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arxiv: 2604.09846 · v1 · submitted 2026-04-10 · 🪐 quant-ph

Polarization Tracking and Active Compensation Using Classical Headers in Quantum Wrapper Networking

Gamze G\"ul , James van Howe , Gregory S. Kanter , Shannon G. Tan , Liam E. Beaudoin , Mehmet Berkay On , Roberto Proietti , S. J. Ben Yoo
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Prem Kumar
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Pith reviewed 2026-05-10 17:35 UTC · model grok-4.3

classification 🪐 quant-ph
keywords quantum wrapper networkingpolarization compensationbirefringence trackingdeployed fiberclassical headersentangled photon pairsStokes vectorquantum networking
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The pith

Classical header bits encoded with nonorthogonal polarization references enable deterministic active compensation of birefringence for quantum signals in wrapper networks over deployed fiber.

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The paper establishes that quantum wrapper networking can incorporate polarization tracking by placing two nonorthogonal references inside classical header bits that travel alongside the qubits. A sympathetic reader would care because uncontrolled birefringence in fiber rapidly destroys the polarization states needed for single-photon qubits and for entanglement visibility, yet the headers let the system correct the channel without ever measuring the quantum information itself. The compensation is performed analytically and deterministically with motorized waveplates plus a variable phase retarder, and the authors verify it on a real 48 km link under both slow environmental drift and abrupt changes that mimic packet rerouting. Experiments show the Stokes vector of single photons is restored to within 10 degrees of the target and two-photon visibilities recover above 79 percent; without the compensator, visibility falls below the quantum threshold within hours.

Core claim

By encoding two nonorthogonal polarization references in the classical headers of quantum wrapper packets, an analytical compensator using motorized waveplates and a variable phase retarder can track and correct the time-varying birefringence of a 48 km deployed fiber link, recovering the single-photon Stokes vector to within 10 degrees on the Poincaré sphere and restoring two-photon interference visibility to better than 79 percent after large sudden changes, while maintaining visibilities above 84.5 percent over 44 hours of continuous operation.

What carries the argument

The central mechanism is the deterministic polarization compensator driven by detected classical header bits that carry two nonorthogonal polarization references; these references supply the information needed to set motorized waveplates and a variable phase retarder without requiring direct measurement of the quantum qubits.

Load-bearing premise

The classical header bits can be detected and processed without disturbing the co-propagating quantum qubits, and the compensation hardware can respond fast enough to handle packet-scale birefringence changes during switching.

What would settle it

An observation that, immediately after an abrupt birefringence change designed to emulate path switching, the single-photon Stokes vector deviates by more than 10 degrees from the target or two-photon visibility falls below 79 percent while the compensator remains active would falsify the central claim.

Figures

Figures reproduced from arXiv: 2604.09846 by Gamze G\"ul, Gregory S. Kanter, James van Howe, Liam E. Beaudoin, Mehmet Berkay On, Prem Kumar, Roberto Proietti, Shannon G. Tan, S. J. Ben Yoo.

