Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Stefanie Barz"'
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-9 (2023)
Abstract We test the quantumness of IBM’s quantum computer IBM Quantum System One in Ehningen, Germany. We generate generalised n-qubit GHZ states and measure Bell inequalities to investigate the n-party entanglement of the GHZ states. The implemen
Externí odkaz:
https://doaj.org/article/d98cdd743c34476cab6362a838ed6eda
Publikováno v:
Physical Review Research, Vol 5, Iss 3, p 033222 (2023)
Multipartite entanglement enables secure and anonymous key exchange between multiple parties in a network. Greenberger-Horne-Zeilinger states have been introduced as resource states for anonymous key exchange protocols, in which an anonymous subset o
Externí odkaz:
https://doaj.org/article/d3f2908730fc4284ae2ce05a037ddf09
Publikováno v:
npj Quantum Information, Vol 7, Iss 1, Pp 1-8 (2021)
Abstract Quantum correlations are central to the foundations of quantum physics and form the basis of quantum technologies. Here, our goal is to connect quantum correlations and computation: using quantum correlations as a resource for computation—
Externí odkaz:
https://doaj.org/article/f371d1955fbf4ec6a368260b97eb1dd4
Publikováno v:
New Journal of Physics, Vol 25, Iss 7, p 073007 (2023)
Non-locality is not only one of the most prominent quantum features but can also serve as a resource for various information-theoretical tasks. Analysing it from an information-theoretical perspective has linked it to applications such as non-adaptiv
Externí odkaz:
https://doaj.org/article/e31e4a27572242638f953103873f6028
Publikováno v:
New Journal of Physics, Vol 25, Iss 6, p 063027 (2023)
Multipartite entanglement plays a central role in optical quantum technologies. One way to entangle two photons is to prepare them in orthogonal internal states, for example, in two polarisations, and then send them through a balanced beam splitter.
Externí odkaz:
https://doaj.org/article/d8265eb7614346c3ba9f82eb56fbf7df
Autor:
Raphael Nold, Charles Babin, Joel Schmidt, Tobias Linkewitz, María T. Pérez Zaballos, Rainer Stöhr, Roman Kolesov, Vadim Vorobyov, Daniil M. Lukin, Rüdiger Boppert, Stefanie Barz, Jelena Vučković, J. Christof M. Gebhardt, Florian Kaiser, Jörg Wrachtrup
Publikováno v:
PRX Quantum, Vol 3, Iss 2, p 020358 (2022)
The ability to perform high-precision optical measurements is paramount in science and engineering. Laser interferometry enables interaction-free sensing with a precision ultimately limited by shot noise. Quantum optical sensors can surpass this limi
Externí odkaz:
https://doaj.org/article/24c1c6ae52e84ce8a2bd30e365a05b13
Publikováno v:
New Journal of Physics, Vol 23, Iss 8, p 083026 (2021)
Secure communication is one of the key applications of quantum networks. In recent years, following the demands for identity protection in classical communication protocols, the need for anonymity has also emerged for quantum networks. Here, we demon
Externí odkaz:
https://doaj.org/article/5cb692ccb83240a4aaaf08d10b054bab
Publikováno v:
New Journal of Physics, Vol 20, Iss 10, p 103016 (2018)
Quantum cryptography is information-theoretically secure owing to its solid basis in quantum mechanics. However, generally, initial implementations with practical imperfections might open loopholes, allowing an eavesdropper to compromise the security
Externí odkaz:
https://doaj.org/article/ebf1f2eab15e4068ba7d1c8d7d8ec052
Publikováno v:
New Journal of Physics, Vol 18, Iss 1, p 013020 (2016)
Blind quantum computing allows for secure cloud networks of quasi-classical clients and a fully fledged quantum server. Recently, a new protocol has been proposed, which requires a client to perform only measurements. We demonstrate a proof-of-princi
Externí odkaz:
https://doaj.org/article/85b1891e6531482aa4c4c962e7e68d7e
Autor:
Stefanie Barz, Borivoje Dakić, Yannick Ole Lipp, Frank Verstraete, James D. Whitfield, Philip Walther
Publikováno v:
Physical Review X, Vol 5, Iss 2, p 021010 (2015)
Much of the anticipation accompanying the development of a quantum computer relates to its application to simulating dynamics of another quantum system of interest. Here, we study the building blocks for simulating quantum spin systems with linear op
Externí odkaz:
https://doaj.org/article/1ab7944280f548859ad7f8758901c832