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Homogeneously precessing domain in (3)He-B: formation and properties
1P L Kapitza Institute for Physical Problems, 2 Kosygina Street, 119334 Moscow, Russia.
Superfluid Helium-3 B phase exhibits nonlocal spin motion, forming homogeneously precessing domains (HPDs) during nuclear magnetic resonance. These domains maintain coherent spin precession via Cooper pair condensate spin currents.
Area of Science:
- Condensed Matter Physics
- Quantum Fluids
- Nuclear Magnetic Resonance
Background:
- Superfluid phases of Helium-3 exhibit unique quantum phenomena.
- Long-range order in superfluids leads to nonlocal spin dynamics.
- The B phase is characterized by complex spin behavior.
Purpose of the Study:
- To review key experiments and theory on homogeneously precessing domains (HPDs) in superfluid Helium-3 B.
- To explain the nonlocal spin motion within HPDs.
- To highlight the role of Cooper pair condensate in maintaining spin coherence.
Main Methods:
- Experimental observations under nuclear magnetic resonance (NMR) conditions.
- Theoretical analysis of spin dynamics in superfluid Helium-3.
- Review of established experimental and theoretical findings.
Main Results:
- Nonlocal spin motion is a key feature of superfluid Helium-3 phases.
- HPDs form in the B phase during NMR, demonstrating coherent spin precession.
- Spin coherence within HPDs is sustained by spin currents from Cooper pairs, even in nonuniform magnetic fields.
Conclusions:
- HPDs are a significant manifestation of nonlocal spin dynamics in superfluid Helium-3.
- The underlying theory explains the stability and coherence of HPDs.
- Experimental studies have validated the theoretical predictions regarding HPD properties.
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