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We use the fractional integrals to describe fractal media. We consider the fractal media as special (“fractional”) continuous media. We discuss the possible experimental testing of the continuous medium model for fractal media that is suggested in (Phys. Lett. A 336 (2005) 167). This test is...
Solid-state dye-doped polymer is an attractive alternative to the conventional liquid dye solution. In this Letter the spectral characteristics and the nonlinear optical properties of the dye acridine orange are studied. The nonlinear refractive index of the dye in n-butyl acetate (nBA) and...
New exact solutions of the well-known ( 2 + 1 )-dimensional sine-Gordon system are studied by introducing the modified mapping relations between the cubic nonlinear Klein–Gordon and sine-Gordon equations. Two arbitrary functions are included into the Jacobi elliptic function solutions. By...
We study the interaction of two time-dependent signal beams and two stationary control beams with a double- Λ atomic configuration. Because of the quantum coherence between the two lower atomic levels existing in electromagnetically induced transparency (EIT), the two signal beams are shape...
We proposed a scheme on secret sharing of quantum information based on entanglement swapping in cavity QED. In our scheme, the effects of cavity decay and thermal field are all eliminated.
The eavesdropping scheme proposed by Wójcik (Phys. Rev. Lett. 90 (2003) 157901) on the ping-pong protocol (Phys. Rev. Lett. 89 (2002) 187902) is improved by constituting a new set of attack operations. The improved scheme has a zero eavesdropping-induced channel loss and produces perfect...
We discuss some recently proposed methods that yield operator solutions free from secular terms for the quantum-mechanical anharmonic oscillators. The frequency operators obtained in those methods are not same. In the present work we show that the apparent differences between the frequency...
A quantum master equation has been derived recently by Esposito and Gaspard (Phys. Rev. E 68 (2003) 066112) to study the dynamics of a quantum subsystem weakly interacting with another system which has a dense spectrum. This equation takes into account the fact that, because of energy...
The present Letter provides the sufficient condition for avoiding amplitude death in two identical nonlinear systems coupled by a delay diffusive connection. This condition is that if a Jacobi matrix at a fixed point in an isolated system has an odd number of real positive eigenvalues, then the...
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