Fock-state filtering of squeezed states: enhanced nonclassicality and effects of a thermal bath

Abstract

The ability to tailor photon-number statistics is central to the generation and control of nonclassical states of light. Here, we investigate how Fock-state filtering of squeezed coherent states can be used to engineer their photon statistics. We consider the selective removal of the m=0 and m=1 Fock components and show that this process can enhance the sub-Poissonian character of the field, depending on the coherent amplitude. We then analyze the evolution of these engineered states in a thermal environment. Although all states eventually relax toward thermal statistics, the signatures of the filtering process may persist over a significant part of the evolution, while the purity of the filtered states is rapidly degraded by incoherent population redistribution. Our results illustrate both the potential and the limitations of photon-number engineering in realistic, dissipative settings.

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BibTeX RIS

BibTeX

@misc{oliveira2026fockstate,
  title = {{Fock-state filtering of squeezed states: enhanced nonclassicality and effects of a thermal bath}},
  author = {João Pedro Gonzalez de Oliveira and A. Vidiella-Barranco},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.22668},
  eprint = {2608.22668},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.22668},
  note = {CC BY-NC-ND 4.0},
}

RIS

TY  - UNPB
TI  - Fock-state filtering of squeezed states: enhanced nonclassicality and effects of a thermal bath
AU  - João Pedro Gonzalez de Oliveira
AU  - A. Vidiella-Barranco
PY  - 2026
DA  - 2026/08/28
PB  - arXiv
DO  - 10.48550/arxiv.2608.22668
UR  - https://arxiv.org/abs/2608.22668
AB  - The ability to tailor photon-number statistics is central to the generation and control of nonclassical states of light. Here, we investigate how Fock-state filtering of squeezed coherent states can be used to engineer their photon statistics. We consider the selective removal of the m=0 and m=1 Fock components and show that this process can enhance the sub-Poissonian character of the field, depending on the coherent amplitude. We then analyze the evolution of these engineered states in a thermal environment. Although all states eventually relax toward thermal statistics, the signatures of the filtering process may persist over a significant part of the evolution, while the purity of the filtered states is rapidly degraded by incoherent population redistribution. Our results illustrate both the potential and the limitations of photon-number engineering in realistic, dissipative settings.
ER  -

Abstract

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