Fitzke, Erik ; Krebs, Robin ; Haase, Thorsten ; Mengler, Max ; Alber, Gernot ; Walther, Thomas (2022)
Time-dependent POVM reconstruction for single-photon avalanche photo diodes using adaptive regularization.
In: New Journal of Physics, 2022, 24 (2)
doi: 10.26083/tuprints-00020976
Artikel, Zweitveröffentlichung, Verlagsversion
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Kurzbeschreibung (Abstract)
We report on the first realization of time-dependent quantum detector tomography for commercially available InGaAs avalanche photo detectors. For the construction of appropriate time-dependent POVMs from experimentally measured data, we introduce a novel scheme to calculate the weight of the regularization term based on the amount of measured data. We compare our POVM-based results with the theoretical predictions of the previously developed model by Gouzien et al (2018 Phys. Rev. A 98 013833). In contrast to our measurement-based construction of a time-dependent POVM for photon detectors, this previous investigation extends a time-independent POVM to a time-dependent one by including effects of detector timing jitter and dead time on the basis of particular model assumptions concerning the inner physical mechanisms of a photon detector. Our experimental results demonstrate that this latter approach is not sufficient to completely describe the observable properties of our InGaAs avalanche photo detectors. Thus, constructing the time-dependent POVM of a detector by direct quantum tomographic measurements can reveal information about the detector’s interior that may not easily be included in time-independent POVMs by a priori model assumptions.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Fitzke, Erik ; Krebs, Robin ; Haase, Thorsten ; Mengler, Max ; Alber, Gernot ; Walther, Thomas |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Time-dependent POVM reconstruction for single-photon avalanche photo diodes using adaptive regularization |
| Sprache: | Englisch |
| Publikationsjahr: | 2022 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2022 |
| Verlag: | IOP Publishing |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | New Journal of Physics |
| Jahrgang/Volume einer Zeitschrift: | 24 |
| (Heft-)Nummer: | 2 |
| Kollation: | 16 Seiten |
| DOI: | 10.26083/tuprints-00020976 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/20976 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | We report on the first realization of time-dependent quantum detector tomography for commercially available InGaAs avalanche photo detectors. For the construction of appropriate time-dependent POVMs from experimentally measured data, we introduce a novel scheme to calculate the weight of the regularization term based on the amount of measured data. We compare our POVM-based results with the theoretical predictions of the previously developed model by Gouzien et al (2018 Phys. Rev. A 98 013833). In contrast to our measurement-based construction of a time-dependent POVM for photon detectors, this previous investigation extends a time-independent POVM to a time-dependent one by including effects of detector timing jitter and dead time on the basis of particular model assumptions concerning the inner physical mechanisms of a photon detector. Our experimental results demonstrate that this latter approach is not sufficient to completely describe the observable properties of our InGaAs avalanche photo detectors. Thus, constructing the time-dependent POVM of a detector by direct quantum tomographic measurements can reveal information about the detector’s interior that may not easily be included in time-independent POVMs by a priori model assumptions. |
| Freie Schlagworte: | quantum detector tomography, single-photon detector, avalanche photo diode, quantum communication, timing jitter, time-dependent POVM, SPAD |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-209768 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Fachbereich(e)/-gebiet(e): | 05 Fachbereich Physik 05 Fachbereich Physik > Institut für Angewandte Physik |
| Hinterlegungsdatum: | 11 Jul 2022 13:42 |
| Letzte Änderung: | 18 Jul 2022 09:15 |
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| Suche nach Titel in: | TUfind oder in Google |
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- Time-dependent POVM reconstruction for single-photon avalanche photo diodes using adaptive regularization. (deposited 11 Jul 2022 13:42) [Gegenwärtig angezeigt]
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