Stability window of trapless polariton Bose-Einstein condensates

Autor(es)

Sabari, S. ; Kumar, R. Kishor ; Radha, R. ; Muruganandam, P.

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW B; v. 105, n. 22, p. 7-pg., 2022-06-27.

Resumo

We theoretically explore the possibility of stabilizing the trapless polariton Bose-Einstein condensates (pBECs). Exploiting the variational method, we solve the associated nonlinear, complex Gross-Pitaevskii equation and derive the equation of motion for the amplitude and width of the condensate. These variational results described by ordinary differential equations are rewritten to perform a linear stability analysis to generate a stability window in the repulsive domain. A set of coupled nonlinear ordinary differential equations obtained through the variational approach are then solved by numerical simulations through the fourth-order Runge-Kutta method, which are further supported by the split-step Crank-Nicholson method, thereby setting the platform for stable pBECs. In particular, we generate a window containing system parameters in the g(1) - gamma(eff) space within which the system can admit stable condensates. The highlight of the results is that one observes beating effects in the real time evolution of the condensates with attractive interactions much similar to multicomponent BECs, and their periodicity can be varied by manipulating linear and nonlinear loss/gain terms. For repulsive condensates, one notices the stretching of the density. (AU)

• Processo FAPESP: 17/05660-0 - Estudos teóricos da estrutura e reações de núcleos exóticos e sistemas de muitos corpos
• Beneficiário: Brett Vern Carlson
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 20/02185-1 - Dinâmica com momento angular de dois condensados bosônicos acoplados com interações de longo alcance
• Beneficiário: Sabari Subramaniyan
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