Zobrazeno 1 - 10
of 21
pro vyhledávání: '"René Schwonnek"'
Autor:
Antonio F. Rotundo, René Schwonnek
Publikováno v:
Physical Review Research, Vol 6, Iss 3, p 033043 (2024)
The entropic uncertainty principle in the form proven by Maassen and Uffink yields a fundamental inequality that is prominently used in many places all over the field of quantum information theory. In this paper, we provide a family of versatile gene
Externí odkaz:
https://doaj.org/article/6259a3db20bc4c8abfa2b77d9cdfd6a7
Publikováno v:
New Journal of Physics, Vol 26, Iss 7, p 073001 (2024)
The quantum alternating operator ansatz (QAOA) and its predecessor, the quantum approximate optimization algorithm, are one of the most widely used quantum algorithms for solving combinatorial optimization problems. However, as there is yet no rigoro
Externí odkaz:
https://doaj.org/article/3d3447e42f3e44e888d39317e601504a
Autor:
Ernest Y.-Z. Tan, René Schwonnek, Koon Tong Goh, Ignatius William Primaatmaja, Charles C.-W. Lim
Publikováno v:
npj Quantum Information, Vol 7, Iss 1, Pp 1-6 (2021)
Abstract Device-independent quantum key distribution (DIQKD) provides the strongest form of secure key exchange, using only the input–output statistics of the devices to achieve information-theoretic security. Although the basic security principles
Externí odkaz:
https://doaj.org/article/e91d991f1d0d4e348ed8bd86e59a99f1
Autor:
René Schwonnek, Koon Tong Goh, Ignatius W. Primaatmaja, Ernest Y.-Z. Tan, Ramona Wolf, Valerio Scarani, Charles C.-W. Lim
Publikováno v:
Nature Communications, Vol 12, Iss 1, Pp 1-8 (2021)
Device-independent quantum key distribution aims at the ultimate quantum-based unconditional security, but current protocols’ rates are quite far from anything practical. The authors’ protocol narrows this gap by using two randomly chosen key gen
Externí odkaz:
https://doaj.org/article/7ee9dee7781a4e98b8186fba5184a23b
Autor:
Ernest Y.-Z. Tan, Pavel Sekatski, Jean-Daniel Bancal, René Schwonnek, Renato Renner, Nicolas Sangouard, Charles C.-W. Lim
Publikováno v:
Quantum, Vol 6, p 880 (2022)
The security of finite-length keys is essential for the implementation of device-independent quantum key distribution (DIQKD). Presently, there are several finite-size DIQKD security proofs, but they are mostly focused on standard DIQKD protocols and
Externí odkaz:
https://doaj.org/article/b58975c747c4448b9ddf7de05a46f221
Autor:
René Schwonnek
Publikováno v:
Quantum, Vol 2, p 59 (2018)
We consider the uncertainty between two pairs of local projective measurements performed on a multipartite system. We show that the optimal bound in any linear uncertainty relation, formulated in terms of the Shannon entropy, is additive. This direct
Externí odkaz:
https://doaj.org/article/2a2d04d9343543fdb25d8f5f09b9f760
Publikováno v:
Mathematics, Vol 4, Iss 2, p 38 (2016)
Measurement uncertainty relations are lower bounds on the errors of any approximate joint measurement of two or more quantum observables. The aim of this paper is to provide methods to compute optimal bounds of this type. The basic method is semidefi
Externí odkaz:
https://doaj.org/article/feb65efb001647f283e846cd1779617f
Publikováno v:
New Journal of Physics, Vol 17, Iss 9, p 093046 (2015)
In this work we study various notions of uncertainty for angular momentum in the spin- s representation of SU(2). We characterize the ‘uncertainty regions’ given by all vectors, whose components are specified by the variances of the three angular
Externí odkaz:
https://doaj.org/article/d772b050843b4a7cbb55581436a7e830
Autor:
Wei Zhang, Tim van Leent, Kai Redeker, Robert Garthoff, René Schwonnek, Florian Fertig, Sebastian Eppelt, Wenjamin Rosenfeld, Valerio Scarani, Charles C.-W. Lim, Harald Weinfurter
Publikováno v:
Nature
Device-independent quantum key distribution (DIQKD) enables the generation of secret keys over an untrusted channel using uncharacterized and potentially untrusted devices1–9. The proper and secure functioning of the devices can be certified by a s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2cee765dcb348b92620214f9e77d47d
https://hdl.handle.net/21.11116/0000-000A-DEAC-B21.11116/0000-000A-DEAE-9
https://hdl.handle.net/21.11116/0000-000A-DEAC-B21.11116/0000-000A-DEAE-9
Autor:
Florian Fertig, Tim van Leent, Wei Zhang, Valerio Scarani, Sebastian Eppelt, Wenjamin Rosenfeld, Kai Redeker, Charles Ci Wen Lim, Robert Garthoff, René Schwonnek, Harald Weinfurter
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 Bel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6de61118d8753e85f3b6604fc353dc9
https://doi.org/10.21203/rs.3.rs-960507/v1
https://doi.org/10.21203/rs.3.rs-960507/v1