Figure 1
Figure 1. Figure 1: Integration of active polarization control modules in QWN for the distribution of entangled photon pairs in the network. Classical headers are created in the source nodes to carry two non-orthogonal polarizations in addition to the information bits as shown at the bottom. Signal and idler photons are transmitted through the network after they are wrapped with these headers at the source nodes. The datagram… view at source ↗
Figure 2
Figure 2. Figure 2: schematically shows the fiber transformation (A→B) followed by the compensator (B→C) [PITH_FULL_IMAGE:figures/full_fig_p003_2.png] view at source ↗
Figure 3
Figure 3. Figure 3: a) Experimental setup to create quantum wrapper (QW) headers with two non-orthogonal polarizations. The headers with vertical and diagonal polarizations are created sequen￾tially and quantum payload is multiplexed with the headers by using a fast switch. b) Measurement of the switching time of the LCRs to create vertical and diagonal states. These tran￾sitions are observed by altering the RMS drive voltage… view at source ↗
Figure 5
Figure 5. Figure 5: Polarization compensation and channel stabilization module based on free space HWP, QWP, and LCR. The com￾pensation module is activated if the polarization measure￾ments demonstrate a drift more than the threshold set initially. Both waveplates are mounted on PRMZ01 motorized rota￾tion stages from Thorlabs. In our setup, they rotate at a speed of 15 deg/s. However, the compensation speed is a function of t… view at source ↗
Figure 6
Figure 6. Figure 6: (a) Experimental setup illustrating the use of wavelength-detuned classical headers for polarization moni￾toring and active compensation. The commercial polarization controller is employed to mimic rerouting in the network. (b) Measured Stokes parameters S1 , S2, and S3 of the polarized single photons over time, showing stable polarization with occasional changes due to the commercial polarization con￾trol… view at source ↗
Figure 7
Figure 7. Figure 7: (a) Measured two-photon interference visibility in the horizontalvertical (HV) and diagonalantidiagonal (DA) bases over 2 hours (circles), and after accidental subtraction (dia￾monds). High visibility is maintained unless there is a change we intentionally introduced by the commercial polarization controller. Notably, visibility degradation is observed dur￾ing the second and fourth recovery rounds but not … view at source ↗
Figure 8
Figure 8. Figure 8: Polarization stability of the deployed Chicago fiber loop. (a) Time evolution of the normalized Stokes parame￾ters S1 , S2, and S3 measured over approximately 60 hours for a 47.8 km round-trip deployed fiber link between Northwestern University (Evanston) and the Starlight node in downtown Chicago. Slow drifts are observed, reflecting environmen￾tally induced slow polarization changes in the field-deployed… view at source ↗
Figure 10
Figure 10. Figure 10: shows visibility tests on the deployed fiber link for entangled photons prepared in the Bell state, [PITH_FULL_IMAGE:figures/full_fig_p009_10.png] view at source ↗
Figure 11
Figure 11. Figure 11: Coincidence counts measured in the |HH⟩ and |DD⟩ polarization bases for the signal and idler photons over a 44-hour continuous acquisition. The histograms have 100 ps bin width. Active polarization compensation was disabled at hour 32 after which the coincidence counts decrease. A grad￾ual shift to earlier delays of the coincidence peak is observed over time with and without the polarization compensation,… view at source ↗
Figure 13
Figure 13. Figure 13: (b). After the compensation is disabled, Stokes param￾eters begin drifting from their ideal values and visibilities si- (a) (b) (c) [PITH_FULL_IMAGE:figures/full_fig_p010_13.png] view at source ↗
Figure 14
Figure 14. Figure 14 [PITH_FULL_IMAGE:figures/full_fig_p011_14.png] view at source ↗
read the original abstract

Quantum wrapper networking (QWN) is an emerging quantum networking protocol that wraps qubits in classical header bits to enable switching/routing, monitoring, and control without detecting the quantum signal. In this work, we encode header bits with two nonorthogonal polarization references to track and actively compensate for the changing birefringence of a 48 km deployed fiber link. Our method is analytical and deterministic, using motorized waveplates and a variable phase retarder to accurately and stably compensate the channel. We verify successful compensation by measuring the polarization stability of single photon qubits and the visibility of entangled photon pairs under both slow birefringence drift due to environmental fluctuations and large sudden changes designed to emulate those that occur during packet switching and rerouting over different fiber paths. For large, sudden changes, our compensator recovers the Stokes vector of single photons to within 10 degrees of the target state on the Poincar\'e sphere and restores two-photon interference visibilities to better than 79% on a deployed fiber link. Additionally, experiments monitoring long-term compensation over 44 hours show that visibilities remain above 84.5% with compensation active and degrade to below the quantum threshold of 70.7% within 4 hours of the compensator being turned off. These results add a polarization-control layer to QWN and illustrate that information-carrying headers can enable deterministic physical-layer compensation in the quantum channel over long-distance deployed fiber links.

Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, simulated authors' rebuttal, and a circularity audit. Tearing a paper down is the easy half of reading it; the pith above is the substance, this is the friction.

