Multimode squeezed light generation and characterization

@misc{chudakov2026multimode,
  title = {{Multimode squeezed light generation and characterization}},
  author = {Alexander Chudakov and Vladislav Severin and Anastasia Poshevkina and Danil Malyshev and Kirill Kuznetsov and Olga Tikhonova and Dmitry Kalashnikov and Polina Sharapova},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.08591},
  eprint = {2609.08591},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.08591},
}

TY  - UNPB
TI  - Multimode squeezed light generation and characterization
AU  - Alexander Chudakov
AU  - Vladislav Severin
AU  - Anastasia Poshevkina
AU  - Danil Malyshev
AU  - Kirill Kuznetsov
AU  - Olga Tikhonova
AU  - Dmitry Kalashnikov
AU  - Polina Sharapova
PY  - 2026
DA  - 2026/09/08
PB  - arXiv
DO  - 10.48550/arxiv.2609.08591
UR  - https://arxiv.org/abs/2609.08591
AB  - Nowadays, the realization of quantum computations and communications based on continuous variables has attracted a significant attention due to a substantial expansion of the system dimensionality. The main progress in this area is attributed to the implementation of multimode systems based on squeezed states of light. One of the simplest ways to generate such states relies upon their producing in a single-pass optical parametric amplifier (OPA) using ultrafast pumping. However, for homodyne detection of such multimode states, the profile of the local oscillator (LO) must perfectly match the profile of the measured mode. Usually, this is not the case; therefore a proper treatment of multimode squeezing is required. In this work, we study both theoretically and experimentally the multimode squeezed light generated in type-0 and type-II OPA. We characterize such sources and investigate the degree of squeezing in dependence on the LO spectral profile, employing a pulse shaping technique. The theoretical analysis is performed using the Schmidt-mode theory. This work might have a significant impact on the realization of multimode quantum protocols
ER  -