Kai Redeker
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Long‐Distance Entanglement of Atomic Qubits Open
Quantum networks connecting future quantum computers and enabling efficient long-distance quantum communication require as most important resource the distribution of entanglement. This chapter details how this can be achieved for the part…
View article: A device-independent quantum key distribution system for distant users
A device-independent quantum key distribution system for distant users Open
Device-independent quantum key distribution (DIQKD) enables the generation of secret keys over an untrusted channel using uncharacterized and potentially untrusted devices 1–9 . The proper and secure functioning of the devices can be certi…
View article: Experimental device-independent quantum key distribution between distant users
Experimental device-independent quantum key distribution between distant users Open
Device-independent quantum key distribution (DIQKD) is the art of using untrusted devices to establish secret keys over an untrusted channel. So far, the real-world implementation of DIQKD remains a major challenge, as it requires a loopho…
View article: Experimental device-independent quantum key distribution between distant users
Experimental device-independent quantum key distribution between distant users Open
Device-independent quantum key distribution (DIQKD) is the art of using untrusted devices to establish secret keys over an untrusted channel. So far, the real-world implementation of DIQKD remains a major challenge, as it requires the demo…
View article: Certified randomness from a remote-state-preparation dimension witness
Certified randomness from a remote-state-preparation dimension witness Open
Randomness in Bell test data can be device-independently certified by Bell's\ntheorem without placing assumptions about the experimental devices. The\ndevice-independent randomness has very demanding requirement about the\nexperimental dev…
View article: Long-Distance Distribution of Atom-Photon Entanglement at Telecom Wavelength
Long-Distance Distribution of Atom-Photon Entanglement at Telecom Wavelength Open
Entanglement between stationary quantum memories and photonic channels is the essential resource for future quantum networks. Together with entanglement distillation, it will enable efficient distribution of quantum states. We report on th…
Device-independent certification of an elementary quantum network link Open
Device-independent characterization, also known as self-testing, provides a certification of devices from the result of a Bell test that is suitable for a wide range of applications. We here show that self-testing can be used in an element…
View article: Event-Ready Bell Test Using Entangled Atoms Simultaneously Closing Detection and Locality Loopholes
Event-Ready Bell Test Using Entangled Atoms Simultaneously Closing Detection and Locality Loopholes Open
An experimental test of Bell's inequality allows ruling out any local-realistic description of nature by measuring correlations between distant systems. While such tests are conceptually simple, there are strict requirements concerning the…