Zobrazeno 1 - 10
of 353
pro vyhledávání: '"Deffner, Sebastian"'
Autor:
Deffner, Sebastian
Quantum thermometry refers to the study of measuring ultra-low temperatures in quantum systems. The precision of such a quantum thermometer is limited by the degree to which temperature can be estimated by quantum measurements. More precisely, the ma
Externí odkaz:
http://arxiv.org/abs/2408.16664
In the current era of noisy intermediate-scale quantum (NISQ) technology, quantum devices present new avenues for addressing complex, real-world challenges including potentially NP-hard optimization problems. This work aims to showcase how the inhere
Externí odkaz:
http://arxiv.org/abs/2406.11268
Simon's algorithm was one of the first problems to demonstrate a genuine quantum advantage. The algorithm, however, assumes access to noise-free qubits. In our work we use Simon's algorithm to benchmark the error rates of devices currently available
Externí odkaz:
http://arxiv.org/abs/2406.11771
Autor:
Hawary, Khadija El, Azzouz, Mohamed, Baz, Morad El, Deffner, Sebastian, Gardas, Bartłomiej, Mzaouali, Zakaria
Publikováno v:
Phys. Rev. E 110, 014120 (2024)
We demonstrate the unique capabilities of the Wigner function, particularly in its positive and negative parts, for exploring the phase diagram of the spin$-(\frac{1}{2\!}-\!\frac{1}{2})$ and spin$-(\frac{1}{2}\!-\!1)$ Ising-Heisenberg chains. We hig
Externí odkaz:
http://arxiv.org/abs/2405.02680
Autor:
Doucet, Emery, Deffner, Sebastian
Quantum Darwinism is a paradigm to understand how classically objective reality emerges from within a fundamentally quantum universe. Despite the growing attention that this field of research as been enjoying, it is currently not known what specific
Externí odkaz:
http://arxiv.org/abs/2405.00805
We consider the optimal control of switching on a coupling term between two quantum many-body systems. Specifically, we (i) quantify the energetic cost of establishing a weak junction between two quantum spin-$1/2$ chains in finite time $\tau$ and (i
Externí odkaz:
http://arxiv.org/abs/2404.10074
Publikováno v:
EPL 147 38002 (2024)
Commonly, the notion of "quantum chaos'' refers to the fast scrambling of information throughout complex quantum systems undergoing unitary evolution. Motivated by the Krylov complexity and the operator growth hypothesis, we demonstrate that the entr
Externí odkaz:
http://arxiv.org/abs/2404.03529
What is the minimal time until a quantum system can exhibit genuine quantum features? To answer this question we derive quantum speed limits for two-time correlation functions arising from statistics of measurements. Generally, these two-time correla
Externí odkaz:
http://arxiv.org/abs/2402.07582
Publikováno v:
Chaos 34, 043121 (2024)
It is a well-understood fact that the transport of excitations throughout a lattice is intimately governed by the underlying structures. Hence, it is only natural to recognize that also the dispersion of information has to depend on the lattice geome
Externí odkaz:
http://arxiv.org/abs/2401.08516
Autor:
Touil, Akram, Deffner, Sebastian
Publikováno v:
EPL (Europhys. Lett.) 146, 48001 (2024)
Recent advances in quantum information science have shed light on the intricate dynamics of quantum many-body systems, for which quantum information scrambling is a perfect example. Motivated by considerations of the thermodynamics of quantum informa
Externí odkaz:
http://arxiv.org/abs/2401.05305