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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/201815
Monte Carlo study of few-bosons in a one-dimensional trap
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We consider a one-dimensional system of few-bosons in a harmonic trap that interact via a contact potential. In addition, we explore a system of non-interacting bosons in the presence of an impurity. The Variational Monte Carlo method is utilised to calculate an upper bound of the ground state energy. Furthermore, we numerically obtain the one-body density matrix, which allows us to determine the occupation numbers and the impurity density profile. The occupation numbers reveal that, in the absence of any impurity, the condensation diminishes as the repulsive interaction strength among bosons increases. Finally, in the presence of an impurity, we show the existence of two distinct regimes: a miscible regime and a non-miscible one.
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Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2023, Tutors: Bruno Juliá-Díıaz, Grigori Astrakharchik
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SABATER GARCÍA, Francesc. Monte Carlo study of few-bosons in a one-dimensional trap. [consulted: 15 of August of 2026]. Available at: https://hdl.handle.net/2445/201815