Electronic Resource
Experimental evidence for the two-path description of neutron spin echo
| العنوان: | Experimental evidence for the two-path description of neutron spin echo |
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| المؤلفون: | McKay, S. (author), Irfan, A. A.M. (author), Le Thien, Q. (author), Geerits, N. (author), Parnell, S.R. (author), Dalgliesh, R. M. (author), Lavrik, N. V. (author), Kravchenko, I. I. (author), Ortiz, G. (author), Pynn, R. (author) |
| بيانات النشر: | 2024 |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | We describe an experiment that strongly supports a two-path interferometric model in which the spin-up and spin-down components of each neutron propagate coherently along spatially separated parallel paths in a typical neutron spin-echo small-angle scattering (SESANS) experiment. Specifically, we show that the usual semi-classical, single-path treatment of Larmor precession of a polarized neutron in an external magnetic field predicts a damping as a function of the spin-echo length of the SESANS signal obtained with a periodic phase grating when the transverse width of the neutron wave packet is finite. However, no such damping is observed experimentally, implying either that the Larmor model is incorrect or that the transverse extent of the wave packet is very large. In contrast, we demonstrate theoretically that a quantum-mechanical interferometric model in which the two mode-entangled (i.e., intraparticle entangled) spin states of a single neutron are separated in space when they interact with the grating accurately predicts the measured SESANS signal, which is independent of the wave packet width. RID/TS/Instrumenten groep |
| مصطلحات الفهرس: | journal article |
| DOI: | 10.1103.PhysRevA.109.042420 |
| URL: | Physical Review A: covering atomic, molecular, and optical physics and quantum information--2469-9926--e4f2f0d6-141b-4a83-93ea-e3fa29c83d7d |
| الاتاحة: | Open access content. Open access content © 2024 S. McKay, A. A.M. Irfan, Q. Le Thien, N. Geerits, S.R. Parnell, R. M. Dalgliesh, N. V. Lavrik, I. I. Kravchenko, G. Ortiz, R. Pynn |
| ملاحظة: | English |
| Other Numbers: | NLTUD oai:tudelft.nl:uuid:cfb3abec-232d-4d44-be97-ed0b50e74cd5 doi:10.1103/PhysRevA.109.042420 1434557971 |
| المصدر المساهم: | DELFT UNIV OF TECHNOL From OAIster®, provided by the OCLC Cooperative. |
| رقم الانضمام: | edsoai.on1434557971 |
| قاعدة البيانات: | OAIster |
| DOI: | 10.1103.PhysRevA.109.042420 |
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