95 citations · 209 across the 14 of their papers we have counts for
15 papers
New class of quantum transitions exhibiting large-scale intercorrelations: Color of the sky
Kenzo Ishikawa, Masaki Takesada
The absolute value of the transition probability of the Rayleigh scattering is computed for the first time and applied to the scattering of solar light with molecules in the atmosp…
B-H hysteresis in itinerant Feromagnetism from Chern-Simons Gauge theory
Kenzo Ishikawa
The log H term is derived in the free energy of many-electron system from Chern-Simons gauge theory. Owing to the singularity at , this leads the first order transition and B-…
Wave Packet Sizes in Quantum Mechanical Scatterings: New Perspective
Kenzo Ishikawa, Osamu Jinnouchi
Particles exist with a probability of 1 and are represented by wave packets in quantum mechanics. These wave packets satisfy the Schrödinger equation and are classified as either b…
Overlap integral of stationary scattering states
Kenzo Ishikawa, Yuya Nishio
The overlap integrals of scattering states in potentials of finite widths are expressed with their asymptotic behaviors and those of energies and consist of diagonal te…
Magnetization without spin: effective Lagrangian of itinerant electrons
Kenzo Ishikawa
Effective Lagrangian of itinerant electron system of finite density at finite magnetic field is found to include Chern-Simons term of electromagnetic potentials of lower scale dime…
Energy Spectrum for Neutral Collective Excitations in Striped Hall States
N. Maeda, T. Aoyama, Y. Ishizuka +1
Neutral collective excitations in the striped Hall state are studied by using the single mode approximation and Hartree-Fock approximation at the half-filled third and fourth Landa…
Neutral Collective Excitations in Striped Hall States
N. Maeda, T. Aoyama, Y. Ishizuka +1
In the striped Hall state, a magnetic translation in one direction is spontaneously broken to the discrete translation. The spectrum of the neutral collective excitation is obtaine…
Energy Spectrum of Neutral Collective Excitations in Striped Hall States
T. Aoyama, K. Ishikawa, Y. Ishizuka +1
We investigate neutral collective excitations in the striped Hall state. In the striped Hall state, the magnetic translation and rotation symmetries are spontaneously broken. Using…
Optimal orientation of striped states in the quantum Hall system against external modulations
T. Aoyama, K. Ishikawa, N. Maeda
We study striped states in the quantum Hall system around half-filled high Landau levels and obtain the optimal orientation of the striped state in the presence of an external unid…
Observation of Induced Chern-Simons Term in P- and T- violating Superconductors
J. Goryo, K. Ishikawa
We show in this letter that P- and T-odd terms of the electromagnetic potentials (P; parity, T; time reversal) are induced and lead an unusual phenomenon in P- and T-violating supe…
Field Theory on the von Neumann Lattice and the Quantized Hall Conductance of Bloch Electrons
K. Ishikawa, N. Maeda, T. Ochiai +1
We construct useful sets of one-particle states in the quantum Hall system based on the von Neumann lattice. Using the set of momentum states, we develop a field-theoretical formal…
E-B Mixing in T-violating Superconductors
J. Goryo, K. Ishikawa
We analyze time reversal violating processes of the p-wave superconductor. The Landau-Ginzuburg effective action has an induced T-violating term of electromagnetic potentials which…
Abelian Chern-Simons Term in Superfluid 3He-A
J. Goryo, K. Ishikawa
We show in this paper that Abelian Chern-Simons term is induced in 2+1 and 3+1 dimensional rotating superfluid He-A and plays important roles in its dynamics. Because U(1) sy…
Duality Relation among Periodic Potential Problems in the Lowest Landau Level
K. Ishikawa, N. Maeda, T. Ochiai +1
Using a momentum representation of a magnetic von Neumann lattice, we study a two-dimensional electron in a uniform magnetic field and obtain one-particle spectra of various period…
Integer Quantum Hall Effect with Realistic Boundary Condition : Exact Quantization and Breakdown
K. Ishikawa, N. Maeda, K. Tadaki
A theory of integer quantum Hall effect(QHE) in realistic systems based on von Neumann lattice is presented. We show that the momentum representation is quite useful and that the q…