High-contrast interference of ultracold fermions

• Verfasst von: Preiss, Philipp [VerfasserIn]
• Verfasst von: Becher, Jan-Hendrik [VerfasserIn]
• Verfasst von: Klemt, Ralf [VerfasserIn]
• Verfasst von: Klinkhamer, Vincent M. [VerfasserIn]
• Verfasst von: Bergschneider, Andrea [VerfasserIn]
• Verfasst von: Defenu, Nicolò [VerfasserIn]
• Verfasst von: Jochim, Selim [VerfasserIn]
• Titel: High-contrast interference of ultracold fermions
• Verf.angabe: Philipp M. Preiss, Jan Hendrik Becher, Ralf Klemt, Vincent Klinkhamer, Andrea Bergschneider, Nicolò Defenu, and Selim Jochim
• E-Jahr: 2019
• Jahr: 12 April 2019
• Umfang: 6 S.
• Fussnoten: Gesehen am 20.05.2019
• Titel Quelle: Enthalten in: Physical review letters
• Ort Quelle: College Park, Md. : APS, 1958
• Jahr Quelle: 2019
• Band/Heft Quelle: 122(2019,14) Artikel-Nummer 143602, 6 Seiten
• ISSN Quelle: 1079-7114
• DOI: doi:10.1103/PhysRevLett.122.143602
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 166592232X

Abstract

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 6Li 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.