Probing spin correlations in a Bose-Einstein condensate near the single atom level
| Autor: | Bertrand Evrard, An Qu, Jean Dalibard, Fabrice Gerbier |
|---|---|
| Přispěvatelé: | Chaire Atomes et rayonnement, Laboratoire Kastler Brossel (LKB [Collège de France]), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Collège de France (CdF (institution))-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Collège de France (CdF (institution)) |
| Rok vydání: | 2020 |
| Předmět: |
[PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas]
Vacuum state General Physics and Astronomy FOS: Physical sciences 01 natural sciences Resonance (particle physics) law.invention symbols.namesake [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph] law 0103 physical sciences Atom 010306 general physics Wave function Quantum fluctuation Spin-½ Physics Condensed Matter::Quantum Gases Quantum Physics Zeeman effect Quantum Gases (cond-mat.quant-gas) symbols [SPI.OPTI]Engineering Sciences [physics]/Optics / Photonic Atomic physics Condensed Matter - Quantum Gases Quantum Physics (quant-ph) Bose–Einstein condensate |
| Zdroj: | Physical Review Letters Physical Review Letters, American Physical Society, 2020, 125 (3), ⟨10.1103/PhysRevLett.125.033401⟩ |
| ISSN: | 0031-9007 1079-7114 |
| DOI: | 10.48550/arxiv.2004.09003 |
| Popis: | Using parametric conversion induced by a Shapiro-type resonance, we produce and characterize a two-mode squeezed vacuum state in a sodium spin 1 Bose-Einstein condensate. Spin-changing collisions generate correlated pairs of atoms in the $m=\pm 1$ Zeeman states out of a condensate with initially all atoms in $m=0$. A novel fluorescence imaging technique with sensitivity $\Delta N \sim 1.6$ atom enables us to demonstrate the role of quantum fluctuations in the initial dynamics and to characterize the full distribution of the final state. Assuming that all atoms share the same spatial wave function, we infer a squeezing parameter of 15.3\,dB. Comment: Supplementary material available as ancillary file |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|