When a flat wave enters the medium along the z-axis so that at t = 0 the initial wave vector
is everywhere equal to k(0) = [k.
9 (14), at a single setting of the spectrometer centered at a wave vector
of (1/4,1/4, 0) and energy transfer of 10 meV.
We measured the wave vector
and damping coefficient at the frequency between 50 and 1000 Hz.
0] is the total number of charged sound particles at the condensate level with the wave vector
where [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] is the average number of Bose quasiparticles with spin 1 with the wave vector
k at the temperature T:
64, -1 >) values of angles between directions of main T wave and R wave vectors
were determined according to Kardys et al.
t] are the unknown constants which are found as below; [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] are, respectively, the Bose vector-operators of creation and annihilation of electric fields of one ion-wave particle with wave vector
0,t] is the total number of Sound Particles in the condensate level with wave vector
Each Fourier transform F(Q) equals the volume integral  of the respective [rho](r)exp(-iQ * r), Q denoting the wave vector
is the density operator of the electron modes with wave vector
Conservation of the tangential component of the neutron wave vector
across the interface yields the exact phase
For our interference simulations in the plane wave theory, we extended our previous program  prepared with the decomposition of the wave vector
to the parallel and the perpendicular components to the sample surface.