A5016663166- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Noncommutative and Quantum Gravity Theories
- Quantum Electrodynamics and Casimir Effect
- Advanced Condensed Matter Physics
- Multiferroics and related materials
- Physics of Superconductivity and Magnetism
- Quantum Chromodynamics and Particle Interactions
- Nonlinear Waves and Solitons
- Particle physics theoretical and experimental studies
- Magnetic Properties and Applications
- Ferroelectric and Piezoelectric Materials
- Magnetic and transport properties of perovskites and related materials
- Organic and Molecular Conductors Research
- Electromagnetic Simulation and Numerical Methods
- Advanced Numerical Methods in Computational Mathematics
Huazhong University of Science and Technology
2020-2025
A bstract In this paper, we derive the Carrollian amplitude in framework of bulk reduction. The is shown to relate scattering by a Fourier transform method. We propose Feynman rules calculate where transforms emerge as integral representation external lines space. Then study four-point at loop level massless Φ 4 theory. As consequence Poincaré invariance, can be transformed that only depends on cross ratio z celestial sphere and variable χ invariant under translation. polynomial two-point...
We reduce the massless scalar field theory in Minkowski spacetime to future null infinity. compute Poincar\'e flux operators, which can be generalized and identified as supertranslation superrotation generators. These generators are shown form a closed symmetry algebra with divergent central charge. In classical limit, we argue that may interpreted geometric of Carrollian manifold, i.e., hypersurface Our method used find more physically interesting theories.
We propose a holographic dictionary which comes from reducing the bulk theories in an asymptotically flat spacetime to its null infinity. A general boundary theory is characterized by fundamental field, infinite tower of descendant fields, constraints among field and descendants, as well symplectic form. For Carrollian diffeomorphisms, we can construct corresponding Hamiltonians are also fluxes bulk, whose quantum operators realize this algebra with divergent central charge. This charge...
We construct Carrollian higher spin field theories by reducing the bosonic Fronsdal in flat spacetime to future null infinity. extend Poincar\'e fluxes quantum flux operators, which generate diffeomorphism, namely supertranslation and superrotation. These operators form a closed symmetry algebra once including helicity operator, follows from superduality transformation. The transformation is an angle-dependent at infinity, generalizes usual electromagnetic duality results agree with lower...
A bstract We construct quantum flux operators with respect to the Poincaré symmetry in massless Dirac theory at future null infinity. An anomalous helicity operator emerges from commutator of superrotation generators. The corresponds local chiral transformation which is analog superduality gauge theories. also find its relation non-closure Lie transport spinor field around a loop. discuss various algebras formed by these and constrain test functions requirement eliminating non-local terms...
A bstract The helicity flux operator is a fascinating quantity that characterizes the angular distribution of radiative photons or gravitons and it has many interesting physical consequences. In this paper, we construct electromagnetic operators which form non-Abelian group in general dimensions, among minimal massless representation little group, finite spin unitary irreducible Poincaré group. As four they generate an extended angle-dependent transformation on Carrollian manifold....
A bstract In this paper, we reduce the electromagnetic theory to future null infinity and obtain a vector at boundary. We compute Poincaré flux operators which could be generalized. quantize theory, impose normal order on extended operators. It is shown that these generate supertranslation superrotation. When work out commutators of operators, find generalized duality operator should included as generators form closed symmetry algebra.
A bstract We reduce the gravitational theory in an asymptotically flat spacetime to future null infinity. compute Poincaré flux operators at infinity and construct supertranslation superrotation generators. The generators are shown form a closed symmetry algebra by including generalized duality operator. could regard all as Hamiltonians with respect transformation boundary field theory. Our construction of may relate BMS fluxes defined literature adding counterterms Bondi mass angular...
A bstract We construct Carrollian scalar field theories in general dimensions, mainly focusing on the boundaries of Minkowski and Rindler spacetime, whose quantum flux operators form a faithful representation diffeomorphism up to central charge, respectively. At future/past null infinity, fluxes are physically observable encode rich information radiation. The charge may be regularized finite by spectral zeta function or heat kernel method unit sphere. For theory at horizon, effective is...
