𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Equal time commutation relations and sum rules

✍ Scribed by C.G. Bollini; J.J. Giambiagi

Publisher
Elsevier Science
Year
1966
Weight
159 KB
Volume
87
Category
Article
ISSN
0029-5582

No coin nor oath required. For personal study only.

πŸ“œ SIMILAR VOLUMES

Sum rules and exact relations for quanta
Sum rules and exact relations for quantal Coulomb systems
✍ V.M. Adamyan; I.M. Tkachenko πŸ“‚ Article πŸ“… 2003 πŸ› John Wiley and Sons 🌐 English βš– 97 KB

## Abstract A complex response function describing a reaction of a multi‐particle system to a weak alternating external field is the boundary value of a Nevanlinna class function (i.e. a holomorphic function with non‐negative imaginary part in the upper half‐plane). Attempts of direct calculations

Frequency moment sum rules, recurrence r
Frequency moment sum rules, recurrence relations and continued fractions in nonequilibrium statistical mechanics
✍ M. Howard Lee πŸ“‚ Article πŸ“… 1989 πŸ› Elsevier Science 🌐 English βš– 783 KB

Dynamical properties of quantum many-body systems, e.g., the electron gas, lattice spins are usually studied via frequency moment sum rules. For example, the dynamic structure factor of the density-density response function in an interacting electron gas can be given a continued fraction expansion i