Zobrazeno 1 - 10
of 144
pro vyhledávání: '"Poggi, A. M."'
Publikováno v:
Phys. Rev. Lett. 132, 193801 (2024)
We study the robustness of the evolution of a quantum system against small uncontrolled variations in parameters in the Hamiltonian. We show that the fidelity susceptibility, which quantifies the perturbative error to leading order, can be expressed
Externí odkaz:
http://arxiv.org/abs/2309.14437
Publikováno v:
Phys. Rev. Research 6, 013309 (2024)
The dynamical spreading of quantum information through a many-body system, typically called scrambling, is a complex process that has proven to be essential to describe many properties of out-of-equilibrium quantum systems. Scrambling can, in princip
Externí odkaz:
http://arxiv.org/abs/2305.16992
Publikováno v:
Quantum 8, 1229 (2024)
We study the competing effects of collective generalized measurements and interaction-induced scrambling in the dynamics of an ensemble of spin-1/2 particles at the level of quantum trajectories. This setup can be considered as analogous to the one l
Externí odkaz:
http://arxiv.org/abs/2305.10209
As noisy intermediate-scale quantum (NISQ) processors increase in size and complexity, their use as general purpose quantum simulators will rely on algorithms based on the Trotter-Suzuki expansion. We run quantum simulations on a small, highly accura
Externí odkaz:
http://arxiv.org/abs/2212.03843
Publikováno v:
Phys. Rev. A 107, 032418 (2023)
Scrambling is a key concept in the analysis of nonequilibrium properties of quantum many-body systems. Most studies focus on its characterization via out-of-time-ordered correlation functions (OTOCs), particularly through the early-time decay of the
Externí odkaz:
http://arxiv.org/abs/2211.15872
We revisit well-known protocols in quantum metrology using collective spins and propose a unifying picture for optimal state preparation based on a semiclassical description in phase space. We show how this framework allows for quantitative predictio
Externí odkaz:
http://arxiv.org/abs/2211.01250
Publikováno v:
Phys. Rev. Research 4, 023018 (2022)
We show the emergence of Floquet time crystal (FTC) phases in the Floquet dynamics of periodically driven $p$-spin models, which describe a collection of spin-1/2 particles with all-to-all $p$-body interactions. Given the mean-field nature of these m
Externí odkaz:
http://arxiv.org/abs/2201.10692
Publikováno v:
PRX Quantum 3, 010351 (2022)
We study the behavior of errors in the quantum simulation of spin systems with long-range multi-body interactions resulting from the Trotter-Suzuki decomposition of the time-evolution operator. We identify a regime where the Floquet operator underlyi
Externí odkaz:
http://arxiv.org/abs/2110.03568
Publikováno v:
PRX Quantum 2, 040349 (2021)
When is the quantum speed limit (QSL) really quantum? While vanishing QSL times often indicate emergent classical behavior, it is still not entirely understood what precise aspects of classicality are at the origin of this dynamical feature. Here, we
Externí odkaz:
http://arxiv.org/abs/2107.06318
Publikováno v:
Phys. Rev. Research 3, 033145 (2021)
We study how chaos, introduced by a weak perturbation, affects the reliability of the output of analog quantum simulation. As a toy model, we consider the Lipkin-Meshkov-Glick (LMG) model. Inspired by the semiclassical behavior of the order parameter
Externí odkaz:
http://arxiv.org/abs/2103.02714