Entangled States in Interferometry
Björn Hessmo, Jonas Söderholm, Gunnar G. Bjork · Acta Physica Polonica A · 2002
W e show how some ent angled quantum states can be used to im pro ve inter ferometric measurements .W e describ e w hy Schr odinger -cat states are very sensitive to relative-phase shif ts and w hy relative-phase states as describ ed by A .Luis and L. L. SÇ anche z-Soto resolve the interv al [0, 2 ¤ ] well.W e also describ e how the quantum concept of well-de Ùned relative-phase and the classical visibi li ty of an interf erence pattern are related.