Zobrazeno 1 - 10
of 56
pro vyhledávání: '"Mišta Jr., Ladislav"'
The quantum rotor represents, after the harmonic oscillator, the next obvious quantum system to study the complementary pair of variables: the angular momentum and the unitary shift operator in angular momentum. Proper quantification of uncertainties
Externí odkaz:
http://arxiv.org/abs/2403.02498
Autor:
Leskovjanová, Olga, Mišta Jr, Ladislav
We derive a set of genuine multi-mode entanglement criteria for second moments of the quadrature operators. The criteria have a common form of the uncertainty relation between sums of variances of position and momentum quadrature combinations. A uniq
Externí odkaz:
http://arxiv.org/abs/2401.04376
Multi-copy activation of genuine multipartite entanglement (GME) is a phenomenon whereby multiple copies of biseparable but fully inseparable states can exhibit GME. This was shown to be generically possible in finite dimensions. Here, we extend this
Externí odkaz:
http://arxiv.org/abs/2312.16570
Reaching ultimate performance of quantum technologies requires the use of detection at quantum limits and access to all resources of the underlying physical system. We establish a full quantum analogy between the pair of angular momentum and exponent
Externí odkaz:
http://arxiv.org/abs/2201.02231
Autor:
Nordgren, Viktor, Leskovjanová, Olga, Provazník, Jan, Korolkova, Natalia, Mišta Jr., Ladislav
Genuine multipartite entanglement underlies correlation experiments corroborating quantum mechanics and it is an expedient empowering many quantum technologies. One of many counterintuitive facets of genuine multipartite entanglement is its ability t
Externí odkaz:
http://arxiv.org/abs/2103.07327
Publikováno v:
Phys. Rev. Research 5, 033153 (2023)
We establish fundamental upper bounds on the amount of secret key that can be extracted from quantum Gaussian states by using only local Gaussian operations, local classical processing, and public communication. For one-way public communication, or w
Externí odkaz:
http://arxiv.org/abs/2010.15729
Publikováno v:
Optica 6, 896-901 (2019)
We prove experimentally the predicted existence of a three-qubit quantum state with genuine multipartite entanglement which can be certified solely from its separable two-qubit reduced density matrices. The qubits are encoded into different degrees o
Externí odkaz:
http://arxiv.org/abs/2008.01599
Autor:
Amiri, Ryan, Stárek, Robert, Reichmuth, David, Puthoor, Ittoop V, Mičuda, Michal, Mišta Jr, Ladislav, Dušek, Miloslav, Wallden, Petros, Andersson, Erika
Publikováno v:
PRX Quantum 2, 010335 (2021)
Oblivious transfer is an important primitive in modern cryptography. Applications include secure multiparty computation, oblivious sampling, e-voting, and signatures. Information-theoretically secure perfect 1-out-of 2 oblivious transfer is impossibl
Externí odkaz:
http://arxiv.org/abs/2007.04712
Publikováno v:
Phys. Rev. A 99, 010104 (2019)
Distribution of quantum correlations among remote users is a key procedure underlying many quantum information technologies. Einstein-Podolsky-Rosen steering, which is one kind of such correlations stronger than entanglement, has been identified as a
Externí odkaz:
http://arxiv.org/abs/1801.08758
Autor:
Mišta Jr., Ladislav, Baksová, Klára
Publikováno v:
Phys. Rev. A 97, 012305 (2018)
We develop a theory of a quantifier of bipartite Gaussian entanglement called Gaussian intrinsic entanglement (GIE) which was proposed recently in [L. Mi\v{s}ta {\it et al.}, Phys. Rev. Lett. {\bf 117}, 240505 (2016)]. The GIE provides a compromise b
Externí odkaz:
http://arxiv.org/abs/1710.10809