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Unfolding multi-particle quantum correlations hidden in decoherence
- Publication Year :
- 2017
-
Abstract
- Quantum coherence is a fundamental characteristic to distinguish quantum systems from their classical counterparts. Though quantum coherence persists in isolated non-interacting systems, interactions inevitably lead to decoherence, which is in general believed to cause the lost of quantum correlations. Here, we show that, accompanying to the single-particle decoherence, interactions build up quantum correlations on the two-, three-, and multi-particle levels. Using the quantitative solutions of the quantum dynamics of a condensate occupying two modes, such as two bands of an optical lattice, we find out that such dynamically emergent multi-particle correlations not only reveal how interactions control the quantum coherence of a many-body system in a highly intriguing means, but also evince the rise of exotic fragmented condensates, which are difficult to access at the ground state. We further develop a generic interferometry that can be used in experiments to measure high order correlation functions directly.<br />Comment: 11 pages, 6 figures
- Subjects :
- Condensed Matter - Quantum Gases
Subjects
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.1711.04105
- Document Type :
- Working Paper