Zobrazeno 1 - 10
of 149
pro vyhledávání: '"Rosas‐Ortiz, Oscar"'
We investigate entanglement in two-qubit systems using a geometric representation based on the minimum of essential parameters. The latter is achieved by requiring subsystems with the same entropy, regardless of whether the state of the entire system
Externí odkaz:
http://arxiv.org/abs/2407.18474
Publikováno v:
Sci Rep 14 (2024) 25684
We introduce a purely geometric formulation for two different measures addressed to quantify the entanglement between different parts of a tripartite qubit system. Our approach considers the entanglement-polytope defined by the smallest eigenvalues o
Externí odkaz:
http://arxiv.org/abs/2405.09466
Autor:
Lopez-Duran, Juan, Rosas-Ortiz, Oscar
Publikováno v:
Symmetry-Basel 14 (2022) 2272
The strongly transcendental equations of vector phase matching are transformed into a fourth order polynomial equation that admits analytical solution. The real roots of this equation provide the optical axis orientations that are useful for efficien
Externí odkaz:
http://arxiv.org/abs/2209.06145
Autor:
Rosas-Ortiz, Oscar, Zelaya, Kevin
Publikováno v:
Quantum Rep. 2021, 3, 500-516
Photon subtraction is useful to produce nonclassical states of light addressed to applications in photonic quantum technologies. After a very accelerated development, this technique makes possible obtaining either single photons or optical cats on de
Externí odkaz:
http://arxiv.org/abs/2108.12528
Publikováno v:
Symmetry 2021,13,1583
The construction of exactly solvable refractive indices allowing guided TE modes in optical waveguides is investigated within the formalism of Darboux-Crum transformations. We apply the finite-difference algorithm for higher-order supersymmetric quan
Externí odkaz:
http://arxiv.org/abs/2108.12523
Autor:
Zelaya, Kevin, Rosas-Ortiz, Oscar
Publikováno v:
Quantum Rep. 2021, 3, 458-472
We associate the stationary harmonic oscillator with time-dependent systems exhibiting non-Hermiticity by means of point transformations. The new systems are exactly solvable, with all-real spectrum, and transit to the Hermitian configuration for the
Externí odkaz:
http://arxiv.org/abs/2108.08958
Publikováno v:
Eur. Phys. J. Plus 136 (2021) 534
A new class of states of light is introduced that is complementary to the well-known squeezed states. The construction is based on the general solution of the three-term recurrence relation that arises from the saturation of the Schr\"odinger inequal
Externí odkaz:
http://arxiv.org/abs/2103.07082
Autor:
Rosas-Ortiz, Oscar
Publikováno v:
Geometric Methods in Physics XXXVIII. Trends in Mathematics. Birkh\"auser, Cham, 2020, pp 351-361
Extended abstract of "Algebraic approach to position-dependent mass systems in both classical and quantum pictures", a series of three lectures delivered by the author in the VIII School on Geometry and Physics, 24 June-8 June 2019, organized by the
Externí odkaz:
http://arxiv.org/abs/2002.02297
Publikováno v:
Geometric Methods in Physics XXXVIII. Trends in Mathematics. Birkh\"auser, Cham, 2020, pp 117-128
We report a new set of Laguerre-Gaussian wave-packets that propagate with periodical self-focusing and finite beam width in weakly guiding inhomogeneous media. These wave-packets are solutions to the paraxial form of the wave equation for a medium wi
Externí odkaz:
http://arxiv.org/abs/2001.03456
Publikováno v:
Geometric Methods in Physics XXXVIII. Trends in Mathematics. Birkh\"auser, Cham, 2020, pp 283-292
The energy spectra of two different quantum systems are paired through supersymmetric algorithms. One of the systems is Hermitian and the other is characterized by a complex-valued potential, both of them with only real eigenvalues in their spectrum.
Externí odkaz:
http://arxiv.org/abs/2001.02794