@article{Czerwinski2026,

title = {Modeling Optical Key Distribution Over a Satellite-to-Ground Link Under Weak Atmospheric Turbulence},

author = {Artur Czerwinski and Mikołaj Lasota and Marcin Jarzyna and Mateusz Kucharczyk and Michał Jachura and Konrad Banaszek},

doi = {10.1109/jstqe.2025.3597073},

issn = {1558-4542},

year  = {2026},

date = {2026-01-00},

urldate = {2026-01-00},

journal = {IEEE J. Select. Topics Quantum Electron.},

volume = {32},

number = {1: Advances in Free Space Laser},

pages = {1--13},

publisher = {Institute of Electrical and Electronics Engineers (IEEE)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Borówka2025,

title = {Optically-biased Rydberg microwave receiver enabled by hybrid nonlinear interferometry},

author = {Sebastian Borówka and Mateusz Mazelanik and Wojciech Wasilewski and Michał Parniak},

doi = {10.1038/s41467-025-63951-9},

issn = {2041-1723},

year  = {2025},

date = {2025-12-00},

urldate = {2025-12-00},

journal = {Nat Commun},

volume = {16},

number = {1},

publisher = {Springer Science and Business Media LLC},

abstract = {<jats:title>Abstract</jats:title>

          <jats:p>Coupling a Rydberg vapour medium to both microwave and optical fields enables the benefits of all-optical detection, such as minimal disturbance of the measured field and resilience to very strong signals, since no conventional antenna is required. However, peak sensitivity typically relies on adding a microwave local oscillator, which compromises the all-optical nature of the measurement. Here we introduce an alternative, <jats:italic>optical-bias detection</jats:italic>, that maintains fully optical operation while achieving high sensitivity. To address laser phase noise, which is critical in this approach, we perform a simultaneous measurement of the noise using a nonlinear process and correct it in real time via data processing. This yields a 35 dB improvement in signal-to-noise ratio compared with the basic method. We demonstrate a sensitivity of <jats:inline-formula>

              <jats:alternatives>

                <jats:tex-math>$$176,{{{rm{nV}}}}/{{{rm{cm}}}}/sqrt{{{{rm{Hz}}}}}$$</jats:tex-math>

                <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML">

                  <mml:mn>176</mml:mn>

                  <mml:mspace/>

                  <mml:mi>nV</mml:mi>

                  <mml:mo>/</mml:mo>

                  <mml:mi>cm</mml:mi>

                  <mml:mo>/</mml:mo>

                  <mml:msqrt>

                    <mml:mrow>

                      <mml:mi>Hz</mml:mi>

                    </mml:mrow>

                  </mml:msqrt>

                </mml:math>

              </jats:alternatives>

            </jats:inline-formula>, reliable operation up to 3.5 mV/cm at 13.9 GHz, and quadrature-amplitude modulated data transmission, underlining the ability to detect microwave field quadratures while preserving the unique advantages of all-optical detection.</jats:p>},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Nowosielski2025,

title = {Superheterodyne Rydberg S-band receiver with a multi-tone local oscillator based on an atomic transition loop},

author = {Jan Nowosielski and Mateusz Mazelanik and Wojciech Wasilewski and Michal Parniak},

doi = {10.1364/ao.557585},

issn = {2155-3165},

year  = {2025},

date = {2025-06-17},

urldate = {2025-06-17},

journal = {Appl. Opt.},

publisher = {Optica Publishing Group},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Kasza2025,

title = {Atomic-optical interferometry in fractured loops: A general solution for Rydberg radio-frequency receivers},

author = {Bartosz Kasza and Sebastian Borówka and Wojciech Wasilewski and Michał Parniak},

doi = {10.1103/physreva.111.053718},

issn = {2469-9934},

year  = {2025},

date = {2025-05-00},

urldate = {2025-05-00},

journal = {Phys. Rev. A},

volume = {111},

number = {5},

publisher = {American Physical Society (APS)},

abstract = {<jats:p>The development of novel radio-frequency atomic receivers has brought attention to the theoretical description of atom-light interactions in sophisticated multilevel schemes. Of special interest are schemes where several interaction paths interfere with each other, bringing about the phase-sensitive measurement of detected radio fields. In the theoretical modeling of those cases, the common assumptions are often insufficient to determine the boundary detection parameters, such as the receiving bandwidth or saturation point, critical for practical considerations of atomic sensing technology. This evokes the resurfacing of the long-standing problem on how to describe an atom-light interaction in a fractured loop. In such a case, the quantum steady state is not achieved even with constant, continuous interactions. Here we propose a method for modeling such a system, basing our approach on the Fourier expansion of a nonequilibrium steady state. The proposed solution is both numerically effective and able to predict edge cases, such as saturation. Furthermore, as an example, we employ this method to provide a complete description of a Rydberg superheterodyne receiver, obtaining the boundary parameters describing the operation of this atomic detector.</jats:p>

          <jats:sec>

            <jats:title/>

            <jats:supplementary-material>

              <jats:permissions>

                <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement>

                <jats:copyright-year>2025</jats:copyright-year>

              </jats:permissions>

            </jats:supplementary-material>

          </jats:sec>},

keywords = {},

pubstate = {published},

tppubtype = {article}

}