A bstract Carrollian amplitude is the natural object that defines correlator of boundary field theory. In this work, we will elaborate on its proper definition in general dimensions. We use vielbein unit sphere to define fundamental with non-vanishing helicity local Cartesian frame which building block amplitude. dimensions, related momentum space scattering matrix by a modified Fourier transform. The Poincaré transformation law has been discussed. also find an isomorphism between rotation...
The low-dimensional frustrated antiferromagnet system has been an appealing playground for investigating the exotic magnetic ground states. $S=1/2$ skew chain ${\mathrm{Co}}_{2}{\mathrm{V}}_{2}{\mathrm{O}}_{7}$ attracted considerable interest its magnetization plateau and emergent ferroelectricity under high fields. In this work, we report comprehensive angular studies of ferroelectric polarization in fields up to 30 T. was studied detail with applied field rotated within $bc$ $ab$ planes....
A long-standing issue in multiferroic ${\mathrm{MnWO}}_{4}$ is the electric polarization reversal when magnetic field applied along easy axis $(H||u)$. In this work, we performed comprehensive ferroelectric measurements on fields up to 52 T and with rotating direction $ac$ plane. When rotated from $H||c$ $H||u$, induced high-field phase $(\ensuremath{-}P||b)$ favors a sign relative low-field $+P||b$ phase, which attributed vector spin chirality changing one side of connecting other....
Low-dimensional charge density wave (CDW) systems, which undergo successive so-called Peierls phase transitions at characteristic temperatures associated with corresponding changes in electronic structure, are of great importance for exploring novel quantum physics. Here, we report systematic research the magnetotransport properties quasi-two-dimensional CDW conductor $\ensuremath{\eta}\text{\ensuremath{-}}\mathrm{M}{\mathrm{o}}_{4}{\mathrm{O}}_{11}$ under high magnetic fields up to 59 T....
The helicity flux operator is a fascinating quantity that characterizes the angular distribution of radiative photons or gravitons and it has many interesting physical consequences. In this paper, we construct electromagnetic operators which form non-Abelian group in general dimensions, among minimal massless representation little group, finite spin unitary irreducible Poincar\'e group. As four they generate an extended angle-dependent transformation on Carrollian manifold. Interestingly,...
We construct quantum flux operators with respect to the Poincar\'e symmetry in massless Dirac theory at future null infinity. An anomalous helicity operator emerges from commutator of superrotation generators. The corresponds local chiral which is analog superduality gauge theories. also find its relation non-closure Lie transport spinor field around a loop. discuss various algebras formed by these and constrain test functions requirement eliminating non-local terms satisfying Jacobi...
We reduce the gravitational theory in an asymptotically flat spacetime to future null infinity. compute Poincar\'e flux operators at infinity and construct supertranslation superrotation generators. The generators are shown form a closed symmetry algebra by including generalized duality operator. could regard all as Hamiltonians with respect transformation boundary field theory. Our construction of may relate BMS fluxes defined literature adding counterterms Bondi mass angular momentum aspects.
We construct Carrollian scalar field theories in general dimensions, mainly focusing on the boundaries of Minkowski and Rindler spacetime, whose quantum flux operators form a faithful representation diffeomorphism up to central charge, respectively. At future/past null infinity, fluxes are physically observable encode rich information radiation. The charge may be regularized finite by spectral zeta function or heat kernel method unit sphere. For theory at horizon, effective is proportional...
We construct Carrollian higher spin field theories by reducing the bosonic Fronsdal in flat spacetime to future null infinity. extend Poincar\'e fluxes quantum flux operators which generate diffeomorphism, namely supertranslation and superrotation. These form a closed symmetry algebra once including helicity operator follows from super-duality transformation. The transformation is an angle-dependent at infinity generalizes usual electro-magnetic duality results agree with lower cases when...