Zobrazeno 1 - 10
of 383
pro vyhledávání: '"Ortega, Adrian"'
Applying post selection in each step of an iterated protocol leads to sensitive quantum dynamics that may be utilized to test and benchmark current quantum computers. An example of this type of protocols was originally proposed for the task of matchi
Externí odkaz:
http://arxiv.org/abs/2410.07056
We study the spectrum, eigenstates and transport properties of a simple $\mathcal{P}\mathcal{T}$-symmetric model consisting in a finite, complex, square well potential with a delta potential at the origin. We show that as the strength of the delta po
Externí odkaz:
http://arxiv.org/abs/2410.00234
Autor:
Ortega, Adrian, Cushing, Christopher C
Publikováno v:
JMIR mHealth and uHealth, Vol 8, Iss 6, p e17450 (2020)
BackgroundCurrent digital health interventions primarily use interventionist-defined rules to guide the timing of intervention delivery. As new temporally dense data sets become available, it is possible to make decisions about the intervention timin
Externí odkaz:
https://doaj.org/article/e8b858acb9db46f4a607978e75e714b3
There are several definitions of energy density in quantum mechanics. These yield expressions that differ locally, but all satisfy a continuity equation and integrate to the value of the expected energy of the system under consideration. Thus, the qu
Externí odkaz:
http://arxiv.org/abs/2306.15999
We introduce the concept of K-th order chaoticity of unitaries, and analyze it for the case of two-level quantum systems. This property is relevant in a certain quantum random number generation scheme. We show that no unitaries exist with an arbitrar
Externí odkaz:
http://arxiv.org/abs/2211.04210
The presence of noise in quantum computers hinders their effective operation. Even though quantum error correction can theoretically remedy this problem, its practical realization is still a challenge. Testing and benchmarking noisy, intermediate-sca
Externí odkaz:
http://arxiv.org/abs/2210.09674
We study, analytically and numerically, a simple $\mathcal{PT}$-symmetric tight-binding ring with an onsite energy $a$ at the gain and loss sites. We show that if $a\neq 0$, the system generically exhibits an unbroken $\mathcal{PT}$-symmetric phase.
Externí odkaz:
http://arxiv.org/abs/2107.00286
We present a theoretical and numerical study of the competition between two opposite interference effects, namely interference-induced ballistic transport on one hand, and strong (Anderson) localization on the other. While the former effect allows fo
Externí odkaz:
http://arxiv.org/abs/2011.11813
We study the time evolution of a PT-symmetric, non-Hermitian quantum system for which the associated phase space is compact. We focus on the simplest non-trivial example of such a Hamiltonian, which is linear in the angular momentum operators. In ord
Externí odkaz:
http://arxiv.org/abs/2007.15732
Publikováno v:
J. Phys. A: Math. Theor., 53 (2020), 445308
We derive a continuity equation to study transport properties in a $\mathcal{PT}$-symmetric tight-binding chain with gain and loss in symmetric configurations. This allows us to identify the density fluxes in the system, and to define a transport coe
Externí odkaz:
http://arxiv.org/abs/1906.10116