Local probe of single phonon dynamics in warm ion crystals
| Autor: | Heinz-Peter Breuer, Thaned Pruttivarasin, Philipp Schindler, Ahmed Abdelrahman, R. Masuda, Dylan J Gorman, Andreas Buchleitner, Manuel Gessner, Hartmut Häffner, O. Khosravani, Michael Ramm |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Quantum Physics Quantum discord Multidisciplinary Condensed matter physics Phonon Science General Physics and Astronomy FOS: Physical sciences Observable General Chemistry 01 natural sciences Molecular physics Article General Biochemistry Genetics and Molecular Biology 010305 fluids & plasmas Ion 0103 physical sciences 010306 general physics Quantum Physics (quant-ph) Quantum Excitation Quantum computer Coherence (physics) |
| Zdroj: | Nature Communications, Vol 8, Iss 1, Pp 1-5 (2017) Nature communications, vol 8, iss 1 Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | The detailed characterization of non-trivial coherence properties of composite quantum systems of increasing size is an indispensable prerequisite for scalable quantum computation, as well as for understanding of nonequilibrium many-body physics. Here we show how autocorrelation functions in an interacting system of phonons as well as the quantum discord between distinct degrees of freedoms can be extracted from a small controllable part of the system. As a benchmark, we show this in chains of up to 42 trapped ions, by tracing a single phonon excitation through interferometric measurements of only a single ion in the chain. We observe the spreading and partial refocusing of the excitation in the chain, even on a background of thermal excitations. We further show how this local observable reflects the dynamical evolution of quantum discord between the electronic state and the vibrational degrees of freedom of the probe ion. Comment: 22 pages, 4 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|