Dynamic behavior of kink-solitons at junctions in quantum-dot cellular automata

Satoshi Nakagawa, Mikio Eto, Kiyoshi Kawamura

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


We examine the propagation of electric polarization in quantum-dot cellular automata (QCA) as a kink-soliton. Focusing on its behavior at a junction between different kinds of QCA, we solve the time-dependent Schrödinger equation numerically using the Hartree approximation and an exact method. Using the Hartree approximation, the soliton is perfectly transmitted or reflected, like a classical particle. This property agrees with the numerical solution of the nonlinear wave equation obtained in the continuum limit. The exact calculation method yields different behavior patterns for the solitons at the junction, partly transmitted and partly reflected, similar to a quantum wave packet.

Original languageEnglish
Pages (from-to)2046-2049
Number of pages4
JournalJapanese Journal of Applied Physics, Part 2: Letters
Issue number3 B
Publication statusPublished - 2001


  • Kink-soliton
  • Nonlinear wave equation
  • QCA
  • Quantum dot
  • Quantum-dot cellular automata

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


Dive into the research topics of 'Dynamic behavior of kink-solitons at junctions in quantum-dot cellular automata'. Together they form a unique fingerprint.

Cite this