Quantum optimal control of multiple weakly interacting molecular rotors in the time-dependent Hartree approximation
- Princeton Univ., NJ (United States)
In this work we perform quantum optimal control simulations, based on the Time-Dependent Hartree (TDH) approximation, for systems of three to five dipole-dipole coupled OCS rotors. A control electric field is used to steer all of the individual rotors, arranged in chains and regular polygons in a plane, toward either identical or unique objectives. The goal is to explore the utility of the TDH approximation to model the field-induced dynamics of multiple interacting rotors in the weak dipole-dipole coupling regime. A stochastic hill climbing approach is employed to seek an optimal control field that achieves the desired objectives at a specified target time. We first show that multiple rotors in chain and polygon geometries can be identically oriented in the same direction; these cases do not significantly depend on the presence of the dipole-dipole interaction. Additionally, in particular geometrical arrangements, we demonstrate that individual rotors can be uniquely manipulated toward different objectives with the same field. Specifically, it is shown that for a three rotor chain, the two end rotors can be identically oriented in a specific direction while keeping the middle rotor in its ground state, and for an equilateral triangle, two rotors can be identically oriented in a specific direction while the third rotor is oriented in the opposite direction. These multirotor unique objective cases exploit the shape of the field in coordination with dipole-dipole coupling between the rotors. Comparisons to numerically exact calculations, utilizing the TDH-determined fields, are given for all optimal control studies involving systems of three rotors.
- Research Organization:
- Princeton Univ., NJ (United States); Krell Institute, Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); US Army Research Office (ARO)
- Grant/Contract Number:
- FG02-02ER15344; FG02-97ER25308; ARO W911NF-16-1-0014
- OSTI ID:
- 1609378
- Alternate ID(s):
- OSTI ID: 1508434
- Journal Information:
- Journal of Chemical Physics, Vol. 150, Issue 16; ISSN 0021-9606
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Implementation of three-qubit quantum computation with pendular states of polar molecules by optimal control
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journal | January 2020 |
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