# Interference of Temporally Distinguishable Photons Using Frequency-Resolved Detection

## TL;DR

This paper demonstrates quantum interference of photons distinguishable in time by resolving them in frequency, showing control over interference patterns through delay tuning and spectral properties, with implications for scalable boson sampling.

## Contribution

It introduces a method to achieve and manipulate multiphoton interference of temporally distinguishable photons via frequency resolution, enabling dynamic reconfiguration for boson sampling.

## Key findings

- Interference pattern controlled by delay tuning
- Spectral symmetries manifest in interference
- Time-reversed HOM interference observed

## Abstract

We demonstrate quantum interference of three photons that are distinguishable in time, by resolving them in the conjugate parameter, frequency. We show that the multiphoton interference pattern in our setup can be manipulated by tuning the relative delays between the photons, without the need for reconfiguring the optical network. Furthermore, we observe that the symmetries of our optical network and the spectral amplitude of the input photons are manifested in the interference pattern. Moreover, we demonstrate time-reversed HOM-like interference in the spectral correlations using time-bin entangled photon pairs. By adding a time-varying dispersion using a phase modulator, our setup can be used to realize dynamically reconfigurable and scalable boson sampling in the time domain as well as frequency-resolved multiboson correlation sampling.