Results 21 to 30 of about 4,144,436 (328)
Identification of Physical Parameters of a Porous Material Located in a Duct by Inverse Methods
Archives of Acoustics, 2021 Lined ducts with porous materials are found in many industrial applications. To understand and simulate the acoustic behaviour of these kinds of materials, their intrinsic physical parameters must be identified.
Marwa KANI +4 more
doaj +1 more source
Real-time microwave imaging of unknown anomalies via scattering matrix [PDF]
Mechanical systems and signal processing, 2018 We consider an inverse scattering problem to identify the locations or shapes of unknown anomalies from scattering parameter data collected by a small number of dipole antennas.
W. Park
semanticscholar +1 more source
Classical observables from the exponential representation of the gravitational S-matrix [PDF]
Journal of High Energy Physics, 2023 By combining the KMOC-formalism with the exponential representation of the scattering matrix we show that the two-body scattering angle is given by the corresponding matrix element of the exponential representation.
P. Damgaard +3 more
semanticscholar +1 more source
Relative entropy in scattering and the S-matrix bootstrap [PDF]
, 2020 We consider entanglement measures in 2-2 scattering in quantum field theories, focusing on relative entropy which distinguishes two different density matrices.
A. Bose +4 more
semanticscholar +1 more source
The phase of the scattering matrix [PDF]
Physics Letters B, 2000 Vacuum polarization in external fields is treated by way of calculating - exactly and then perturbatively - the phase of the quantum scattering matrix in the Shale-Stinespring approach to field theory. The link between the Shale-Stinespring method and the Epstein-Glaser renormalization procedure is highlighted.
openaire +2 more sources
D=11 SUGRA as the Low Energy Effective Action of Matrix Theory: Three Form Scattering [PDF]
, 1998 We employ the LSZ reduction formula for Matrix Theory introduced in our earlier work to compute the t-pole S-matrix for three form-three form scattering. The result agrees completely with tree level D=11 SUGRA.
Plefka, Jan +2 more
core +10 more sources
The scattering matrix with respect to an Hermitian matrix of a graph
Discrete Mathematics, 2022 21 pages.
Takashi Komatsu, Norio Konno, Iwao Sato
openaire +3 more sources
On the imaginary part of coupling resonance points [PDF]
Opuscula Mathematica, 2019 We prove for rank one perturbations that the imaginary part of a coupling resonance point is inversely proportional by a factor of \(-2\) to the rate of change of the scattering phase, as a function of the coupling variable, evaluated at the real part of
Nurulla Azamov, Tom Daniels
doaj +1 more source
Singularities of Scattering Matrices
Universe, 2023 Our main result is the analysis of singularities of the integrands of integrals representing the matrix elements of the scattering matrix and the inclusive scattering matrix in perturbation theory. These results are proven for any quantum field theory in
Albert Schwarz
doaj +1 more source
Quasinormal-Mode Expansion of the Scattering Matrix [PDF]
, 2016 It is well known that the quasinormal modes (or resonant states) of photonic structures can be associated with the poles of the scattering matrix of the system in the complex-frequency plane. In this work, the inverse problem, i.e., the reconstruction of
F. Alpeggiani +3 more
semanticscholar +1 more source