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- Title
Local detection of quantum correlations with a single trapped ion.
- Authors
Gessner, M.; Ramm, M.; Pruttivarasin, T.; Buchleitner, A.; Breuer, H-P.; Häffner, H.
- Abstract
Quantum correlations are at the heart of quantum information science. Their detection usually requires access to all the correlated subsystems. However, in many realistic scenarios this is not feasible, as only some of the subsystems can be controlled and measured. Such cases can be treated as open quantum systems interacting with an inaccessible environment. Initial system-environment correlations play a fundamental role for the dynamics of open quantum systems. Following a recent proposal, we exploit the impact of the correlations on the open-system dynamics to detect system-environment quantum correlations without accessing the environment. We use two degrees of freedom of a trapped ion to model an open system and its environment. The present method does not require any assumptions about the environment, the interaction or the initial state, and therefore provides a versatile tool for the study of quantum systems.
- Subjects
QUANTUM correlations; PAIRING correlations (Nuclear physics); ION traps; QUADRUPOLE ion trap mass spectrometry; PHASE equilibrium; DEGREES of freedom; MATHEMATICAL models
- Publication
Nature Physics, 2014, Vol 10, Issue 2, p105
- ISSN
1745-2473
- Publication type
Article
- DOI
10.1038/nphys2829