Spin-Energy Entanglement of a Time-Focused Neutron
- URL: http://arxiv.org/abs/2404.07967v1
- Date: Thu, 11 Apr 2024 17:53:20 GMT
- Title: Spin-Energy Entanglement of a Time-Focused Neutron
- Authors: J. C. Leiner, S. J. Kuhn, S. McKay, J. K. Jochum, F. Li, A. A. M. Irfan, F. Funama, D. Mettus, L. Beddrich, C. Franz, J. Shen, S. R. Parnell, R. M. Dalgliesh, M. Loyd, N. Geerits, G. Ortiz, C. Pfleiderer, R. Pynn,
- Abstract summary: Intra-particle entanglement of individual particles such as neutrons could enable a new class of scattering probes.
We present experimental results demonstrating quantum contextuality as a result of entanglement between the spin and energy modes.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: Intra-particle entanglement of individual particles such as neutrons could enable a new class of scattering probes that are sensitive to entanglement in quantum systems and materials. In this work, we present experimental results demonstrating quantum contextuality as a result of entanglement between the spin and energy modes (i.e., degrees of freedom) of single neutrons in a beam using a pair of resonant radio-frequency neutron spin flippers in the MIEZE configuration (Modulated IntEnsity with Zero Effort). We verified the mode-entanglement by measuring a Clauser-Horne-Shimony-Holt (CHSH) contextuality witness $S$ defined in the spin and energy subsystems, observing a clear breach of the classical bound of $|S| \leq 2$, obtaining $S = 2.40 \pm 0.02$. These entangled beams could enable novel approaches for directly probing dynamics and entanglement in quantum materials whose low-energy excitation scales match those of the incident entangled neutron.
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