Optical equations for null strings

Fursaev, DV

Fursaev, DV (corresponding author), Dubna State Univ, Univ Skaya Str 19, Dubna 141980, Moscow Region, Russia.; Fursaev, DV (corresponding author), Joint Inst Nucl Res, Lab Theoret Phys, Dubna, Russia.

PHYSICAL REVIEW D, 2021; 103 (12):

Abstract

An optical equation for null strings is derived. The equation is similar to Sachs's optical equations for null geodesic congruences. The string optica......

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