Controlling and detecting spin correlations of ultracold atoms in optical lattices |
| |
Authors: | Trotzky Stefan Chen Yu-Ao Schnorrberger Ute Cheinet Patrick Bloch Immanuel |
| |
Institution: | Fakult?t für Physik, Ludwig-Maximilians-Universit?t, München, Germany. |
| |
Abstract: | We report on the controlled creation of a valence bond state of delocalized effective-spin singlet and triplet dimers by means of a bichromatic optical superlattice. We demonstrate a coherent coupling between the singlet and triplet states and show how the superlattice can be employed to measure the singlet-fraction employing a spin-blockade effect. Our method provides a reliable way to detect and control nearest-neighbor spin correlations in many-body systems of ultracold atoms. Being able to measure these correlations is an important ingredient in studying quantum magnetism in optical lattices. We furthermore employ a SWAP operation between atoms which are part of different triplets, thus effectively increasing their bond-length. Such a SWAP operation provides an important step towards the massively parallel creation of a multiparticle entangled state in the lattice. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|