Two roads to antispacetime in polar distorted B phase: Kibble wall and half-quantum vortex

Abstract

We consider the emergent tetrad gravity and the analog of antispacetime realized in the recent experiments ( J.T. Makinen, et al., Nat. Comm. 10, 237 (2019)) on the composite defects in superfluid ${}^3$He: the Kibble walls bounded by strings (the half quantum vortices). The antispacetime can be reached in two different ways: by the "safe" route around the Alice string or by dangerous route across the Kibble wall. This consideration also suggests the scenario of the formation of the discrete symmetry -- the parity $P$ in Dirac equations -- from the continuous symmetry existing on the more fundamental level.

4 pages, 1 figure, version submitted to JETP Letters

References in corpus (5)

• CPT-Symmetric Universe
• Half-quantum vortices and walls bounded by strings in the polar-distorted phases of topological superfluid ${}^3$He
• Evidence for a Spatially-Modulated Superfluid Phase of ${}^3$He under Confinement
• Dimensional crossover of effective orbital dynamics in polar distorted 3He-A: Transitions to anti-spacetime
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Cited by in corpus (3)

• Half-Quantum Vortex Pair in Polar-distorted B Phase of Superfluid 3He in Aerogels
• Comment to the CPT-symmetric Universe: Two possible extensions
• 50 years in the Landau Institute environment