Patent ID: 11886092
Assignee: THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE NAVY
Field: Optics (Instruments)
Classification: CPC G  B | IPC G

Claim 0:
1. A Mach-Zehnder interferometer (MZI) that receives a coherent input photon in an initial pointer state along an emission direction for producing a continuous variable qubit, said MZI comprising:
first and second output ports perpendicular to each other and respectively disposed parallel and perpendicular to the emission direction, said first output port having a detector;
first and second beam-splitters, said first beam-splitter disposed collinearly with the emission direction, said second beam-splitter disposed adjacent said first and second output ports and being parallel to and offset from the emission direction;
first and second mirrors, said first mirror disposed offset from said first beam-splitter and perpendicular to the emission direction, said second mirror disposed collinearly with the emission direction and said first beam-splitter; and
a weak value interaction operator disposed between said first mirror and said second beam-splitter for measuring interaction therebetween, wherein
the input photon either reflects from or else passes through said first beam-splitter, reflects from either of said first and second mirrors, either reflects from or else passes through said second beam-splitter, and said interaction operator generates a post-selected magic state photon at said detector to produce the continuous variable qubit.