4 papers
cond-mat.mes-hall2009
The hierarchical spectral flow of Bloch electron
Toshifumi Itakura
The Hall conductance of a two-dimensional electron gas has been studied in a uniform magnetic field. The Hall conductivity is expressed as a sum of two contributions: one correspon…
cond-mat.mes-hall2008
Decoherence of one-dimensional electron system
Toshifumi Itakura, Fumitada Itakura
Recently, there have been many attempts to implement quantum computation experimentally. For this purpose, quantum coherence should be maintained during gate operations. Therefore,…
cond-mat.mes-hall2008
The decoherence of coupled spin qubits system
Toshifumi Itakura
In this report, we examine the decoherence of a spin qubits system coupled to counted spin chain with a interaction by using influence functional. We also examine the time…
quant-ph2007
Information Loss of Black Hole
Toshifumi Itakura
This paper has been withdrawn by the author due to a crucial sign error in equation 1.