Regular Article - Solid State and Materials
One- and two-particle problem with correlated disorder potential
Guangdong Provincial Key Laboratory of Quantum Metrology and Sensing, School of Physics and Astronomy, Sun Yat-Sen University (Zhuhai Campus), 519082, Zhuhai, China
Accepted: 1 December 2020
Published online: 11 January 2021
Motivated by the recent experimental and theoretical progresses in the exploration of the effect of disorder in interacting system, we examine the effect of two types of correlated disorder, the quasi-periodic potential and speckle disorder potential, on one- and two-particle problem with exact diagonalization (ED) method. We give the phase diagram for single particle in the presence of quasi-periodic potential and also analyse the effect of strong interaction on the phase diagram for ground state in two dimensions. For the speckle disorder potential case, we examine both the effect of correlation length and disorder strength on single particle ground state energy and two-particle binding energy. Comparison of certain results between these two correlated disorder is also discussed. The transport property for different interaction strength under speckle disorder potential is also calculated and discussed at last.
© EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021