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Time evolution of quantum fractals
Wojcik1, Bialynicki-Birula, Zyczkowski
1Centrum Fizyki Teoretycznej, Polska Akademia Nauk, Al. Lotnikow 32/46, 02-668 Warszawa, Poland and College of Science (Szkola Nauk Scislych), Al. Lotnikow 32/46, 02-668 Warszawa, Poland.
Physical Review Letters
|December 2, 2000
Abstract:
We propose a general construction of wave functions of arbitrary prescribed fractal dimension, for a wide class of quantum problems, including the infinite potential well, harmonic oscillator, linear potential, and free particle. The box-counting dimension of the probability density P(t)(x) = |Psi(x,t)|(2) is shown not to change during the time evolution. We prove a universal relation D(t) = 1+Dx/2 linking the dimensions of space cross sections Dx and time cross sections D(t) of the fractal quantum carpets.