Interface between Trapped-Ion Qubits and Traveling Photons with Close-to-Optimal Efficiency

Schupp, Josef; Krcmarsky, Vojtech; Krutyanskiy, V. L.; Meraner, Martin; Northup, Tracy E.; Lanyon, B. P.

doi:10.1103/prxquantum.2.020331

Cited by 57 publications

(28 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, there is a trade-off between the event rate and distance and one would have to prioritise distance over finite-key security (or vice versa). To address this issue for the current setup, it is possible to scale up the number of atom traps using multi-dimensional arrays [43][44][45], which combined with time multiplexing techniques [46] could increase the event rate by several orders of magnitude.…”

Section: Discussion and Outlookmentioning

confidence: 99%

Experimental device-independent quantum key distribution between distant users

Lim

Zhang

Leent

et al. 2021

Preprint

View full text Add to dashboard Cite

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 loophole-free Bell test with very high quality entanglement and detection efficiency across two remote locations to ensure secure key exchange. Here, we demonstrate for the first time the distribution of a secure key, based on asymptotic security estimates, in a fully device-independent way between two users separated by 400 metres. The experiment is based on heralded entanglement between two independently trapped single Rubidium 87 atoms. The implementation of a robust DIQKD protocol indicates an expected secret key rate of r=0.07 per entanglement generation event. Furthermore, we analyse the experiment’s capability to distribute a secret key with finite-size security against collective attacks.

show abstract

Section: Discussion and Outlookmentioning

confidence: 99%

Experimental device-independent quantum key distribution between distant users

Lim

Zhang

Leent

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…The energy levels of the ions can be used to define qubits, and these qubits can be manipulated by driving them with laser pulses. Trapped ions have properties that would make them suitable to implement a factory node, such as long coherence times [80][81][82], high-fidelity state preparation and readout [83][84][85], and a good optical interface [7,[86][87][88][89][90][91] that has allows for the generation of entanglement with remote nodes [61,62,92].…”

Section: A Trapped Ionsmentioning

confidence: 99%

Analysis of Multipartite Entanglement Distribution using a Central Quantum-Network Node

Avis¹,

Rozpędek²,

Wehner³

2022

Preprint

View full text Add to dashboard Cite

“…Trapped ion systems, in which atomic ions are levitated in a vacuum by electric and/or magnetic field, are promising platform for the development of quantum technologies such as quantum metrology [1][2][3], quantum communication [4][5][6] and quantum computation [7][8][9]. Precise quantum operations on trapped ions as quantum bits (qubits) are indispensable ingredients for such a purpose.…”

Section: Introductionmentioning

confidence: 99%

Deterministic loading of a single strontium ion into a surface electrode trap using pulsed laser ablation

Osada

Noguchi

2022

J. Phys. Commun.

View full text Add to dashboard Cite

Trapped-ion quantum technologies have been developed for decades toward applications such as precision measurement, quantum communication and quantum computation. Coherent manipulation of ions' oscillatory motions in an ion trap is important for quantum information processing by ions, however, unwanted decoherence caused by fluctuating electric-field environment often hinders stable and high-fidelity operations.. One way to avoid this is to adopt pulsed laser ablation for ion loading, a loading method with significantly reduced pollution and heat production. Despite the usefulness of the ablation loading such as the compatibility with cryogenic environment, randomness of the number of loaded ions is still problematic in realistic applications where definite number of ions are preferably loaded with high probability. %The ablation loading is proven to be useful, being even compatible with cryogenic environment, except for the randomness of the number of loaded ions. In this paper, we demonstrate an efficient loading of a single strontium ion into a surface electrode trap generated by laser ablation and successive photoionization. The probability of single-ion loading into a surface electrode trap is measured to be 82\,\%, and such a deterministic single-ion loading allows for loading ions into the trap one-by-one. Our results open up a way to develop more functional ion-trap quantum devices by the clean, stable, and deterministic ion loading.

show abstract

Interface between Trapped-Ion Qubits and Traveling Photons with Close-to-Optimal Efficiency

Cited by 57 publications

References 62 publications

Experimental device-independent quantum key distribution between distant users

Experimental device-independent quantum key distribution between distant users

Analysis of Multipartite Entanglement Distribution using a Central Quantum-Network Node

Deterministic loading of a single strontium ion into a surface electrode trap using pulsed laser ablation

Contact Info

Product

Resources

About