PERSPECTIVES AND OPEN ISSUES

To establish a comprehensive quasiparticle framework, it is important to closely examine the relationships between phenomenological models [1], first-principles applications [2, 3], experimental measurements [4], and potential applications [5], which were explored in this book considering previous and future proposals [6]. Through analysis of consistent physical, chemical and material properties, both basic and applied science research can be conducted. This book successfully identified concise mechanisms associated with the orbital-and spin-dependent intrinsic interactions [7, 8] and the essential properties of many 3D, 2D and 1D emergent systems [9-11]. The dynamic excitation processes of modified quasiparticles were also evaluated, such as the transformation from electron-photon into orbital-photon couplings under electromagnetic-wave perturbation and the coexistence of stable and intermediate chemical bondings. Additionally, some experimental examinations cannot be accomplished with purely physical limits, such as the non-conserved perpendicular momentum transfer from angle-resolved photoemission spectroscopy (ARPES) observations on 3D lithium oxides with numerous valence energy subbands [12] and their van Hove singularities closely related to quantum tunneling currents [13]. The main focus of systematic investigations in near-future scientific pursuits will be on how to present theoretical and experimental progress simultaneously, which is clearly illustrated in the following sections.