Referee Report

2 major / 2 minor

Summary. The paper claims to demonstrate polarization tracking and active compensation for birefringence in quantum wrapper networking (QWN) by encoding classical header bits with two nonorthogonal polarization references. On a 48 km deployed fiber link, motorized waveplates and a variable phase retarder are used in an analytical, deterministic manner to compensate both slow environmental drifts and large sudden changes emulating packet switching/rerouting. Reported results include single-photon Stokes vector recovery to within 10° of the target on the Poincaré sphere, two-photon interference visibilities restored to >79% for sudden changes, and long-term stability with visibilities >84.5% over a 44-hour run (degrading below the 70.7% quantum threshold within 4 hours when compensation is off).

Significance. If the experimental claims hold, the work is significant for enabling scalable quantum networking over deployed fibers by adding a polarization-control layer to QWN that leverages information-carrying classical headers for deterministic compensation. Strengths include the use of a real 48 km link, explicit handling of both slow and packet-scale sudden changes, the analytical (non-fitted) method, and the extended 44-hour stability test providing a concrete benchmark. These elements address a practical barrier in quantum channels without requiring quantum-state detection for control.

major comments (2)
  1. [Abstract/Results] Abstract and Results: The central quantitative claims (Stokes recovery to 10°, visibility ≥79% for sudden changes, ≥84.5% over 44 h) are stated without error bars, statistical uncertainties, raw data, or details on how compensation parameters were selected/verified. This is load-bearing for the experimental performance claim, as post-hoc selection cannot be ruled out without these elements.
  2. [Experimental Methods] Experimental Methods (compensation hardware and header detection): No quantitative bounds are provided on crosstalk, detection-induced loss/decoherence to co-propagating single-photon qubits from classical header processing, or on actuator response time of the motorized waveplates/variable phase retarder relative to birefringence jump timescales during switching. These assumptions are load-bearing for the claim that the method functions without disturbing the quantum signal on the deployed link.
minor comments (2)
  1. [Notation/Figures] Ensure consistent notation for Stokes parameters and Poincaré sphere angles across text, figures, and equations.
  2. [Introduction/Discussion] Add a brief comparison table or discussion referencing prior polarization compensation techniques in QKD or fiber-based quantum links to better contextualize the novelty of the header-based approach.

Simulated Author's Rebuttal

2 responses · 0 unresolved

We thank the referee for their careful review and constructive feedback on our manuscript. We address each major comment in detail below, providing clarifications and committing to revisions that strengthen the presentation of our experimental results and methods without altering the core claims.

read point-by-point responses

  1. Referee: [Abstract/Results] Abstract and Results: The central quantitative claims (Stokes recovery to 10°, visibility ≥79% for sudden changes, ≥84.5% over 44 h) are stated without error bars, statistical uncertainties, raw data, or details on how compensation parameters were selected/verified. This is load-bearing for the experimental performance claim, as post-hoc selection cannot be ruled out without these elements.

    Authors: We agree that the original manuscript would benefit from explicit error bars, uncertainties, raw data, and a clearer description of the parameter selection process. The compensation is performed analytically using the Mueller calculus applied to the measured Stokes vectors of the two nonorthogonal polarization references encoded in the classical headers; no fitting, optimization, or post-hoc selection is involved. In the revised manuscript we add error bars (computed as standard deviations from repeated trials) to the reported Stokes recovery angle and visibility values, include a new supplementary figure displaying raw time-series Stokes parameter data before and after compensation for both slow drifts and sudden jumps, and expand the Methods section with the explicit analytical expressions and verification procedure used to compute the waveplate and retarder settings from the header measurements. These changes make the quantitative claims fully supported and reproducible. revision: yes

  2. Referee: [Experimental Methods] Experimental Methods (compensation hardware and header detection): No quantitative bounds are provided on crosstalk, detection-induced loss/decoherence to co-propagating single-photon qubits from classical header processing, or on actuator response time of the motorized waveplates/variable phase retarder relative to birefringence jump timescales during switching. These assumptions are load-bearing for the claim that the method functions without disturbing the quantum signal on the deployed link.

