Non-Hermitian photon number filtering using N00N state Bloch oscillations

Sean Crowe; Joanna Ptasinski; Melvin Pascoguin; Stefan Evans

Non-Hermitian photon number filtering using N00N state Bloch oscillations

Quantum Physics 2026-08-02 v1

Authors: Sean Crowe , Joanna Ptasinski , Melvin Pascoguin , Stefan Evans

Abstract

We explore Bloch oscillations of $N=1$ and $N=2$ photonic N00N states, using an array of linearly growing effective index waveguides with a simulated asymmetric loss profile. Starting with equal probability input $N=1$ and $N=2$ N00N states, and siphoning off a portion of the waveguides near the half Bloch period, we selectively output specific photon number states. Tuning the input phase, we achieve dynamic switching between 2-photon dominated (80\% of the output) and 1-photon dominated (90\% of the output) cases. This offers a path to improved state preparation in photonic circuits used in computing and networking.

Keywords

N00N state Bloch oscillation non-Hermitian photon number filtering photonic circuit state preparation

Cite

@article{arxiv.2608.01484,
  title  = {Non-Hermitian photon number filtering using N00N state Bloch oscillations},
  author = {Sean Crowe and Joanna Ptasinski and Melvin Pascoguin and Stefan Evans},
  journal= {arXiv preprint arXiv:2608.01484},
  year   = {2026}
}