Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Chwedenczuk, Jan"'
Characterizing the non-classical correlations of a complex many-body system is an important part of quantum technologies. A versatile tool for such a task is one that scales well with the size of the system and which can be both easily computed and m
Externí odkaz:
http://arxiv.org/abs/2410.12487
The generation of many-body entangled states in atomic samples should be fast, as this process always involves a subtle interplay between desired quantum effects and unwanted decoherence. Here we identify a controllable and scalable catalyst that all
Externí odkaz:
http://arxiv.org/abs/2406.14461
Publikováno v:
Phys. Rev. A 110, 032428 (2024)
Many-body quantum systems can be characterised using the notions of \emph{k}-separability and entanglement depth. A quantum state is \emph{k}-separable if it can be expressed as a mixture of \emph{k} entangled subsystems, and its entanglement depth i
Externí odkaz:
http://arxiv.org/abs/2406.10662
The standard way to generate many-body quantum correlations is via a dynamical protocol: an initial product state is transformed by interactions that generate non-classical correlations at later times. Here, we show that many-body Bell correlations a
Externí odkaz:
http://arxiv.org/abs/2405.16974
Autor:
Wysocki, Piotr, Chwedeńczuk, Jan
The Lieb-Robinson bound (LRB) states that the range and strength of interactions between the constituents of a complex many-body system impose upper limits to how fast the signal can propagate. It manifests in a light cone-like growth of correlation
Externí odkaz:
http://arxiv.org/abs/2405.03751
Autor:
Hamza, Danish Ali, Chwedeńczuk, Jan
Bell correlations are among the most exotic phenomena through which quantum mechanics manifests itself. Their presence signals that the system can violate the postulates of local realism, once believed to be the nonnegotiable property of the physical
Externí odkaz:
http://arxiv.org/abs/2403.02383
Dynamical generation of strong and scalable quantum resources, like many-body entanglement and Bell correlations, in spin-$1/2$ chains, is possible with all-to-all interactions, either for constant interaction strength realizing one-axis twisting pro
Externí odkaz:
http://arxiv.org/abs/2306.06173
Publikováno v:
Phys. Rev. Lett. 129, 250402 (2022)
We demonstrate that the one-axis twisting (OAT), a versatile method of creating non-classical states of bosonic qubits, is a powerful source of many-body Bell correlations. We develop a fully analytical and universal treatment of the process, which a
Externí odkaz:
http://arxiv.org/abs/2206.10542
Autor:
Chwedenczuk, Jan
Since John Bell formulated his paramount inequality for a pair of spin-$1/2$ particles, quantum mechanics has been confronted with the postulates of local realism with various equivalent configurations. Current technology, with its advanced manipulat
Externí odkaz:
http://arxiv.org/abs/2109.15156
Autor:
Niezgoda, Artur, Chwedenczuk, Jan
Publikováno v:
Phys. Rev. Lett. 126, 210506 (2021)
We demonstrate that a many-body nonlocality is a resource for ultra-precise metrology. This result is achieved by linking the sensitivity of a quantum sensor with a combination of many-body correlation functions that witness the nonlocality. We illus
Externí odkaz:
http://arxiv.org/abs/2011.06612