Novel path integral approach to effective field theories for d-dimensional quantum spin systems--

Journal Article · Sat Jul 01 00:00:00 EDT 1989 · International Journal of Modern Physics B; (USA)

DOI:https://doi.org/10.1142/S0217979289000737· OSTI ID:6849587

Angelucci, A ^[1]; Jug, G ^[2]

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1. Trieste Univ. (Italy). Dipt. di Fisica Teorica
2. International Centre for Theoretical Physics, Trieste (Italy)

The authors present a novel path integral formulation for the effective field theory describing d-dimensional quantum spin models. The new approach avoids the coherent states representation, but at very low temperatures reproduces all known results obtained with the latter technique for describing excitations of the Neel state. The possibility of exploring higher-temperature, unbroken-symmetry state excitations (such as those appropriate for the quantum spin-liquid state) within this method is illustrated.

• OSTI ID: 6849587
• Journal Information: International Journal of Modern Physics B; (USA), Vol. 3:7; ISSN 0217-9792
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
QUANTUM FIELD THEORY
QUANTUM FLUIDS
FEYNMAN PATH INTEGRAL
CALCULATION METHODS
EXCITED STATES
HIGH TEMPERATURE
NEEL TEMPERATURE
SPIN
VERY LOW TEMPERATURE
ANGULAR MOMENTUM
ENERGY LEVELS
FIELD THEORIES
FLUIDS
INTEGRALS
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
645400* - High Energy Physics- Field Theory
657002 - Theoretical & Mathematical Physics- Classical & Quantum Mechanics