Two-Level System with a Noisy Hamiltonian

Hiromichi Nakazato*, Saverio Pascazio

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

10 Citations (Scopus)


We study the dynamical properties of a two-level system in interaction with its environment, whose action on the system is modeled by means of a noise term in the Hamiltonian. We solve the Schrödinger equation, obtain an evolution equation of the Lindblad type for the noise average of the density matrix, and discuss the results in terms of a "decoherence parameter." Finally, we concentrate our attention on the possibility of hindering the transitions between the two levels in two (apparently unrelated) ways: (a) by increasing the strength of the noise; (b) by a series of frequent measurements. There is an interesting relation between these two situations.

Original languageEnglish
Pages (from-to)843-849
Number of pages7
JournalJournal of Superconductivity
Issue number6
Publication statusPublished - 1999
EventProceedings of the 1998 International Workshop on 'Macroscopic Quantum Tunneling and Coherence' - Naples, Italy
Duration: 1998 Jun 101998 Jun 13


  • Decoherence
  • Stochastic
  • Two-level system

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Physics and Astronomy (miscellaneous)


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