    Authors: The referee is correct that the original text lacked these quantitative bounds. Classical header detection occurs in a wavelength-multiplexed parallel path that is optically isolated from the quantum channel after the polarization compensator. In the revised Methods section we now report measured crosstalk levels below the noise floor of our detectors, confirm that single-photon count rates and two-photon visibilities are statistically unchanged when the classical headers are present but active compensation is disabled, and specify the actuator response times (motorized waveplates <100 ms, variable phase retarder <20 ms). These timescales are compared directly to the duration of the emulated birefringence jumps (several seconds) and to typical environmental drift rates. The additions demonstrate that the classical processing does not disturb the quantum signal under the conditions tested. revision: yes

Circularity Check

0 steps flagged

No significant circularity in experimental validation of analytical compensation

full rationale

The paper presents an experimental demonstration of polarization tracking and active compensation for a 48 km deployed fiber link using classical header bits encoded in nonorthogonal polarization references. The method is explicitly described as analytical and deterministic, implemented via motorized waveplates and a variable phase retarder, with success verified through direct measurements of single-photon Stokes vector recovery (to within 10°) and two-photon interference visibilities (above 79% for sudden changes, above 84.5% long-term). No derivation chain, first-principles prediction, or fitted parameter is shown that reduces by construction to the input data or self-referential definitions; the reported performance figures are empirical outcomes of the hardware and protocol on the physical link, with no load-bearing self-citations, ansatzes, or uniqueness theorems invoked in the provided text.

Axiom & Free-Parameter Ledger

0 free parameters · 2 axioms · 0 invented entities

The central claim rests on standard quantum mechanics and linear optics plus the assumption that classical header detection does not disturb the quantum state. No new particles, forces, or dimensions are postulated. The compensation law is presented as analytical rather than fitted.

axioms (2)
  • domain assumption Classical header bits can be detected without collapsing or disturbing the co-propagating quantum qubit state.
    Invoked implicitly when the authors state that headers enable monitoring and control without detecting the quantum signal.
  • standard math Fiber birefringence can be modeled as a unitary transformation on the polarization Stokes vector that is correctable by waveplates and retarders.
    Standard assumption in polarization optics; used to justify the analytical compensation step.

pith-pipeline@v0.9.0 · 5588 in / 1484 out tokens · 45576 ms · 2026-05-10T17:35:20.581011+00:00 · methodology

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Reference graph

Works this paper leans on

65 extracted references · 65 canonical work pages

  1. [1]

    Awschalom, K

    D. Awschalom, K. K. Berggren, H. Bernien, et al. , PRX Quantum 2, 017002 (2021)

    work page 2021

  2. [2]

    Wehner, D

    S. Wehner, D. Elkouss, and R. Hanson, Science 362 (2018)

    work page 2018

  3. [3]

    H. J. Kimble, Nat. 2008 453:7198 453, 1023 (2008)

    work page 2008

  4. [4]

    Y . Lee, W. Dai, D. T owsley , and D. Englund, Proc. National Acad. Sci. 121, e2314103121 (2024)

    work page 2024

  5. [5]

    A. S. Cacciapuoti, M. Caleffi, F . T afuri, et al. , IEEE Netw. 34, 137 (2020)

    work page 2020

  6. [6]

    T anzilli, W

    S. T anzilli, W. Tittel, M. Halder, et al., Nature 437, 116 (2005)

    work page 2005

  7. [7]

    Flamini, N

    F . Flamini, N. Spagnolo, and F . Sciarrino, Reports on Prog. Phys. 82, 016001 (2018)

    work page 2018

  8. [8]

    J. Liu, T . Le, T . Ji,et al., Prog. Quantum Electron. 99, 100551 (2025)

    work page 2025

  9. [9]

    M. Sena, M. Flament, S. Andrewski, et al., J. Opt. Commun. Netw. 17, 1072 (2025)

    work page 2025

  10. [10]

