Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Midya, Bikashkali"'
Autor:
Midya, Bikashkali
Publikováno v:
Physical Review A 109, L061502 (2024)
We investigate the exact solvability and point-gap topological phase transitions in non-Hermitian lattice models. These models incorporate site-dependent nonreciprocal hoppings $J e^{\pm g_n}$, facilitated by a spatially fluctuating imaginary gauge f
Externí odkaz:
http://arxiv.org/abs/2406.07009
Autor:
Midya, Bikashkali
Publikováno v:
Physical Review A 106, 053513 (2022)
A phenomenon of topological directed amplification of certain initial perturbations is revealed theoretically to emerge in a class of asymptotically stable skin-effect lattices described by nonnormal Toeplitz operators $H_g$ with positive ``numerical
Externí odkaz:
http://arxiv.org/abs/2206.11879
Autor:
Midya, Bikashkali
Publikováno v:
Annals of Physics 421, 168280 (2020)
Externally controllable band gap properties of a material is crucial in designing optoelectronic devices with desirable properties on-demand. Here, a possibility of single parameter tuning of trivial to non-trivial topological band gap by the introdu
Externí odkaz:
http://arxiv.org/abs/2007.11325
Publikováno v:
Optics Letters 44, 1626-1629 (2019)
Non-Hermitian systems at the exceptional point (EP) degeneracy are demonstrated to be highly sensitive to environmental perturbation. Here, we propose and theoretically investigate a novel multilayered heterostructure favoring double EPs for a unique
Externí odkaz:
http://arxiv.org/abs/1902.09479
Autor:
Midya, Bikashkali, Zhao, Han, Qiao, Xingdu, Miao, Pei, Walasik, Wiktor, Zhang, Zhifeng, Litchinitser, Natalia M., Feng, Liang
Publikováno v:
Photonics Research 7, 363-367 (2019)
Coherent combination of emission power from an array of coupled semiconductor lasers operating on the same chip is of fundamental and technological importance. In general, the nonlinear competition among the array supermodes can entail incoherence an
Externí odkaz:
http://arxiv.org/abs/1902.03224
We propose to use a continuous supersymmetric (SUSY) transformation of a dielectric permittivity profile in order to design a photonic mode sorter. The iso-spectrality of the SUSY transformation ensures that modes of the waveguide preserve their prop
Externí odkaz:
http://arxiv.org/abs/1901.08965
Autor:
Midya, Bikashkali, Feng, Liang
Publikováno v:
Phys. Rev. A 98, 043838 (2018)
A one-dimensional discrete lattice of dimers is known to possess topologically protected edge states when interdimer coupling is stronger than intradimer coupling. Here, we address richer topological properties of photonic superlattices having arbitr
Externí odkaz:
http://arxiv.org/abs/1809.08716
Publikováno v:
Optics Letters 43, 4927-4930 (2018)
We introduce the notion of a supercharge optical array synthesized according to supersymmetric charge operators. Starting from an arbitrary array, mathematical supersymmetry transformation can be used systematically to create a zero-energy physical s
Externí odkaz:
http://arxiv.org/abs/1809.05756
Autor:
Yakaboylu, Enderalp, Midya, Bikashkali, Deuchert, Andreas, Leopold, Nikolai, Lemeshko, Mikhail
Publikováno v:
Phys. Rev. B 98, 224506 (2018)
We study a quantum impurity possessing both translational and internal rotational degrees of freedom interacting with a bosonic bath. Such a system corresponds to a `rotating polaron', which can be used to model, e.g., a rotating molecule immersed in
Externí odkaz:
http://arxiv.org/abs/1809.01204
Publikováno v:
Optics Letters 43, 3758-3761 (2018)
Single-mode operation of coupled systems such as optical-fiber bundles, lattices of photonic waveguides, or laser arrays requires an efficient method to suppress unwanted super-modes. Here, we propose a systematic supersymmetry-based approach to sele
Externí odkaz:
http://arxiv.org/abs/1806.01882