Zobrazeno 1 - 10
of 349
pro vyhledávání: '"Christandl Matthias"'
The optimal rate of reliable communication over a quantum channel can be enhanced by pre-shared entanglement. Whereas the enhancement may be unbounded in infinite-dimensional settings even when the input power is constrained, a long-standing conjectu
Externí odkaz:
http://arxiv.org/abs/2408.17290
Usual scenarios of fault-tolerant computation are concerned with the fault-tolerant realization of quantum algorithms that compute classical functions, such as Shor's algorithm for factoring. In particular, this means that input and output to the qua
Externí odkaz:
http://arxiv.org/abs/2408.05260
Autor:
Erakovic, Mihael, Witteveen, Freek, Harley, Dylan, Günther, Jakob, Bensberg, Moritz, Meitei, Oinam Romesh, Cho, Minsik, Van Voorhis, Troy, Reiher, Markus, Christandl, Matthias
Quantum computers can accurately compute ground state energies using phase estimation, but this requires a guiding state which has significant overlap with the true ground state.For large molecules and extended materials, it becomes difficult to find
Externí odkaz:
http://arxiv.org/abs/2408.01940
We study the perfect transfer of information in 1+1D continuous quantum systems. This includes effective descriptions of inhomogeneous spin chains, for which the notion of perfect state transfer in quantum information was introduced, and here phrased
Externí odkaz:
http://arxiv.org/abs/2408.00723
Autor:
Allerstorfer, Rene, Bluhm, Andreas, Buhrman, Harry, Christandl, Matthias, Escolà-Farràs, Llorenç, Speelman, Florian, Lunel, Philip Verduyn
Signal loss poses a significant threat to the security of quantum cryptography when the chosen protocol lacks loss-tolerance. In quantum position verification (QPV) protocols, even relatively small loss rates can compromise security. The goal is thus
Externí odkaz:
http://arxiv.org/abs/2312.12614
Autor:
Christandl, Matthias
Publikováno v:
PNAS Nexus, Volume 3, Issue 9, September 2024, pgae254 (2024)
A tensor is a multidimensional array of numbers that can be used to store data, encode a computational relation and represent quantum entanglement. In this sense a tensor can be viewed as valuable resource whose transformation can lead to an understa
Externí odkaz:
http://arxiv.org/abs/2311.02190
Autor:
Allerstorfer, Rene, Christandl, Matthias, Grinko, Dmitry, Nechita, Ion, Ozols, Maris, Rochette, Denis, Lunel, Philip Verduyn
We investigate the extent to which two particles can be maximally entangled when they are also similarly entangled with other particles on a complete graph, focusing on Werner, isotropic, and Brauer states. To address this, we formulate and solve opt
Externí odkaz:
http://arxiv.org/abs/2309.16655
Publikováno v:
Phys. Rev. Res. 6, 043021 (2024)
Quantum computation is one of the most promising new paradigms for the simulation of physical systems composed of electrons and atomic nuclei, with applications in chemistry, solid-state physics, materials science, and molecular biology. This require
Externí odkaz:
http://arxiv.org/abs/2308.16873
Autor:
Christandl, Matthias, Lysikov, Vladimir, Steffan, Vincent, Werner, Albert H., Witteveen, Freek
Tensor networks provide succinct representations of quantum many-body states and are an important computational tool for strongly correlated quantum systems. Their expressive and computational power is characterized by an underlying entanglement stru
Externí odkaz:
http://arxiv.org/abs/2307.07394
Autor:
Harley, Dylan, Datta, Ishaun, Klausen, Frederik Ravn, Bluhm, Andreas, França, Daniel Stilck, Werner, Albert H., Christandl, Matthias
Publikováno v:
Nat. Commun. 15, 6527 (2024)
Quantum hardware has the potential to efficiently solve computationally difficult problems in physics and chemistry to reap enormous practical rewards. Analogue quantum simulation accomplishes this by using the dynamics of a controlled many-body syst
Externí odkaz:
http://arxiv.org/abs/2306.13739