Characterizing the Larkin-Ovchinnikov-Fulde-Ferrel phase induced by the chromomagnetic instability

Journal Article · Mon May 01 04:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.73.094016· OSTI ID:20782991

Fukushima, Kenji ^[1]

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1. RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973 (United States)

We discuss possible destinations from the chromomagnetic instability in color superconductors with Fermi surface mismatch {delta}{mu}. In the two-flavor superconducting (2SC) phase we calculate the effective potential for color vector potentials A{sub {alpha}} which are interpreted as the net momenta q of pairing in the Larkin-Ovchinnikov-Fulde-Ferrel (LOFF) phase. When 1/{radical}(2)<{delta}{mu}/{delta}<1 where {delta} is the gap energy, the effective potential suggests that the instability leads to a LOFF-like state which is characterized by color-rotated phase oscillations with small q. In the vicinity of {delta}{mu}/{delta}=1/{radical}(2) the magnitude of q continuously increases from zero as the effective potential has negative larger curvature at vanishing A{sub {alpha}} that is the Meissner mass squared. In the gapless 2SC (g2SC) phase, in contrast, the effective potential has a minimum at gA{sub {alpha}}{approx}{delta}{mu}{approx}{delta} even when the negative Meissner mass squared is infinitesimally small. Our results imply that the chromomagnetic instability found in the gapless phase drives the system toward the LOFF state with q{approx}{delta}{mu}.

• OSTI ID: 20782991
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 9 Vol. 73; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COLOR MODEL
FERMI LEVEL
FLAVOR MODEL
INSTABILITY
MASS
PHASE OSCILLATIONS
POTENTIALS
QUANTUM CHROMODYNAMICS
QUARK MATTER
SUPERCONDUCTORS
VECTORS