1. Measuring quantum coherence in bulk solids using dual phase-locked optical pulses
- Author
-
Keigo Kato, Katsura Norimatsu, Shingo Hayashi, Masaki Hada, Kazutaka G. Nakamura, and Yosuke Kayanuma
- Subjects
Imagination ,Coherence time ,Interferometric visibility ,Multidisciplinary ,Information retrieval ,Materials science ,Condensed matter physics ,Phonon ,media_common.quotation_subject ,Condensed Matter::Mesoscopic Systems and Quantum Hall Effect ,Article ,Coherence length ,Condensed Matter::Materials Science ,Picosecond ,Condensed Matter::Superconductivity ,Condensed Matter::Strongly Correlated Electrons ,Quantum ,Coherence (physics) ,media_common - Abstract
Electronic and phonon coherence are usually measured in different ways because their time-scales are very different. In this paper we simultaneously measure the electronic and phonon coherence using the interference of the electron-phonon correlated states induced by two phase-locked optical pulses. Interferometric visibility showed that electronic coherence remained in a semiconducting GaAs crystal until ~40 fs; in contrast, electronic coherence disappeared within 10 fs in a semimetallic Bi crystal at room temperature, differing substantially from the long damping time of its phonon coherence, in the picosecond range.
- Published
- 2014