Simultaneous Readout of Noncommuting Collective Spin Observables beyond the Standard Quantum Limit
| Autor: | Helmut Strobel, Stefan Lannig, Martin Gärttner, Markus K. Oberthaler, Rodrigo Rosa-Medina, Philipp Kunkel, Alexis Bonnin, Maximilian Prüfer |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Quantum Physics Spinor Quantum limit General Physics and Astronomy FOS: Physical sciences Observable Spin structure Coupling (probability) 01 natural sciences Quantum Gases (cond-mat.quant-gas) Quantum mechanics 0103 physical sciences 010306 general physics Condensed Matter - Quantum Gases Quantum Physics (quant-ph) Quantum Hyperfine structure Spin-½ |
| Zdroj: | Physical Review Letters |
| DOI: | 10.48550/arxiv.1904.01471 |
| Popis: | We augment the information extractable from a single absorption image of a spinor Bose-Einstein condensate by coupling to initially empty auxiliary hyperfine states. Performing unitary transformations in both, the original and auxiliary hyperfine manifold, enables the simultaneous measurement of multiple spin-1 observables. We apply this scheme to an elongated atomic cloud of $ ^{87} $Rb to simultaneously read out three orthogonal spin directions and with that directly access the spatial spin structure. The readout even allows the extraction of quantum correlations which we demonstrate by detecting spin nematic squeezing without state tomography. Comment: 11 pages, 4 figures, 5 supplementary figures |
| Databáze: | OpenAIRE |
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