High-Contrast Interference of Ultracold Fermions
| Autor: | Vincent M. Klinkhamer, Ralf Klemt, Jan Hendrik Becher, Philipp M. Preiss, Selim Jochim, Andrea Bergschneider, Nicolò Defenu |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Quantum Physics Particle number FOS: Physical sciences General Physics and Astronomy Fermion Interference (wave propagation) 01 natural sciences Measure (mathematics) Momentum Optical tweezers Quantum Gases (cond-mat.quant-gas) Quantum mechanics 0103 physical sciences Quantum Physics (quant-ph) Condensed Matter - Quantum Gases 010306 general physics Quantum statistical mechanics Identical particles |
| Zdroj: | Physical Review Letters |
| ISSN: | 1079-7114 |
| Popis: | Many-body interference between indistinguishable particles can give rise to strong correlations rooted in quantum statistics. We study such Hanbury Brown--Twiss-type correlations for number states of ultracold massive fermions. Using deterministically prepared $^{6}\mathrm{Li}$ atoms in optical tweezers, we measure momentum correlations using a single-atom sensitive time-of-flight imaging scheme. The experiment combines on-demand state preparation of highly indistinguishable particles with high-fidelity detection, giving access to two- and three-body correlations in fields of fixed fermionic particle number. We find that pairs of atoms interfere with a contrast close to 80%. We show that second-order density correlations arise from contributions from all two-particle pairs and detect intrinsic third-order correlations. |
| Databáze: | OpenAIRE |
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