• Corpus ID: 244908490

Swap-test interferometry with biased ancilla noise

@inproceedings{vCernotik2021SwaptestIW,
  title={Swap-test interferometry with biased ancilla noise},
  author={Ondvrej vCernot'ik and Iivari Pietikainen and Shruti Puri and Steven M. Girvin and Radim Filip},
  year={2021}
}
The Mach–Zehnder interferometer is a powerful device for detecting small phase shifts between two light beams. Simple input states—such as coherent states or single photons—can reach the standard quantum limit of phase estimation while more complicated states can be used to reach Heisenberg scaling; the latter, however, require complex states at the input of the interferometer which are difficult to prepare. The quest for highly sensitive phase estimation therefore calls for interferometers… 

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