Coupling between internal spin dynamics and external degrees of freedom in the presence of colored noise Academic Article uri icon

abstract

  • decouple from the transition dynamics and the transition rates between the two levels become symmetric. Numerous quantum systems proposed for applications such as quantum information processing are based on particles trapped in external potentials. A major limitation of these systems is uncontrolled noise-induced transitions between the internal states used for the application (e.g., qubits) or from the latter to other internal states. Typically, different states may experience different potentials, and at times the potential difference is made significant as part of the application itself (e.g., quantum logic gates). As conventional environments usually contain background or technical noise which is not white, it is important to understand the interplay between the internal and external degrees of freedom under these conditions. In this Letter we study the dynamics of transitions between two internal atomic states with different external potentials in the form of two magnetically trapped Zeeman levels (jF; mF i¼j 2; 2i and j2; 1i) in the presence of colored noise which is neither monochromatic nor white. We experimentally observe that the relative transition rates

publication date

  • January 1, 2010