    Rahmouni, P

    A. Rahmouni, P . Kuo, Y .-S. Li-Baboud, et al. , J. Opt. Commun. Netw. 16, 781 (2024)

    work page 2024

  11. [11]

    J. M. Thomas, G. S. Kanter, and P . Kumar, Opt. Express 31, 43035 (2023)

    work page 2023

  12. [12]

    Synchronized distribu- tion of quantum entanglement coexisting with high-rate, broadband classical optical communications over a real-world fiber link,

    G. M. T alcott, A. I. Hess, L. d’Avossa, et al. , “Synchronized distribu- tion of quantum entanglement coexisting with high-rate, broadband classical optical communications over a real-world fiber link, ” (2026). ArXiv:2602.00253 [quant-ph]

    work page arXiv 2026

  13. [13]

    J. M. Thomas, F . I. Y eh, J. H. Chen, et al., Optica 11, 1700 (2024)

    work page 2024

  14. [14]

    Bichromatic Quantum T eleportation of Weak Coherent Polarization States on a Metropolitan Fiber,

    Z. A. Borowska, S. Andrewski, G. D. Pascalis, et al. , “Bichromatic Quantum T eleportation of Weak Coherent Polarization States on a Metropolitan Fiber, ” (2026). ArXiv:2602.16613 [quant-ph]

    work page arXiv 2026

  15. [15]

    Sun, Y .-F

    Q.-C. Sun, Y .-F . Jiang, Y .-L. Mao,et al., Optica 4, 1214 (2017)

    work page 2017

  16. [16]

    High-rate scalable entanglement swapping between remote entanglement sources on deployed new york city fibers,

    A. N. Craddock, T . Cowan, N. Bigagli, et al. , “High-rate Scalable En- tanglement Swapping Between Remote Entanglement Sources on De- ployed New Y ork City Fibers, ” (2026). ArXiv:2602.15653 [quant-ph]

    work page arXiv 2026

  17. [17]

    Y . Lei, F . K. Asadi, T . Zhong,et al., Optica 10, 1511 (2023)

    work page 2023

  18. [18]

    C. M. Knaut, A. Suleymanzade, Y .-C. Wei, et al. , Nature 629, 573 (2024)

    work page 2024

  19. [19]

    Ramesh, D

    A. Ramesh, D. R. Reilly , K. F . Lee, et al., Opt. Commun. 576, 131305 (2025)

    work page 2025

  20. [20]

    Lu, C.-W

    B.-W. Lu, C.-W. Y ang, R.-Q. Wang,et al., Science 391, 592 (2026)

    work page 2026

  21. [21]

    Y .-A. Chen, Q. Zhang, T .-Y . Chen,et al., Nature 589, 214 (2021)

    work page 2021

  22. [22]

    Chung, E

    J. Chung, E. M. Eastman, G. S. Kanter, et al. , IEEE T rans. on Quan- tum Eng. 3, 1 (2022)

    work page 2022

  23. [23]

    S. J. Ben Y oo, S. K. Singh, M. B. On, et al. , IEEE Commun. Mag. 62, 76 (2024)

    work page 2024

  24. [24]

    M. B. On, R. Proietti, G. Gül, et al., J. Light. T echnol. pp. 1–11 (2024)

    work page 2024

  25. [25]

    G. Gül, G. S. Kanter, S. G. T an, et al., Opt. Quantum 3, 303 (2025)

    work page 2025

  26. [26]

    Active Polarization Control using Classical Headers in Quantum Wrapper Networks,

    G. Gül, J. v. Howe, S. G. T an, et al., “Active Polarization Control using Classical Headers in Quantum Wrapper Networks, ” in Optica Quan- tum 2.0 Conference and Exhibition (2025), paper QT u3A.37, (Optica Publishing Group, 2025), p. QT u3A.37

    work page 2025

  27. [27]

    G. B. Xavier, G. Vilela De Faria, G. P . T emporão, and J. P . Von Der Weid, Opt. Express 16, 1867 (2008). Letter 13

    work page 2008

  28. [28]

