Compound beams for direct experimental comparison of quantum operations
- 1University of Oslo
- 2Palacký University
- 3Institute of Physics of the Czech Academy of Sciences
Abstract
Compound beams composed of simple experimental blocks (detected in simultaneous detection windows) that form specific quantum-correlated structures are suggested for simulating the properties of different quantum operations used for creating highly nonclassical and entangled multi-mode states needed in quantum communication, metrology, and information protocols. Qualitative and quantitative comparison of multi-photon addition (PA) and subtraction in compound multi-mode thermal as well as sub-Poissonian beams and multi-mode twin beams with their intensities extending over two orders in magnitude is provided. Adding and subtracting up to twenty photocounts, optimal conditions for the generation of experimental nonclassical states are identified. In general, PA is identified as advantageous over photon subtraction (PS) for the multi-mode thermal and sub-Poissonian beams: It induces (enhances) the nonclassicality in the former (latter) state. Contrary to this, PS outperforms PA in the multi-mode twin beams. Moreover, exploiting temporal photon-pair correlations in compound twin beams when post-selecting, nearly ideal experimental photon(s) addition is demonstrated. The results apply for the beams with mean photon number per mode much less than one.
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BibTeX
@article{thapliyal2026compound,
title = {{Compound beams for direct experimental comparison of quantum operations}},
author = {Kishore Thapliyal and Jan Peřina Jr and Pavel Pavlíček and Antonín Černoch},
journal = {New Journal of Physics},
year = {2026},
month = oct,
doi = {10.1088/1367-2630/aeae64},
url = {https://iopscience.iop.org/article/10.1088/1367-2630/aeae64},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Compound beams for direct experimental comparison of quantum operations
AU - Kishore Thapliyal
AU - Jan Peřina Jr
AU - Pavel Pavlíček
AU - Antonín Černoch
PY - 2026
DA - 2026/10/15
JO - New Journal of Physics
DO - 10.1088/1367-2630/aeae64
UR - https://iopscience.iop.org/article/10.1088/1367-2630/aeae64
AB - Compound beams composed of simple experimental blocks (detected in simultaneous detection windows) that form specific quantum-correlated structures are suggested for simulating the properties of different quantum operations used for creating highly nonclassical and entangled multi-mode states needed in quantum communication, metrology, and information protocols. Qualitative and quantitative comparison of multi-photon addition (PA) and subtraction in compound multi-mode thermal as well as sub-Poissonian beams and multi-mode twin beams with their intensities extending over two orders in magnitude is provided. Adding and subtracting up to twenty photocounts, optimal conditions for the generation of experimental nonclassical states are identified. In general, PA is identified as advantageous over photon subtraction (PS) for the multi-mode thermal and sub-Poissonian beams: It induces (enhances) the nonclassicality in the former (latter) state. Contrary to this, PS outperforms PA in the multi-mode twin beams. Moreover, exploiting temporal photon-pair correlations in compound twin beams when post-selecting, nearly ideal experimental photon(s) addition is demonstrated. The results apply for the beams with mean photon number per mode much less than one.
SN - 1367-2630
ER -