Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Manmana S. R."'
Publikováno v:
Phys. Rev. A 98, 013616 (2018)
We investigate the time evolution of density, spin, and pairing correlation functions in one-dimensional $t$-$J$ models following a quantum quench using the time-dependent density matrix renormalization group (tDMRG). While density and spin correlati
Externí odkaz:
http://arxiv.org/abs/1804.04069
Publikováno v:
Phys. Rev. B 97, 035118 (2018)
Motivated by dimensional crossover in layered organic ${\kappa}$ salts, we determine the phase diagram of a system of four periodically coupled Hubbard chains with frustration at half filling as a function of the interchain hopping ${t_{\perp}/t}$ an
Externí odkaz:
http://arxiv.org/abs/1705.04450
Autor:
Klyushina, E. S., Tiegel, A. C., Fauseweh, B., Islam, A. T. M. N., Park, J. T., Klemke, B., Honecker, A., Uhrig, G. S., Manmana, S. R., Lake, B.
Publikováno v:
Phys. Rev. B 93, 241109 (2016)
Unlike most quantum systems which rapidly become incoherent as temperature is raised, strong correlations persist at elevated temperatures in $S=1/2$ dimer magnets, as revealed by the unusual asymmetric lineshape of their excitations at finite temper
Externí odkaz:
http://arxiv.org/abs/1602.06184
Publikováno v:
Physical Review B 90, 104404 (2014)
We find unconventional Mott insulators in a quasi-2D version of the Shastry-Sutherland model in a magnetic field. In our realization on a 4-leg tube geometry, these are stabilized by correlated hopping of localized magnetic excitations. Using perturb
Externí odkaz:
http://arxiv.org/abs/1405.3260
Publikováno v:
Phys. Rev. B 89, 165104 (2014)
We consider quantum quenches in an integrable quantum chain with tuneable-integrability-breaking interactions. In the case where these interactions are weak, we demonstrate that at intermediate times after the quench local observables relax to a pret
Externí odkaz:
http://arxiv.org/abs/1311.4557
Publikováno v:
Phys. Rev. Lett. 111, 260401 (2013)
We study the non-equilibrium dynamics of correlations in quantum lattice models in the presence of long-range interactions decaying asymptotically as a power law. For exponents larger than the lattice dimensionality, a Lieb-Robinson-type bound effect
Externí odkaz:
http://arxiv.org/abs/1309.2308
Autor:
Matsuda, Y. H., Abe, N., Takeyama, S., Kageyama, H., Corboz, P., Honecker, A., Manmana, S. R., Foltin, G. R., Schmidt, K. P., Mila, F.
Publikováno v:
Phys. Rev. Lett. 111, 137204 (2013)
The magnetization process of the orthogonal-dimer antiferromagnet SrCu2(BO3)2 is investigated in high magnetic fields of up to 118 T. A 1/2 plateau is clearly observed in the field range 84 to 108 T in addition to 1/8, 1/4 and 1/3 plateaux at lower f
Externí odkaz:
http://arxiv.org/abs/1308.4151
Autor:
Zvyagin, S. A., Čižmár, E., Ozerov, M., Wosnitza, J., Feyerherm, R., Manmana, S. R., Mila, F.
Publikováno v:
Phys. Rev. B 83, 060409(R), 2011
Magnetic excitations in copper pyrimidine dinitrate, a spin-1/2 antiferromagnetic chain with alternating $g$-tensor and Dzyaloshinskii-Moriya interactions that exhibits a field-induced spin gap, are probed by means of pulsed-field electron spin reson
Externí odkaz:
http://arxiv.org/abs/1010.6141
Publikováno v:
Phys. Rev. B 81, 014407 (2010)
We study the T = 0 magnetization of frustrated two-leg spin ladders with arbitrary value of the spin S. In the strong rung limit, we use degenerate perturbation theory to prove that frustration leads to magnetization plateaux at fractional values of
Externí odkaz:
http://arxiv.org/abs/0907.1461
Publikováno v:
Phys. Rev. A 80, 041603(R) (2009)
Correlations between particles can lead to subtle and sometimes counterintuitive phenomena. We analyze one such case, occurring during the sudden expansion of fermions in a lattice when the initial state has a strong admixture of double occupancies.
Externí odkaz:
http://arxiv.org/abs/0903.2017