We show that a modified form of the semiclassical coupled wave theory gives a reliable description of wave propagation in a 1D photonic crystal with complex refractive index. The key idea of the theory remains the same: to include both variable amplitudes and variable (geometric-optics) phases in the counterpropagating coupled waves within the photonic crystal. Here, however, the phases become ...

We develop a quantum theory of near-field electrodynamical properties of carbon nanotubes and investigate spontaneous decay dynamics of excited states and van der Waals attraction of the ground state of an atomic system close to a single-wall nanotube surface. Atomic spontaneous decay exhibits vacuum-field Rabi oscillations – a principal signature of strong atomvacuum-field coupling. The strong...

The time and space resolved dynamics of a qubit with an Ohmic coupling to propagating 1D photons is studied, from weak coupling to the ultrastrong coupling regime. A nonperturbative study based on matrix product states shows the following results, (i) The ground state of the combined systems contains excitations of both the qubit and the surrounding bosonic field. (ii) An initially excited qubi...

The indirect scalar NMR spin-spin coupling constants across the H-bonds of the protein ubiquitin were calculated, including the Fermi contact, the diamagnetic spin-orbit, the paramagnetic spin-orbit, and the spin dipole term, employing coupled perturbed density functional theory in combination with the B3LYP functional and different basis sets: (9s,5p,1d/5s,1p)[6s,4p,1d/3s,1p] and (11s,7p,2d/5s...

A 1D/3D Finite-Volume coupling is proposed for the Euler/Homogeneous Equilibrium Model equations. The present approach based on framework making it possible to tackle general equations of state . special attention given conservation mass , momentum and energy at common interface. For fluid–structure interaction induced by fast-transient phenomena occurring in pipelines, fluid also associated wi...

Many diffusion-ordered spectroscopy (DOSY) NMR techniques have recently been developed to aid in the deconvolution of complex mixtures. Spectroscopic separation based on chemical and physical properties facilitates the identification of mixture components while eliminating time-consuming separation steps and preserving the chemical environment. One way to improve resolution in such experiments ...

The coupling of phonons with collective modes and single-particle gap excitations associated with one (1d) and two-directional (2d) electronically-driven charge-density wave (CDW) ordering in metallic RTe3 is investigated as a function of rare-earth ion chemical pressure (R=Tb, Dy, Ho) using femtosecond pump-probe spectroscopy. From the T -dependence of the CDW gap ∆CDW and the amplitude mode (...

A new 1D chained Ca(II) coordination polymer—namely, [CaL2(H2O)2]n (HL = 3,5-bis(4-pyridylmethoxy)benzoic acid)—was synthesized though the reaction of Ca(ClO4)2·4H2O, 3,5-bis(4-pyridylmethoxy)benzoic acid and NaOH in H2O/CH3CH2OH (v:v = 1:2) solution. Its structure was determined by elemental analysis, infrared spectrum, and single-crystal XRD. Structural analyses show that each Ca(II) ion is e...

Six copper(i) halide clusters based upon ferrocenyltelluroethers or ferrocenylselenoethers, 1-6, have been synthesized and structurally characterized by an X-ray crystallographic study. These structures include a discrete step-cubane Cu4I4 cluster, a 1D chain with rhomboid Cu2X2 clusters, a 1D chain with cubane Cu4I4 clusters and a 2D network with Cu2I2 clusters. 1-3 are the first structurally ...

Magnetic excitations of the quasi-1D S = 1/2 Heisenberg antiferromagnet (HAF) Cs2CuCl4 have been measured as a function of magnetic field using neutron scattering. For T < 0.62 K and B=0 T the weak inter-chain coupling produces 3D incommensurate ordering. Fields greater than BC =1.66 T, but less than the field ( ≃ 8 T) required to fully align the spins, are observed to decouple the chains, and ...