113 citations · 327 across the 20 of their papers we have counts for
20 papers
Scalable quantum computation of Quantum Electrodynamics beyond one spatial dimension
Zong-Gang Mou, Bipasha Chakraborty
In the Hamiltonian formulation, Quantum Field Theory calculations scale exponentially with spatial volume, making real-time simulations intractable on classical computers and motiv…
Computing real-time quantum path integrals on Sewed, almost-Lefschetz thimbles
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg
We present a method to compute real-time path integrals numerically, by Monte-Carlo sampling on near-Lefschetz thimbles. We present a collection of tools based on the Lefschetz thi…
A singularity problem for interacting massive vectors
Zong-Gang Mou, Hong-Yi Zhang
Interacting massive spin-1 fields have been widely used in cosmology and particle physics. We obtain a new condition on the validity of the classical limit of these theories relate…
Optimisation of Thimble Simulations and Quantum Dynamics of Multiple Fields in Real Time
Simon Woodward, Paul M. Saffin, Zong-Gang Mou +1
We apply the Generalised Thimble approach to the computation of exact path integrals and correlators in real-time quantum field theory. We first investigate the details of the nume…
Dipole Radiation and Beyond from Axion Stars in Electromagnetic Fields
Mustafa A. Amin, Andrew J. Long, Zong-Gang Mou +1
We investigate the production of photons from coherently oscillating, spatially localized clumps of axionic fields (oscillons and axion stars) in the presence of external electroma…
Statistics on Lefschetz thimbles: Bell/Leggett-Garg inequalities and the classical-statistical approximation
Peter Millington, Zong-Gang Mou, Paul M. Saffin +1
Inspired by Lefschetz thimble theory, we treat Quantum Field Theory as a statistical theory with a complex Probability Distribution Function (PDF). Such complex-valued PDFs permit…
Electromagnetic Bursts from Mergers of Oscillons in Axion-like Fields
Mustafa A. Amin, Zong-Gang Mou
We investigate the bursts of electromagnetic and scalar radiation resulting from the collision, and merger of oscillons made from axion-like particles using 3+1 dimensional lattice…
Simulations of a bubble wall interacting with an electroweak plasma
Zong-Gang Mou, Anders Tranberg, Paul M. Saffin
We perform large-scale real-time simulations of a bubble wall sweeping through an out-of-equilibrium plasma. The scenario we have in mind is the electroweak phase transition, which…
Quantum tunnelling, real-time dynamics and Picard-Lefschetz thimbles
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg
We follow up the work, where in light of the Picard-Lefschetz thimble approach, we split up the real-time path integral into two parts: the initial density matrix part which can be…
Real-time quantum dynamics, path integrals and the method of thimbles
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg +1
Direct numerical evaluation of the real-time path integral has a well-known sign problem that makes convergence exponentially slow. One promising remedy is to use Picard-Lefschetz…
Simulations of Cold Electroweak Baryogenesis: Dependence on the source of CP-violation
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg
We compute the baryon asymmetry created in a tachyonic electroweak symmetry breaking transition, focusing on the dependence on the source of effective CP-violation. Earlier simulat…
Simulations of Cold Electroweak Baryogenesis: Quench from portal coupling to new singlet field
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg
We compute the baryon asymmetry generated from Cold Electroweak Baryogenesis, when a dynamical Beyond-the-Standard-Model scalar singlet field triggers the spinodal transition. Usin…
Simulations of Cold Electroweak Baryogenesis: Hypercharge U(1) and the creation of helical magnetic fields
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg
We perform numerical simulations of Cold Electroweak Baryogenesis, including for the first time in the Bosonic sector the full electroweak gauge group SU(2)U(1) and CP-viol…
Simulations of "Tunnelling of the 3rd Kind"
Zong-Gang Mou, Paul M. Saffin, Paul Tognarelli +1
We consider the phenomenon of "tunnelling of the 3rd kind", whereby a magnetic field may traverse a classically impenetrable barrier by pair creation of unimpeded quantum fermions.…
Simulations of Cold Electroweak Baryogenesis: Finding the optimal quench time
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg
We revisit the numerical computation of the baryon asymmetry from Cold Electroweak Baryogenesis given the physical Higgs mass. We investigate the dependence of the asymmetry on the…
Cold Baryogenesis from first principles in the Two-Higgs Doublet model with Fermions
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg
We present a first-principles numerical computation of the baryon asymmetry in electroweak-scale baryogenesis. For the scenario of Cold Baryogenesis, we consider a one fermion-fami…
Structure functions in deep inelastic scattering from gauge/string duality beyond single-hadron final states
Jian-Hua Gao, Zong-Gang Mou
We study deep inelastic scattering at large-'t Hooft coupling and finite from gauge/string duality beyond single-hadron final states which gives the leading large- contrib…
Ensemble fermions for electroweak dynamics and the fermion preheating temperature
Zong-Gang Mou, Paul M. Saffin, Anders Tranberg
We refine the implementation of ensemble fermions for the electroweak sector of the Standard Model, introduced previously. We consider the behavior of different observables as the…
Gravitational Waves from Oscillon Preheating
Shuang-Yong Zhou, Edmund J. Copeland, Richard Easther +3
Oscillons are long-lived, localized excitations of nonlinear scalar fields which may be copiously produced during preheating after inflation, leading to a possible oscillon-dominat…
Polarized Deep Inelastic Scattering Off the "Neutron" From Gauge/String Duality
Jian-Hua Gao, Zong-Gang Mou
We investigate deep inelastic scattering off the polarized "neutron" using gauge/string duality. The "neutron" corresponds to a supergravity mode of the neutral dilatino. Through i…