Double sine-Gordon kinks in random fields of force

Journal Article · Thu Sep 01 04:00:00 EDT 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.38.2627· OSTI ID:6906574

Marchesoni, F; Willis, C R

We present a model for a double sine-Gordon (DSG) kink in interaction with an external heat bath which acts on the kink as a systematic dissipative force and a delta-correlated stochastic force. The DSG kink behaves like a ''bound state'' of two single sine-Gordon kinks which we describe as a center-of-mass variable X(t) and an internal anharmonic oscillator variable R(t) by means of a constrained Hamiltonian formalism using Dirac brackets. We apply our model to DSG kinks which appear in antiferromagnetic chains.

• Research Organization: Department of Physics, Boston University, Boston, Massachusetts 02215
• OSTI ID: 6906574
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 38:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

657002* -- Theoretical & Mathematical Physics-- Classical & Quantum Mechanics
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTIFERROMAGNETIC MATERIALS
BROWNIAN MOVEMENT
DIFFERENTIAL EQUATIONS
EQUATIONS
EQUATIONS OF MOTION
EXCITONS
FIELD EQUATIONS
FIELD THEORIES
INTERACTIONS
MAGNETIC MATERIALS
MATERIALS
PARTIAL DIFFERENTIAL EQUATIONS
PHONONS
QUANTUM FIELD THEORY
QUASI PARTICLES
SINE-GORDON EQUATION
USES