204 research outputs found
The effective action of a BPS Alice string
Recently a BPS Alice string has been found in a gauge
theory coupled with a charged complex adjoint scalar field arXiv:1703.08971. It
is a half BPS state preserving a half of supercharges when embedded into a
supersymmetric gauge theory. In this paper, we study zero modes of a BPS Alice
string. After presenting and translational zero modes, we construct the
effective action of these modes. In contrast to previous analysis of the
conventional Alice string for which only large distance behaviors are known, we
can perform calculation exactly in the full space thanks to BPS properties
Monopole-vortex complex at large distances and nonAbelian duality
We discuss the large-distance approximation of the monopole-vortex complex
soliton in a hierarchically broken gauge system, SU(N+1) - > SU(N) x U(1) - >
1, in a color-flavor locked SU(N) symmetric vacuum. The ('t Hooft-Polyakov)
monopole of the higher-mass-scale breaking appears as a point and acts as a
source of the thin vortex generated by the lower-energy gauge symmetry
breaking. The exact color-flavor diagonal symmetry of the bulk system is broken
by each individual soliton, leading to nonAbelian orientational CP^{N-1}
zeromodes propagating in the vortex worldsheet, well studied in the literature.
But since the vortex ends at the monopoles these fluctuating modes endow the
monopoles with a local SU(N) charge. This phenomenon is studied by performing
the duality transformation in the presence of the CP^{N-1} moduli space. The
effective action is a CP^{N-1} model defined on a finite-width worldstrip.Comment: 36 pages, 4 figure
Quark-Hadron Crossover with Vortices
The quark-hadron crossover conjecture was proposed as a continuity between
hadronic matter and quark matter with no phase transition. It is based on
matching of symmetry and excitations in both the phases. It connects hyperon
matter and color-flavor locked (CFL) phase of color superconductivity in the
limit of light strange quark mass. We study generalization of this conjecture
in the presence of topological vortices. We propose a picture where hadronic
superfluid vortices in hyperon matter could be connected to non-Abelian
vortices (color magnetic flux tubes) in the CFL phase during this crossover. We
propose that three hadronic superfluid vortices must join together to three
non-Abelian vortices with different color fluxes with the total color magnetic
fluxes canceled out, where the junction is called a colorful boojum.Comment: Prepared for proceedings of QNP-2018, "The 8th International
Conference on Quarks and Nuclear Physics" to be published in JPS Conf. Proc.
Based on the original paper arXiv:1806.09291 [hep-ph
NonAbelian Vortices, Large Winding Limits and Aharonov-Bohm Effects
Remarkable simplification arises from considering vortex equations in the
large winding limit. This was recently used in [1] to display all sorts of
vortex zeromodes, the orientational, translational, fermionic as well as
semi-local, and to relate them to the apparently distinct phenomena of the
Nielsen-Olesen-Ambjorn magnetic instabilities. Here we extend these analyses to
more general types of BPS nonAbelian vortices, taking as a prototype a system
with gauged U(1) x SU(N) x SU(N) symmetry where the VEV of charged scalar
fields in the bifundamental representation breaks the symmetry to SU(N)_{l+r} .
The presence of the massless SU(N)_{l+r} gauge fields in 4D bulk introduces all
sorts of non-local, topological phenomena such as the nonAbelian Aharonov-Bohm
effects, which in the theory with global SU(N)_r group (g_r=0) are washed away
by the strongly fluctuating orientational zeromodes in the worldsheet. Physics
changes qualitatively at the moment the right gauge coupling constant g_r is
turned on.Comment: 31 pages, 4 figure
Effects of strong magnetic fields on neutron superfluidity with spin-orbit interactions
We discuss neutron phases in the core of neutron stars in strong
magnetic field (magnetars). The neutron pairing provides a wide
variety of condensates, such as the uniaxial nematic and (D and D)
biaxial nematic, with different symmetries stemming from the combinations of
spin and momentum. Based on the spin-orbital angular momentum coupling and the
spin-magnetic field coupling of the neutrons, we derive the Ginzburg-Landau
equation containing higher order terms of the magnetic field. We investigate
the phase diagram of the neutron superfluidity, and find that the
D biaxial nematic phase is extended by the higher order terms of the
magnetic field. We also discuss the thermodynamic properties, the heat capacity
and the spin susceptibility.Comment: Prepared for proceedings of QNP-2018, "The 8th International
Conference on Quarks and Nuclear Physics" to be published in JPS Conf. Proc.
Based on the original paper arXiv:1810.04901 [nucl-th
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