Unambiguous path discrimination in a two-path interferometer

Len, YL; Dai, JB; Englert, BG; Krivitsky, LA

Len, YL; Dai, JB; Englert, BG (reprint author), Natl Univ Singapore, Ctr Quantum Technol, 3 Sci Dr 2, Singapore 117543, Singapore.; Len, YL; Dai, JB; Krivitsky, LA (reprint author), Agcy Sci Technol & Res, Data Storage Inst, 2 Fusionopolis Way,08-01 Innov

PHYSICAL REVIEW A, 2018; 98 (2):

Abstract

When a photon is detected after passing through an interferometer one might wonder which path it took, and a meaningful answer can only be given if on......

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