Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Parameshwar R"'
We present a comprehensive analysis of boundary phenomena in a spin-$\frac{1}{2}$ anisotropic Heisenberg chain (XXZ-$\frac{1}{2}$) in the gapped antiferromagnetic phase, with a particular focus on the interplay between fractionalized spin-$\frac{1}{4
Externí odkaz:
http://arxiv.org/abs/2412.00194
Publikováno v:
Archives of Medicine and Health Sciences, Vol 9, Iss 1, Pp 145-150 (2021)
Artificial intelligence (AI) is being used in almost all aspects of life. The AI can assist medical consultants, primary health workers, and hospital administrators to understand analyze and interpret the medical data. The concepts such as data minin
Externí odkaz:
https://doaj.org/article/7eb092789783416296c5901c37c2d7dc
We construct an exactly solvable $\mathscr{PT}-$symmetric non-Hermitian model where a spin$-\frac{1}{2}$ isotropic quantum Heisenberg spin chain is coupled to two spin$-\frac{1}{2}$ Kondo impurities at its boundaries with coupling strengths that are
Externí odkaz:
http://arxiv.org/abs/2406.10334
Non-Hermitian Hamiltonians capture several aspects of open quantum systems, such as dissipation of energy and non-unitary evolution. An example is an optical lattice where the inelastic scattering between the two orbital mobile atoms in their ground
Externí odkaz:
http://arxiv.org/abs/2402.09510
Autor:
Rupesh S. Devan, Vishal P. Thakare, Vivek V. Antad, Parameshwar R. Chikate, Ruchita T. Khare, Mahendra A. More, Rajendra S. Dhayal, Shankar I. Patil, Yuan-Ron Ma, Lukas Schmidt-Mende
Publikováno v:
ACS Omega, Vol 2, Iss 6, Pp 2925-2934 (2017)
Externí odkaz:
https://doaj.org/article/7f51d9bae87f4b3a80e57fa4ba4c2340
Autor:
Pasnoori, Parameshwar R., Tang, Yicheng, Lee, Junhyun, Pixley, J. H., Andrei, Natan, Azaria, Patrick
In this work we argue that the antiferromagnetic spin $\frac{1}{2}$ XXZ chain in the gapped phase with boundary magnetic fields hosts fractional spin $\frac{1}{4}$ at its edges. Using a combination of Bethe ansatz and the density matrix renormalizati
Externí odkaz:
http://arxiv.org/abs/2312.05970
We investigate the boundary effects that arise when spin-$\frac{1}{2}$ impurities interact with the edges of the antiferromagnetic spin-$\frac{1}{2}$ Heisenberg chain through spin exchange interactions. We consider both cases when the couplings are f
Externí odkaz:
http://arxiv.org/abs/2311.10569
Publikováno v:
Physical Review Research, Vol 2, Iss 1, p 013006 (2020)
Quantum impurity models are prevalent throughout many body physics, providing some prime examples of strongly correlated systems. Aside from being of great interest in themselves, they can provide deep insight into the effects of strong correlations
Externí odkaz:
https://doaj.org/article/d0f3cf5fd3ba44e78b0bee91a7cf833a
Publikováno v:
J. Phys. A: Math. Theor. 56 325001 (2023)
We construct the exact solution of a non-Hermitian $\mathscr{PT}$-symmetric isotropic Heisenberg spin chain with integrable boundary fields. We find that the system exhibits two types of phases we refer to as $A$ and $B$ phases. In the $B$ type phase
Externí odkaz:
http://arxiv.org/abs/2301.06004
We consider the spin $\frac{1}{2}$ Heisenberg chain with boundary magnetic fields and analyze it using a combination of Bethe ansatz and density matrix renormalization group (DMRG) techniques. We show that the system exhibits several different ground
Externí odkaz:
http://arxiv.org/abs/2212.14832