Quantum control of field-free molecular orientation

Abstract

This perspective offers valuable insights into the methods and techniques utilized to accomplish field-free molecular orientation. It also highlights the recent advancements in the precise control of molecular orientation at ultracold temperatures.

Influence of molecular orientation on the photodissociation process of LiH molecules

“…In the dissociation process, the population in the initial state is excited to different states responding to different products. Molecular orientation is another important research subject in molecular reaction dynamics and has attracted the interests of many researchers [24–31]. In recent years, the orientation of symmetric‐ and asymmetric‐top molecules has been extensively studied, and the evolutional characteristic of orientation has been explored by experimental and theoretical schemes [32–34].…”

Optimal and robust control of population transfer in asymmetric quantum-dot molecules

“…By carefully designing these control fields, it becomes possible to efficiently control the dynamics of the quantum system, ultimately enabling the transfer of population between different states. [6][7][8][9][10][11][12] Several coherent quantum control techniques have been widely used to achieve population transfer, such as stimulated Raman adiabatic passage (STIRAP), [13,14] shortcuts to adiabaticity, [15][16][17] and composite pulses. [18,19] By formulating the population transfer problem within an optimal control framework, quantum optimal control theory offers a powerful tool for finding optimal control strategies that maximize transfer efficiency while including constraints on the control fields.…”

Manipulating Quantum Interference in Two-Color (ω+3ω) Strong Laser Field Photodissociation Dynamics of D2+

“…The temporal shape of the two-color field depends on the polarization, the relative phase, and the intensity between the fundamental and its n-harmonic fields. This makes the two-color field possess a significant amount of control parameters, which have been used to manipulate molecular photodissociation, 6 control molecular alignment, 7,8 enhance intense high-harmonic radiations, 9,10 and aid terahertz generation. 11 The strong coupling between molecules and the intense field is complex due to the significant modification of the molecular Hamiltonian associated with electronic, vibrational, and rotational energy levels, which may influence the inner nuclear motion during the reaction process.…”

“…The temporal shape of the two-color field depends on the polarization, the relative phase, and the intensity between the fundamental and its n-harmonic fields. This makes the two-color field possess a significant amount of control parameters, which have been used to manipulate molecular photodissociation, control molecular alignment, , enhance intense high-harmonic radiations, , and aid terahertz generation …”