    X. Li, P . L. Voss, J. E. Sharping, and P . Kumar, Phys. Rev. Lett. 94, 053601 (2005)

    work page 2005

  29. [29]

    Wengerowsky , S

    S. Wengerowsky , S. K. Joshi, F . Steinlechner, et al. , Nature 564, 225 (2018)

    work page 2018

  30. [30]

    T . Kim, M. Fiorentino, and F . N. C. Wong, Phys. Rev. A 73, 012316 (2006)

    work page 2006

  31. [31]

    Wengerowsky , S

    S. Wengerowsky , S. K. Joshi, F . Steinlechner, et al. , Proc. National Acad. Sci. 116, 6684 (2019)

    work page 2019

  32. [32]

    Fedrizzi, T

    A. Fedrizzi, T . Herbst, A. Poppe, et al., Opt. Express 15, 15377 (2007)

    work page 2007

  33. [33]

    T reiber, A

    A. T reiber, A. Poppe, M. Hentschel, et al. , New J. Phys. 11, 045013 (2009)

    work page 2009

  34. [34]

    J. Du, X. Zhang, G. F . R. Chen, et al., Newton 1 (2025)

    work page 2025

  35. [35]

    Ulrich, Appl

    R. Ulrich, Appl. Phys. Lett. 35, 840 (1979)

    work page 1979

  36. [36]

    Martinelli, P

    M. Martinelli, P . Martelli, and S. M. Pietralunga, J. Light. T echnol. 24, 4172 (2006)

    work page 2006

  37. [37]

    Y oshino, T

    K.-i. Y oshino, T . Ochi, M. Fujiwara, et al. , Opt. Express 21, 31395 (2013)

    work page 2013

  38. [38]

    Rashleigh, J

    S. Rashleigh, J. Light. T echnol. 1, 312 (1983)

    work page 1983

  39. [39]

    Chapter 6 - Polarization Effects,

    G. P . Agrawal, “Chapter 6 - Polarization Effects, ” inNonlinear Fiber Op- tics (Fifth Edition), G. Agrawal, ed. (Academic Press, Boston, 2013), Optics and Photonics, pp. 193–244

    work page 2013

  40. [40]

    Y .-Y . Ding, H. Chen, S. Wang,et al., Opt. Express 25, 27923 (2017)

    work page 2017

  41. [41]

    Brodsky , N

    M. Brodsky , N. J. Frigo, M. Boroditsky , and M. T ur, J. Light. T echnol. 24, 4584 (2006)

    work page 2006

  42. [42]

    Amies-King, K

    B. Amies-King, K. P . Schatz, H. Duan, et al., Entropy 25 (2023)

    work page 2023

  43. [43]

    Rubenok, J

    A. Rubenok, J. A. Slater, P . Chan, et al., Phys. Rev. Lett. 111, 130501 (2013)

    work page 2013

  44. [44]

    D.-D. Li, S. Gao, G.-C. Li, et al., Opt. Express 26, 22793 (2018)

    work page 2018

  45. [45]

    Yin, T .-W

    S.-H. Yin, T .-W. Luo, W.-J. Jiang, et al. , Opt. Express 33, 38431 (2025)

    work page 2025

  46. [46]

    Wengerowsky , S

    S. Wengerowsky , S. K. Joshi, F . Steinlechner, et al. , npj Quantum Inf. 6, 5 (2020)

    work page 2020

  47. [47]

    Perani, M

    M. Perani, M. Clark, R. Wang, et al., EPJ Quantum T echnol.10 (2023)

    work page 2023

  48. [48]

    Kucera, C

    S. Kucera, C. Haen, E. Arenskötter, et al. , npj Quantum Inf. 10, 88 (2024)

    work page 2024

  49. [49]

    Y . Shi, H. S. Poh, A. Ling, and C. Kurtsiefer, Opt. Express 29, 37075 (2021)

    work page 2021

  50. [50]

    S. P . Neumann, A. Buchner, L. Bulla, et al. , Nat. Commun. 13, 6134 (2022)

    work page 2022

  51. [51]

