Zobrazeno 1 - 10
of 370
pro vyhledávání: '"Paunković N"'
Autor:
Paunković, Nebojša1, Paunković, Džejn1
Publikováno v:
Timocki Medicinski Glasnik. 2024, Vol. 49 Issue 3/4, p1-6. 6p.
The fidelity between two infinitesimally close states or the fidelity susceptibility of a system are known to detect quantum phase transitions. Here we show that the k-space fidelity between two states far from each other and taken deep inside (bulk)
Externí odkaz:
http://arxiv.org/abs/1808.06187
Publikováno v:
Phys. Rev. B 98, 245141 (2018)
We study the behaviour of the fidelity and the Uhlmann connection in two-dimensional systems of free fermions that exhibit non-trivial topological behavior. In particular, we use the fidelity and a quantity closely related to the Uhlmann factor in or
Externí odkaz:
http://arxiv.org/abs/1803.05021
Publikováno v:
Entropy 21, 821 (2019)
We present a quantum scheme for signing contracts between two clients (Alice and Bob) using entangled states and the services of a third trusted party (Trent). The trusted party is only contacted for the initialization of the protocol, and possibly a
Externí odkaz:
http://arxiv.org/abs/1711.09843
In this paper we present quantum key distribution protocol that, instead of single qubits, uses mesoscopic coherent states of light $|\alpha\rangle$ to encode bit values of a randomly generated key. Given the reference value $\alpha\in\mathbb C$, and
Externí odkaz:
http://arxiv.org/abs/1609.07064
Publikováno v:
International Journal of Quantum Information, Vol. 13, No. 6 (2015) 1550050
Quantum Cryptography is a rapidly developing field of research that benefits from the properties of Quantum Mechanics in performing cryptographic tasks. Quantum walks are a powerful model for quantum computation and very promising for quantum informa
Externí odkaz:
http://arxiv.org/abs/1602.01404
Publikováno v:
Journal of Physics A: Mathematical and Theoretical, Volume 50, Number 20, 2017
We present a bit-string quantum oblivious transfer protocol based on single-qubit rotations. Our protocol is built upon a previously proposed quantum public-key protocol and its practical security relies on the laws of Quantum Mechanics. Practical se
Externí odkaz:
http://arxiv.org/abs/1407.8146
Oblivious transfer protocol is a basic building block in cryptography and is used to transfer information from a sender to a receiver in such a way that, at the end of the protocol, the sender does not know if the receiver got the message or not. Sin
Externí odkaz:
http://arxiv.org/abs/1403.6022
Publikováno v:
In Annals of Physics February 2019 401:40-58
Publikováno v:
Physical Review A 84, 062318 (2011)
Quantum fidelity between two density matrices, $F(\rho_1,\rho_2)$ is usually defined as the trace of the operator ${\cal F}=\sqrt{\sqrt{\rho_1} \rho_2 \sqrt{\rho_1}}$. We study the logarithmic spectrum of this operator, which we denote by {\it fideli
Externí odkaz:
http://arxiv.org/abs/1107.5931