Zobrazeno 1 - 10
of 493
pro vyhledávání: '"Andersen Ulrik L."'
Autor:
Nguyen, Huy Q., Derkach, Ivan, Hajomer, Adnan A. E., Chin, Hou-Man, Oruganti, Akash nag, Andersen, Ulrik L., Usenko, Vladyslav, Gehring, Tobias
Squeezed light plays a vital role in quantum information processing. By nature, it is highly sensitive, which presents significant practical challenges, particularly in remote detection, traditionally requiring complex systems such as active phase lo
Externí odkaz:
http://arxiv.org/abs/2411.07666
We extend the controlled displacement interaction between a qubit and a harmonic oscillator to the multi-qubit (qudit) case. We define discrete quadratures of the qudit and show how the qudit state can be displaced in these quadratures controlled by
Externí odkaz:
http://arxiv.org/abs/2410.22385
Autor:
Hajomer, Adnan A. E., Kanitschar, Florian, Jain, Nitin, Hentschel, Michael, Zhang, Runjia, Lütkenhaus, Norbert, Andersen, Ulrik L., Pacher, Christoph, Gehring, Tobias
Establishing secure data communication necessitates secure key exchange over a public channel. Quantum key distribution (QKD), which leverages the principles of quantum physics, can achieve this with information-theoretic security. The discrete modul
Externí odkaz:
http://arxiv.org/abs/2410.13702
Emitters of single-photons are essential resources for emerging quantum technologies and developed within different platforms including nonlinear optics, atomic and solid-state systems. The energy level structures of emission processes are critical f
Externí odkaz:
http://arxiv.org/abs/2407.13273
Autor:
Jain, Nitin, Chin, Hou-Man, Hajomer, Adnan A. E., Null, Dev, Larfort, Henrik, Nysom, Naja Lautrup, Bidstrup, Erik, Andersen, Ulrik L., Gehring, Tobias
We demonstrate a proof-of-concept establishment of quantum-secure data transfer links in field trials at two locations in Denmark: on the campus of Technical University of Denmark in Lyngby and between power grid nodes owned and operated by Energinet
Externí odkaz:
http://arxiv.org/abs/2402.18881
Autor:
Oh, Changhun, Chen, Senrui, Wong, Yat, Zhou, Sisi, Huang, Hsin-Yuan, Nielsen, Jens A. H., Liu, Zheng-Hao, Neergaard-Nielsen, Jonas S., Andersen, Ulrik L., Jiang, Liang, Preskill, John
Publikováno v:
Phys. Rev. Lett. 133, 230604 (2024)
We show that quantum entanglement can provide an exponential advantage in learning properties of a bosonic continuous-variable (CV) system. The task we consider is estimating a probabilistic mixture of displacement operators acting on $n$ bosonic mod
Externí odkaz:
http://arxiv.org/abs/2402.18809
Autor:
Hajomer, Adnan A. E., Derkach, Ivan, Filip, Radim, Andersen, Ulrik L., Usenko, Vladyslav C., Gehring, Tobias
Building scalable and secure quantum networks with many users has a high application potential but also holds many practical challenges. A significant stride in this pursuit involves extending quantum key distribution, an information-theoretically se
Externí odkaz:
http://arxiv.org/abs/2402.16044
Autor:
Nielsen, Jens A. H., Kicinski, Mateusz, Arge, Tummas N., Vijayadharan, Kannan, Foldager, Jonathan, Borregaard, Johannes, Meyer, Johannes Jakob, Neergaard-Nielsen, Jonas S., Gehring, Tobias, Andersen, Ulrik L.
Variational quantum algorithms (VQAs) are hybrid quantum-classical approaches used for tackling a wide range of problems on noisy intermediate-scale quantum (NISQ) devices. Testing these algorithms on relevant hardware is crucial to investigate the e
Externí odkaz:
http://arxiv.org/abs/2312.13870
Autor:
Huck Alexander, Andersen Ulrik L.
Publikováno v:
Nanophotonics, Vol 5, Iss 3, Pp 483-495 (2016)
In recent years, the controlled coupling of single-photon emitters to propagating surface plasmons has been intensely studied, which is fueled by the prospect of a giant photonic nonlinearity on a nanoscaled platform. In this article, we will review
Externí odkaz:
https://doaj.org/article/65a5bc122180489dad6572a90c31fb71
Autor:
Nikolic, Dino Solar, Lupo, Cosmo, Zhang, Runjia, Rydberg, Tobias, Andersen, Ulrik L., Gehring, Tobias
Quantum random number generators (QRNGs) based on quadrature measurements of the vacuum have so far used balanced homodyne detection to obtain a source of high entropy. Here we propose a simple direct detection measurement scheme using only a laser a
Externí odkaz:
http://arxiv.org/abs/2310.02354