| 1. |
- Argillander, Joakim, et al.
(author)
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Secure quantum random number generation with perovskite photonics
- 2024
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In: QUANTUM COMPUTING, COMMUNICATION, AND SIMULATION IV. - : SPIE-INT SOC OPTICAL ENGINEERING. - 9781510670839 - 9781510670822
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Conference paper (peer-reviewed)abstract
- In the field of cryptography, it is crucial that the random numbers used in key generation are not only genuinely random but also private, meaning that no other party than the legitimate user must have information about the numbers generated. Quantum random number generators can offer both properties - fundamentally random output, as well as the ability to implement generators that can certify the amount of private randomness generated, in order to remove some side-channel attacks. In this study we introduce perovskite technology as a resilient platform for photonics, where the resilience is owed to perovskite's ease of manufacturing. This has the potential to mitigate disruptions in the supply chain by enabling local and domestic manufacturing of photonic devices. We demonstrate the feasibility of the platform by implementing a measurement-device independent quantum random number generator based on perovskite LEDs.
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| 2. |
- Santagiustina, Francesco B. L., et al.
(author)
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Experimental post-selection loophole-free time-bin and energy-time nonlocality with integrated photonics
- 2024
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In: Optica. - : Optica Publishing Group. - 2334-2536. ; 11:4, s. 498-511
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Journal article (peer-reviewed)abstract
- Time-bin (TB) and energy-time (ET) entanglements are crucial resources for long-distance quantum information processing. However, their standard implementations suffer from the so-called post-selection loophole that allows for classical simulation and thus prevents quantum advantage. The post-selection loophole has been addressed in proof-of-principle experiments. An open problem though is to close it in real-life applications based on integrated technologies. This is especially important since, so far, all integrated sources of TB and ET entanglements suffer from the post-selection loophole. Here, we report post-selection loophole-free certification of TB or ET entanglement in integrated technologies, by implementing in a silicon nitride chip the "hug" scheme [Phys. Rev. Lett. 102, 040401 (2009)] and certifying genuine TB entanglement through the violation of a Bell inequality.
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