Nonlinear formulation of slow Alfvén wave in magnetized plasma which can be an essential ingredient of the solar space plasma is being studied. Various method has been adopted, mathematical formulation of the magnetohydrodynamic (MHD) waves can interpret the astrophysical phenomena happening in space plasma. The mathematical formulation of slow Alfvén wave and kinetic Alfvén wave (KAW) has been done from Maxwell equation as a make model equation. On the perturbation of slow Alfvén wave by pumped wave, the coupled wave dynamics has studied and their numerical simulation has been performed at theta =50 degree. Several localized filamentary structures have observed with diverse intensities. The spectra associated with magnetic field fluctuations are also observed with Kolmogorov scaling for inertial and dispersive range spectral index which are proportional to k-5/3 and k-3 respectively.
Semiclassical trajectory-based methods can now explain mesoscopic effects (shot-noise, conductance fluctuations, etc) in clean chaotic systems, such as chaotic quantum dots. In the deep classical limit (wavelength much less than system size) the Ehrenfest time (the time for a wavepacket to spread to a classical size) plays a crucial role, and random matrix theory (RMT) ceases to be applicable to the transport properties of open chaotic systems. Here we summarize some of our recent results for shot-noise (intrinsically quantum noise in the current through the system) in this deep classical limit. For systems with perfect coupling to the leads, we use a phase-space basis on the leads to show that the transmission eigenvalues are all 0 or 1-so transmission is noiseless [Whitney-Jacquod, Phys. Rev. Lett. 94, 116801 (2005), Jacquod-Whitney, Phys. Rev. B 73, 195115 (2006)]. For systems with tunnel-barriers on the leads we use trajectory-based semiclassics to extract universal (but non-RMT) shot-noise results for the classical regime [Whitney, cond-mat/0612122].
This is a note associated with my paper "From Quantum Dynamics to the Canonical Distribution: A Rigorous Derivation in Special Models" (cond-mat/9707253). Here I describe all the technical details which are not discussed in the main paper.
The present paper is an extension of 'cond-mat/0312673'. The construction of a hybrid discrete-continuous model of layered superconductors is presented. The model bases on the classic Lawrence-Doniach scenario with admitting, however, long-range interactions between atomic planes. Moreover, apart from Josephson couplings they involve the proximity effects. The range of interactions can, in principle, be arbitrary large. The solutions corresponding to the range K=2 are found. The mechanism of enhancement of superconductivity caused by the proximity effect and the presence of higher Josephson couplings is shown. The physical meaning of coupling constants, with particular attention paid to their sign, is discussed. For the case K=2 the interpretation in terms of microscopic interactions between Cooper pairs in different planes, as well as the relation to experimentally measurable quantities, such as the out-of-plane effective mass and bandwidth, is given.
Here we present some details of the self-consistent procedure of the photoemission spectra analysis suggested in [Phys. Rev. B 71, 214513 (2005); cond-mat/0405696; cond-mat/0409483] and answer some of the most frequently asked questions concerning this analysis.
In Phys. Rev. Lett. 89, 180401 (2002) [cond-mat/0204504], Kokkelmans and Holland interpret the results of a recent experiment at JILA that demonstrated atom-molecule coherence in a Bose-Einstein condensate. Using a mean-field approximation to a resonance field theory involving an atom condensate and a molecular condensate, they find that the molecular condensate is tiny compared to the atom condensate. We show that if the probability for the molecular field to create a diatomic molecule is correctly included, the numbers of atoms in the atom condensate and in the condensate of diatomic molecules are comparable.
We reply to the comment of Marinari and Parisi [cond-mat/0002457 v2] on our paper [Phys. Rev. Lett. 83, 5126 (1999) and cond-mat/9906323]. We show that the data in the comment are affected by strong finite-size corrections. Therefore the original conclusion of our paper still stands.
This note summarizes some recently published results, that are reported in cond-mat today. Its aim is twofold. First, I believe that it is worthwhile to clarify the theoretical interpretation of a series of x-ray scattering experimental results, whose implications are apparently not well-known in the recent literature. A comment about K edge linear dichroism experiments is also provided. In second place, I would like to add a personal opinion about the role of non-local correlations in the insulating ground-state of V$_2$O$_3$.
We offer o reply for the comments of Rapisarda et al. cond-mat/0601409 on our letter "Entropy of Classical Systems with Long Range Interactios", published in Phys. Rev. Lett. Vol 95 (2005) 190601.