starting from the Standa…
Thermalization of Gauge Theories from their Entanglement Spectrum
Niklas Mueller, Torsten V. Zache, Robert Ott
Using dual theories embedded into a larger unphysical Hilbert space along entanglement cuts, we study the Entanglement Structure of lattice gauge theory in s…
Non-equilibrium study of the Chiral Magnetic Effect from real-time simulations with dynamical fermions
Mark Mace, Niklas Mueller, Sören Schlichting +1
We present a real-time lattice approach to study the non-equilibrium dynamics of vector and axial charges in gauge theories. Based on a classical description of…
Quantum Computing Universal Thermalization Dynamics in a (2+1)D Lattice Gauge Theory
Niklas Mueller, Tianyi Wang, Or Katz +2
Simulating non-equilibrium phenomena in strongly-interacting quantum many-body systems, including thermalization, is a promising application of near-term and future quantum computa…
Computing real time correlation functions on a hybrid classical/quantum computer
Niklas Mueller, Andrey Tarasov, Raju Venugopalan
Quantum devices may overcome limitations of classical computers in studies of nuclear structure functions and parton Wigner distributions of protons and nuclei. In this talk, we di…
Work and heat exchanged during sudden quenches of strongly coupled quantum systems
Zohreh Davoudi, Christopher Jarzynski, Niklas Mueller +3
How should one define thermodynamic quantities (internal energy, work, heat, etc.) for quantum systems coupled to their environments strongly? We examine three (classically equival…
Executive Voiced Laughter and Social Approval: An Explorative Machine Learning Study
Niklas Mueller, Steffen Klug, Andreas Koenig +4
We study voiced laughter in executive communication and its effect on social approval. Integrating research on laughter, affect-as-information, and infomediaries' social evaluation…
Randomized measurement protocols for lattice gauge theories
Jacob Bringewatt, Jonathan Kunjummen, Niklas Mueller
Randomized measurement protocols, including classical shadows, entanglement tomography, and randomized benchmarking are powerful techniques to estimate observables, perform state t…
Diffractive dijet production from the Color Glass Condensate and the small- gluon distributions
Heikki Mäntysaari, Niklas Mueller, Björn Schenke
We study exclusive dijet production in electron-proton deep inelastic scattering at a future Electron Ion Collider. We predict the elliptic modulation of the cross section as a fun…
Quantum simulation of out-of-equilibrium dynamics in gauge theories
Jad C. Halimeh, Niklas Mueller, Johannes Knolle +2
Recent advances in quantum technologies have enabled quantum simulation of gauge theories -- some of the most fundamental frameworks of nature -- in regimes far from equilibrium, w…
The chiral anomaly, Berry's phase and chiral kinetic theory, from world-lines in quantum field theory
Niklas Mueller, Raju Venugopalan
We outline a novel chiral kinetic theory framework for systematic computations of the Chiral Magnetic Effect (CME) in ultrarelativistic heavy-ion collisions. The real part of the f…
Quantum Information Science and Technology for Nuclear Physics. Input into U.S. Long-Range Planning, 2023
Douglas Beck, Joseph Carlson, Zohreh Davoudi +98
In preparation for the 2023 NSAC Long Range Plan (LRP), members of the Nuclear Science community gathered to discuss the current state of, and plans for further leveraging opportun…
Non-cancellation of the parity anomaly in the strong-field regime of QED
Robert Ott, Torsten V. Zache, Niklas Mueller +1
Quantum fluctuations lead to an anomalous violation of parity symmetry in quantum electrodynamics for an even number of spatial dimensions. While the leading parity-odd electric cu…
Dynamical quark mass generation in a strong external magnetic field
Niklas Mueller, Jacqueline A. Bonnet, Christian S. Fischer
We investigate the effect of a strong magnetic field on dynamical chiral symmetry breaking in quenched and unquenched QCD. To this end we apply the Ritus formalism to the coupled s…
Quantum thermalization of gauge theories: chaos, turbulence and universality
Niklas Mueller, Torsten V. Zache, Robert Ott
In this talk, we discuss real-time thermalization dynamics of Lattice Gauge Theory in 2+1 spacetime dimensions. While classical thermalization is commonly associated…
Constructing phase space distributions with internal symmetries
Niklas Mueller, Raju Venugopalan
We discuss an ab initio world-line approach to constructing phase space distributions in systems with internal symmetries. Starting from the Schwinger-Keldysh real time path integr…
QCD Resummation in Hard Diffractive Dijet Production at the Electron-Ion Collider
Yoshitaka Hatta, Niklas Mueller, Takahiro Ueda +1
Diffractive dijet production at the electron-ion collider (EIC) has been proposed to study the gluon Wigner distribution at small-. We investigate the soft gluon radiation assoc…
World-line formulation of chiral kinetic theory in topological background gauge fields
Niklas Mueller, Raju Venugopalan
In heavy-ion collisions, an interesting question of phenomenological relevance is how the chiral imbalance generated at early times persists through a fluctuating background of sph…
Stabilizer Scars
Jeremy Hartse, Lukasz Fidkowski, Niklas Mueller
Quantum many-body scars are eigenstates in non-integrable isolated quantum systems that defy typical thermalization paradigms, violating the eigenstate thermalization hypothesis an…