Realizing quantum nodes in space for cost-effective, global quantum communication: in-orbit results and next steps

Perumangatt, Chithrabhanu; Vergoossen, Tom; Lohrmann, Alexander; Sivasankaran, Srihari; Reezwana, Ayesha; Anwar, Ali; Sachidananda, Subash; Islam, Tanvirul; Ling, Alexander

doi:10.1117/12.2583934

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…The dark count rate will slowly increase over time due to radiation damage in orbit. [ 64 ] Due to the flexibility of the operational concept of the module (i.e., adjustable cooling and overvoltage), the power consumption depends on the mode of operation with a peak power consumption of 12.5 W for saturation of all detectors and maximum cooling.…”

Section: Payload and System Designmentioning

confidence: 99%

QUICK3$^3$ ‐ Design of a Satellite‐Based Quantum Light Source for Quantum Communication and Extended Physical Theory Tests in Space

Ahmadi,

Schwertfeger,

Werner

et al. 2024

Adv Quantum Tech

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Modern quantum technologies have matured such that they can now be used in space applications, e.g., long‐distance quantum communication. Here, the design of a compact true single photon source is presented that can enhance the secure data rates in satellite‐based quantum key distribution scenarios compared to conventional laser‐based light sources. The quantum light source is a fluorescent color center in hexagonal boron nitride. The emitter is off‐resonantly excited by a diode laser and directly coupled to an integrated photonic processor that routes the photons to different experiments performed directly on‐chip: i) the characterization of the single photon source and ii) testing a fundamental postulate of quantum mechanics, namely the relation of the probability density and the wave function (known as Born's rule). The described payload is currently being integrated into a 3U CubeSat and scheduled to launch in 2024 into low Earth orbit. Therefore the feasibility of true single photon sources and reconfigurable photonic circuits in space can be evaluated. This provides a promising route toward a high‐speed quantum network.

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Section: Payload and System Designmentioning

confidence: 99%

QUICK3$^3$ ‐ Design of a Satellite‐Based Quantum Light Source for Quantum Communication and Extended Physical Theory Tests in Space

Ahmadi,

Schwertfeger,

Werner

et al. 2024

Adv Quantum Tech

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show abstract

“…For an environment near room temperature, we expect dark count rates below 1 kHz per detector prior to launch (depending on the overvoltage setting). The dark count rate will slowly increase over time due to radiation damage in orbit [61]. Due to the flexibility of the operational concept of the module (i.e., adjustable cooling and overvoltage), the power consumption depends on the mode of operation with a peak power consumption of 12.5 W for saturation of all detectors and maximum cooling.…”

Section: Single Photon Detectorsmentioning

confidence: 99%

QUICK$^3$ -- Design of a satellite-based quantum light source for quantum communication and extended physical theory tests in space

Ahmadi¹,

Schwertfeger²,

Werner³

et al. 2023

Preprint

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Modern quantum technologies have matured such that they can now be used in space applications, e.g., long-distance quantum communication. Here, we present the design of a compact true single photon source that can enhance the secure data rates in satellite-based quantum key distribution scenarios compared to conventional laser-based light sources. Our quantum light source is a fluorescent color center in hexagonal boron nitride. The emitter is off-resonantly excited by a diode laser and directly coupled to an integrated photonic processor that routes the photons to different experiments performed directly on-chip: (i) the characterization of the single photon source and (ii) testing a fundamental postulate of quantum mechanics, namely the relation of the probability density and the wave function (known as Born's rule). The described payload is currently being integrated into a 3U CubeSat and scheduled for launch in 2024 into low Earth orbit. We can therefore evaluate the feasibility of true single photon sources and reconfigurable photonic circuits in space. This provides a promising route toward a high-speed quantum network.

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“…The satellite quantum source generates polarizationentangled photon pairs by superposing orthogonally polarized photons created from spontaneous parametric down-conversion using two pump decay paths [18]. Detailed design of a functional model of the source and associated design trade-offs can be found in [19]. The source generates pairs of polarization-entangled photons where each pair consists of a 785 nm wavelength signal photon and an 837 nm wavelength idler photon.…”

Section: A System Configurationmentioning

confidence: 99%

Finite resource performance of small satellite-based quantum key distribution missions

Islam¹,

Sidhu²,

Higgins³

et al. 2022

Preprint

Self Cite

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In satellite-based quantum key distribution (QKD), the number of secret bits that can be generated in a single satellite pass over the ground station is severely restricted by the pass duration and the free-space optical channel loss. High channel loss may decrease the signal-to-noise ratio due to background noise, reduce the number of generated raw key bits, and increase the quantum bit error rate (QBER), all of which have detrimental effects on the output secret key length. Under finite-size security analysis, higher QBER increases the minimum raw key length necessary for non-zero key length extraction due to less efficient reconciliation and post-processing overheads. We show that recent developments in finite key analysis allow three different small-satellite-based QKD projects CQT-Sat, UK-QUARC-ROKS, and QEYSSat to produce secret keys even under very high loss conditions, improving on estimates based on older finite key bounds.

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Realizing quantum nodes in space for cost-effective, global quantum communication: in-orbit results and next steps

Cited by 6 publications

References 26 publications

QUICK3$^3$ ‐ Design of a Satellite‐Based Quantum Light Source for Quantum Communication and Extended Physical Theory Tests in Space

QUICK3$^3$ ‐ Design of a Satellite‐Based Quantum Light Source for Quantum Communication and Extended Physical Theory Tests in Space

QUICK$^3$ -- Design of a satellite-based quantum light source for quantum communication and extended physical theory tests in space

Finite resource performance of small satellite-based quantum key distribution missions

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