Collisional decoherence of a tracer particle moving in one dimension | Macquarie University ResearchOnline

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Title: Collisional decoherence of a tracer particle moving in one dimension
Related: Physical review A. Atomic, molecular, and optical physics, Vol. 82, Issue 5 (2010), p.052104-1-052104-9
DOI: 10.1103/PhysRevA.82.052104
Publisher: American Physical Society
Date: 2010
FoR/RFCD Code(s): 020200 Atomic, Molecular, Nuclear, Particle and Plasma Physics 020500 Optical Physics 020400 Condensed Matter Physics
Author/Creator: Kamleitner, Ingo
Description: We study decoherence of the external degree of freedom of a tracer particle moving in a one dimensional dilute Boltzmann gas. We find that phase averaging is the dominant decoherence effect, rather than information exchange between tracer and gas particles. While a coherent superposition of two wave packets with different mean positions quickly turns into a mixed state, it is demonstrated that such superpositions of different momenta are robust to phase averaging, until the two wave packets acquire a different position due to the different velocity of each wave packet.
Description: 9 page(s)
Subject Keyword: 020200 Atomic, Molecular, Nuclear, Particle and Plasma Physics
Subject Keyword: 020500 Optical Physics
Subject Keyword: 020400 Condensed Matter Physics
Resource Type: journal article
Organisation: Macquarie University. Dept. of Physics and Astronomy

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