Construction and applications of the manifestly gauge invariant expressions of the solutions of the cosmological perturbation theory
Sign Up to like & getrecommendations! Published in 2018 at "Annals of Physics"
DOI: 10.1016/j.aop.2018.05.007
Abstract: Abstract After giving how to construct the gauge invariant perturbation variable in an arbitrarily high order and in the arbitrary background spacetime, we consider the manifestly gauge invariant theory of the cosmological perturbations in the… read more here.
Keywords: manifestly gauge; background scalar; time; scalar like ... See more keywords
The spectrum of an SU(3) gauge theory with a fundamental Higgs field
Sign Up to like & getrecommendations! Published in 2018 at "Annals of Physics"
DOI: 10.1016/j.aop.2018.08.018
Abstract: In gauge theories, the physical, experimentally observable spectrum consists only of gauge-invariant states. This spectrum can be different from the elementary spectrum even at weak coupling and in the presence of the Brout-Englert-Higgs effect. We… read more here.
Keywords: gauge; theory; spectrum; gauge invariant ... See more keywords
The gauge-invariant Lagrangian, the Power–Zienau–Woolley picture, and the choices of field momenta in nonrelativistic quantum electrodynamics
Sign Up to like & getrecommendations! Published in 2021 at "Scientific Reports"
DOI: 10.1038/s41598-021-94405-z
Abstract: We show that the Power-Zienau-Woolley picture of the electrodynamics of nonrelativistic neutral particles (atoms) can be derived from a gauge-invariant Lagrangian without making reference to any gauge whatsoever in the process. This equivalence is independent… read more here.
Keywords: woolley picture; field; electrodynamics; gauge invariant ... See more keywords
Gauge invariant variables for cosmological perturbation theory using geometrical clocks
Sign Up to like & getrecommendations! Published in 2018 at "Classical and Quantum Gravity"
DOI: 10.1088/1361-6382/aacda2
Abstract: Using the extended ADM-phase space formulation in the canonical framework we analyze the relationship between various gauge choices made in cosmological perturbation theory and the choice of geometrical clocks in the relational formalism. We show… read more here.
Keywords: gauge; invariant variables; perturbation theory; gauge invariant ... See more keywords
Compactly supported linearised observables in single-field inflation
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2017/07/043
Abstract: We investigate the gauge-invariant observables constructed by smearing the graviton and inflaton fields by compactly supported tensors at linear order in general single-field inflation. These observables correspond to gauge-invariant quantities that can be measured locally.… read more here.
Keywords: gauge invariant; field inflation; single field; compactly supported ... See more keywords
On the gauge-invariant path-integral measure for the overlap Weyl fermions in 16 of SO(10)
Sign Up to like & getrecommendations! Published in 2019 at "Progress of Theoretical and Experimental Physics"
DOI: 10.1093/ptep/ptz115
Abstract: We consider the lattice formulation of SO(10) chiral gauge theory with left-handed Weyl fermions in the 16-dimensional spinor representation ($\underline{16}$) within the framework of the overlap fermion/Ginsparg–Wilson relation. We define a manifestly gauge-invariant path-integral measure… read more here.
Keywords: invariant path; field; measure; gauge invariant ... See more keywords
Variable Planck mass from the gauge invariant flow equation
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.066017
Abstract: Using the gauge invariant flow equation for quantum gravity we compute how the strength of gravity depends on the length or energy scale. The fixed point value of the scale-dependent Planck mass in units of… read more here.
Keywords: invariant flow; mass; gauge invariant; flow equation ... See more keywords
Hamiltonian theory of classical and quantum gauge invariant perturbations in Bianchi I spacetimes
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.123531
Abstract: We derive a Hamiltonian formulation of the theory of gauge invariant, linear perturbations in anisotropic Bianchi I spacetimes, and describe how to quantize this system. The matter content is assumed to be a minimally coupled… read more here.
Keywords: classical quantum; hamiltonian theory; gauge invariant; theory classical ... See more keywords
Gauge-invariant rotor Hamiltonian from dual variables of 3D U(1) gauge theory
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.99.074502
Abstract: We present a tensor formulation for free compact electrodynamics in three Euclidean dimensions and use this formulation to construct a quantum Hamiltonian in the continuous-time limit. Gauge-invariance is maintained at every step and the resulting… read more here.
Keywords: rotor; hamiltonian dual; rotor hamiltonian; gauge invariant ... See more keywords
Distinct Bound of the Quantum Speed Limit via the Gauge Invariant Distance.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.180403
Abstract: We derive a distinct bound of the quantum speed limit for a non-Hermitian quantum system by employing the gauge invariant and geometric natures of quantum mechanics. The bound is of geometric properties since it relates… read more here.
Keywords: quantum speed; distinct bound; bound quantum; gauge invariant ... See more keywords
Pair production processes and flavor in gauge-invariant perturbation theory
Sign Up to like & getrecommendations! Published in 2017 at "Modern Physics Letters A"
DOI: 10.1142/s0217732317502121
Abstract: Gauge-invariant perturbation theory is an extension of ordinary perturbation theory which describes strictly gauge-invariant states in theories with a Brout–Englert–Higgs effect. Such gauge-invariant states are composite operators which have necessarily only global quantum numbers. As… read more here.
Keywords: gauge invariant; invariant perturbation; pair production; perturbation theory ... See more keywords