Theoretical progress in the research of photoinduced phase transitions is reviewed with
closely related experiments. After a brief introduction of stochastic evolution in statistical …

Photoinduced melting of horizontal-stripe charge orders in quasi-two-dimensional organic
conductors θ-(BEDT-TTF) 2 RbZn (SCN) 4 [BEDT-TTF= bis (ethylenedithio) …

We propose a formulation to obtain the line shape of a magnetic response with dissipative
effects that directly reflects the nature of the environment. Making use of the fact that the time …

accepted October 20, 2005; published January 10, 2006) Theories of photoinduced phase
transitions have developed along with the progress in experimental studies, especially …

We have studied spin excitation spectra in the Shastry-Sutherland model compound Sr Cu 2
(BO 3) 2 in magnetic fields using far-infrared Fourier spectroscopy. The transitions from the …

Relation among various expressions of the complex admittance for quantum systems in
contact with heat reservoir is studied. Exact expressions of the complex admittance are …

We study the dispersion of the magnons (triplet states) in Sr Cu 2 (BO 3) 2 including all
symmetry-allowed Dzyaloshinskii-Moriya interactions [J. Phys. Chem. Solids 4, 241 (1958); …

We theoretically investigate photoresponses of a correlated electron system upon stimuli of
a pulsed laser light. Real-time dynamics of an interacting spinless fermion model on a one …

We study photoinduced phase transitions in linear homocyclic and heterocyclic aromatic
polymers, numerically solving the time-dependent Schrödinger equation and observing the …

We consider the absorption of light with emission of one S tot= 1 magnetic excitation in
systems with a spin gap induced by quantum fluctuations. We argue that an electric-dipole …