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pro vyhledávání: '"Facchi, A."'
In analog and digital simulations of practically relevant quantum systems, the target dynamics can only be implemented approximately. The Trotter product formula is the most common approximation scheme as it is a generic method which allows tuning ac
Externí odkaz:
http://arxiv.org/abs/2410.03059
Autor:
Viggiano, Viviana, Bachelard, Romain, Cunden, Fabio Deelan, Facchi, Paolo, Kaiser, Robin, Pascazio, Saverio, Pepe, Francesco V., Scardicchio, Antonello
In the collective photon emission from atomic clouds both the atomic transition frequency and the decay rate are modified compared to a single isolated atom, leading to the effects of superradiance and subradiance. In this Letter, we analyse the prop
Externí odkaz:
http://arxiv.org/abs/2407.11858
Achieving the ultimate quantum precision in the estimation of multiple physical parameters simultaneously is a challenge in quantum metrology due to fundamental limitations and experimental challenges in harnessing the necessary quantum resources. We
Externí odkaz:
http://arxiv.org/abs/2405.17115
It is demonstrated a two-photon interfering technique based on polarization-resolved measurements for the simultaneous estimation with the maximum sensitivity achievable in nature of multiple parameters associated with the polarization state of two i
Externí odkaz:
http://arxiv.org/abs/2405.12870
Publikováno v:
Journal of Physics A: Mathematical and Theoretical 57, 425304 (2024)
We consider a non-relativistic particle in a one-dimensional box with all possible quantum boundary conditions that make the kinetic-energy operator selfadjoint. We determine the Wigner functions of the corresponding eigenfunctions and analyze in det
Externí odkaz:
http://arxiv.org/abs/2404.17430
Autor:
Amato, Daniele, Facchi, Paolo
Publikováno v:
Sci. Rep. 14, 14366 (2024)
We prove sharp universal upper bounds on the number of steady and asymptotic states of discrete- and continuous-time Markovian evolutions of open quantum systems. We show that the bounds depend only on the dimension of the system and not on the detai
Externí odkaz:
http://arxiv.org/abs/2404.00440
In this Article we analyze the algebraic properties of the asymptotic dynamics of finite-dimensional open quantum systems in the Heisenberg picture. In particular, a natural product (Choi-Effros product) can be defined in the asymptotic regime. Motiv
Externí odkaz:
http://arxiv.org/abs/2403.12926
Publikováno v:
Phys. Rev. Research 6, L042011 (2024)
The product of two unitaries can normally be expressed as a single exponential through the famous Baker-Campbell-Hausdorff formula. We present here a counterexample in quantum optics, by showing that an expression in terms of a single exponential is
Externí odkaz:
http://arxiv.org/abs/2402.17114
Publikováno v:
Physical Review Research 6, L032017 (2024)
Waveguide quantum electrodynamics represents a powerful platform to generate entanglement and tailor photonic states. We consider a pair of identical qubits coupled to a parity invariant waveguide in the microwave domain. By working in the one- and t
Externí odkaz:
http://arxiv.org/abs/2402.01286
Efficient error estimates for the Trotter product formula are central in quantum computing, mathematical physics, and numerical simulations. However, the Trotter error's dependency on the input state and its application to unbounded operators remains
Externí odkaz:
http://arxiv.org/abs/2312.08044