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Measuring the spin of a spin-1/2 and getting a result of 7 — arXiv:2609.37822

Source: arXiv (en)
Original: https://arxiv.org/abs/2609.37822
License (as archived): CC0-1.0
Archived: 2026-10-07T19:29:17.963Z
SHA-256 of the archived text: cb5c40c1919e83d7ce91422d30922a66bd0f3f7b04e98f8532b76d67b16b0917
Stable URL of this page: https://metraipolis.com/documento/dc_f3aaa3975ef5

How to cite

Measuring the spin of a spin-1/2 and getting a result of 7 — arXiv:2609.37822 — arXiv (en), https://arxiv.org/abs/2609.37822 (CC0-1.0); archived copy: https://metraipolis.com/documento/dc_f3aaa3975ef5 (Metraipolis archive dc_f3aaa3975ef5, sha256 cb5c40c1919e83d7ce91422d30922a66bd0f3f7b04e98f8532b76d67b16b0917)

BibTeX

@misc{dcf3aaa3975ef5,
  title = {Measuring the spin of a spin-1/2 and getting a result of 7 — arXiv:2609.37822},
  howpublished = {arXiv (en)},
  url = {https://arxiv.org/abs/2609.37822},
  note = {License CC0-1.0; archived copy https://metraipolis.com/documento/dc_f3aaa3975ef5; sha256 cb5c40c1919e83d7ce91422d30922a66bd0f3f7b04e98f8532b76d67b16b0917},
  year = {2026}
}

Archived text

Reproduced under CC0-1.0. Attribution: arXiv (en), https://arxiv.org/abs/2609.37822. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

The weak value of an operator is the average result of measuring that operator on a quantum system given specified initial and final states. The overlap between these states appears in the denominator of the weak value, and thus if that overlap is small, the weak value can be arbitrarily large. In 1988, Albert, Aharonov, and Vaidman proposed a weak Stern-Gerlach experiment which would be able to measure a so-called anomalous weak value, a measurement result which lies out- side of the eigenvalue spectrum of the operator being measured. Though anomalous weak values have been measured in numerous optical systems, here we present the first such realization of this experiment as originally proposed. By placing a Bose-Einstein condensate of 87Rb in a magnetic gradient and performing an unlikely postselection, we measure an effective magnification of a weak magnetic momentum kick (~ 8 $\mu$m/s) by a factor of 14. We also demonstrate that increasing the momentum kick decreases the "weakness" of the measurement and reduces the amplification.

Tema degli esploratori: fisica e astronomia (retro-catalogo arXiv: annunci del 2026-09-30 in quant-ph).
Categorie arXiv: Quantum Physics (quant-ph) ; Atomic Physics (physics.atom-ph).
Pagina del lavoro: https://arxiv.org/abs/2609.37822 — autori e testo completo sono lì (qui omessi i nomi: nessun dato personale nel deposito).
Licenza: titolo e abstract sono metadati arXiv distribuiti in CC0 1.0; il testo completo ha la licenza scelta dagli autori, indicata sulla pagina.
Letto il 2026-10-07T18:55:50.617Z dalla pagina https://arxiv.org/catchup/quant-ph/2026-09-30?abs=True (consentita dal robots.txt di arxiv.org, con il suo crawl-delay).