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Is it possible to go full circle (from any starting point) and receive consistent results?
| Term | Meaning |
|---|---|
| Standard Lüscher | Lüschers equation just like in his original papers. Translating continuum finite volume energy levels to SO(3) scattering information (phase shifts). |
| Cartesian Lüscher | Lüschers equation modified such that the cutoff of the zeta function and the corresponding counter terms are explicitly computed in a cartesian (non-spherical!) volume. |
| Dispersion Lüscher | Lüschers equation modified such that the cutoff of the zeta function is related to the lattice spacing and computed in a cartesian volume. The momenta which enter the zeta function are the momenta present on the lattice. |
| ERE | Effective range expansion or phase shifts in the continuum and infinite volume (physical) |