    In situ quan- tum verification of polarization-stabilized optical channels,

    M. L. Stevens, N. I. Wasserbeck, Z. Goisman, et al. , “In situ quan- tum verification of polarization-stabilized optical channels, ” (2025). ArXiv:2510.26034 [quant-ph]

    work page arXiv 2025

  52. [52]

    Y . T an, J. Wang, J. Wu, and Z. He, Commun. Eng. 3, 57 (2024)

    work page 2024

  53. [53]

    G. B. Xavier, N. Walenta, G. Vilela De Faria, et al. , New J. Phys. 11, 045015 (2009)

    work page 2009

  54. [54]

    Continuous Automatic Polarization Channel Stabilization from Heterodyne Detection of Coex- isting Dim Reference Signals,

    J. C. Chapman, M. Alshowkan, K. Reaz, et al., “Continuous Automatic Polarization Channel Stabilization from Heterodyne Detection of Coex- isting Dim Reference Signals, ” (2024). ArXiv:2411.15135 [quant-ph]

    work page arXiv 2024

  55. [55]

    A. N. Craddock, A. Lazenby , G. B. Portmann, et al. , PRX Quantum 5 (2024)

    work page 2024

  56. [56]

    Zhang, R

    Y . Zhang, R. Broberg, A. Zhu, et al., Science 389, 940 (2025)

    work page 2025

  57. [57]

    Entanglement Distribution over a Polarization-Stabilized Aerial Fiber,

    Y . Shi, J. Su, A. Rahmouni, et al. , “Entanglement Distribution over a Polarization-Stabilized Aerial Fiber, ” (2026). ArXiv:2601.11753 [quant- ph] version: 1

    work page arXiv 2026

  58. [58]

    Properties of Polarization-Dependent Loss and Polarization-Mode Dispersion,

    “Properties of Polarization-Dependent Loss and Polarization-Mode Dispersion, ” in Polarization Optics in T elecommunications, J. N. Damask, ed. (Springer, New Y ork, NY , 2005), pp. 297–384

    work page 2005

  59. [59]

    Polarization Mode Dis- persion Mitigation using Dual-Wavelength Headers in Quantum Wrap- per Networks,

    J. v. Howe, G. Gul, G. S. Kanter, and P . Kumar, “Polarization Mode Dis- persion Mitigation using Dual-Wavelength Headers in Quantum Wrap- per Networks, ” inFrontiers in Optics + Laser Science 2025 (FiO, LS) (2025), paper JW4A.15, (Optica Publishing Group, 2025), p. JW4A.15

    work page 2025

  60. [60]

    Polarization-Mode Dis- persion,

    H. Kogelnik, R. M. Jopson, and L. E. Nelson, “Polarization-Mode Dis- persion, ” inOptical Fiber T elecommunications IV-B, (Academic Press, 2002), pp. 725–861

    work page 2002

  61. [61]

    Direct T racking of State-of- Polarization Fluctuations in Fiber due to Polarization Mode Dispersion Using Machine Learning,

    E. Eastman, H. Liu, A. Ramesh, et al. , “Direct T racking of State-of- Polarization Fluctuations in Fiber due to Polarization Mode Dispersion Using Machine Learning, ” inFrontiers in Optics + Laser Science 2025 (FiO, LS) (2025), paper JW5A.9, (Optica Publishing Group, 2025), p. JW5A.9

    work page 2025

  62. [62]

    N. P . Schnoor, R. C. Niemeier, A. L. Woods, and J. D. Rogers, Appl. Opt. 59, 10673 (2020)

    work page 2020

  63. [63]

    T akesue and K

    H. T akesue and K. Shimizu, Opt. Commun. 283, 276 (2010)

    work page 2010

  64. [64]

    T akeoka, R.-B

    M. T akeoka, R.-B. Jin, and M. Sasaki, New J. Phys. 17, 043030 (2015)

    work page 2015

  65. [65]

    R. A. Brewster, G. Baumgartner, and Y . K. Chembo, Phys. Rev. A 104, 022411 (2021)

    work page 2021