On-chip implementation of the probabilistic quantum optical state comparison amplifier

Canning, David W.; Donaldson, Ross J.; Mukherjee, Sebabrata; Collins, Robert J.; Mazzarella, Luca; Zanforlin, Ugo; Jeffers, John; Thomson, Robert R.; Buller, Gerald S.

doi:10.1364/oe.27.031713

Cited by 13 publications

(9 citation statements)

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“…This clearly indicates that the coupling interaction to the right and to the left single-mode waveguides are effectively opposite in sign, which is a direct proof for a negative coupling constant [15]. This system is also an example for a phase π beam splitter (π-BS), which could be quite useful for interferometric quantum optics [34,39,40], considering concatenated operations [30]. The output profile also coincides with the flat-band mode of a rhombic lattice [41], which is an important subject of research nowadays in photonic lattices.…”

Section: (B)-inset)mentioning

confidence: 78%

“…Without the demonstrated tuning mechanism, orthogonal states simply do not interact on a lattice and hybridized physics is simply not possible on a linear regime. The second outcome of our observation is the generation of a simple and concrete method for exciting higher-order spatial states inside a photonic chip, with perfect spatial controllability that can be a key of success for concatenated photonic operations [30][31][32][33][34][35].…”

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confidence: 98%

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Experimental observation of inter-orbital coupling

Guzmán-Silva,

Cáceres-Aravena,

Vicencio

2021

Preprint

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Section: (B)-inset)mentioning

confidence: 78%

mentioning

confidence: 98%

Experimental observation of inter-orbital coupling

Guzmán-Silva,

Cáceres-Aravena,

Vicencio

2021

Preprint

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“…The current challenge in chip-scale QKD is to integrate the detectors onto the chips alongside the other optical components. Chip scale transmitters are not as bright as bulk optic sources and chip scale receiver systems will often need single mode fibre/waveguide coupling [266]. Chip scale devices also do not solve the requirements of auxiliary systems such as fine pointing and beam expansion.…”

Section: Swap For Space Segmentmentioning

confidence: 99%

Advances in Space Quantum Communications

Sidhu,

Joshi,

Gundogan

et al. 2021

Preprint

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Concerted efforts are underway to establish an infrastructure for a global quantum internet to realise a spectrum of quantum technologies. This will enable more precise sensors, secure communications, and faster data processing. Quantum communications are a front-runner with quantum networks already implemented in several metropolitan areas. A number of recent proposals have modelled the use of space segments to overcome range limitations of purely terrestrial networks. Rapid progress in the design of quantum devices have enabled their deployment in space for in-orbit demonstrations. We review developments in this emerging area of space-based quantum technologies and provide a roadmap of key milestones towards a complete, global quantum networked landscape. Small satellites hold increasing promise to provide a cost effective coverage required to realised the quantum internet. We review the state of art in small satellite missions and collate the most current in-field demonstrations of quantum cryptography. We summarise important challenges in space quantum technologies that must be overcome and recent efforts to mitigate their effects. A perspective on future developments that would improve the performance of space quantum communications is included. We conclude with a discussion on fundamental physics experiments that could take advantage of a global, space-based quantum network.

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“…An integrated platform would be smaller but would require additional hardware to monitor the output. Such sources have been previously developed with small size, weight and power (SWaP) envelopes of the orders of 10 −4 m 3 , 10 −1 kg and < 1 W. They can be made to be monolithic, solid-state devices with further miniaturisation possible through integrated optics fabrication [53,54]; hence, the source can be accommodated in 1U. The main issues will be wavelength matching between different emitters to prevent side-channel leakage, modest temperature stability and reliability in the space environment; the latter is still to be proven [55].…”

Section: Payload Design and System Outlinementioning

confidence: 99%

QUARC: Quantum Research Cubesat—A Constellation for Quantum Communication

et al. 2020

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Quantum key distribution (QKD) offers future proof security based on fundamental laws of physics. Long-distance QKD spanning regions such as the United Kingdom (UK) may employ a constellation of satellites. Small satellites, CubeSats in particular, in low Earth orbit are a relatively low-cost alternative to traditional, large platforms. They allow the deployment of a large number of spacecrafts, ensuring greater coverage and mitigating some of the risk associated with availability due to cloud cover. We present our mission analysis showing how a constellation comprising 15 low-cost 6U CubeSats can be used to form a secure communication backbone for ground-based and metropolitan networks across the UK. We have estimated the monthly key rates at 43 sites across the UK, incorporating local meteorological data, atmospheric channel modelling and orbital parameters. We have optimized the constellation topology for rapid revisit and thus low-latency key distribution.

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On-chip implementation of the probabilistic quantum optical state comparison amplifier

Cited by 13 publications

References 50 publications

Experimental observation of inter-orbital coupling

Experimental observation of inter-orbital coupling

Advances in Space Quantum Communications

QUARC: Quantum Research Cubesat—A Constellation for Quantum Communication

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