Universal perspective on nonadiabatic quantum control

Abstract

A stable and fast path linking two arbitrary states of a quantum system is generally required for state-engineering protocols, such as stimulated Raman adiabatic passage, shortcuts to adiabaticity, and holonomic transformation. Such a path is also fundamental to the exact solution of the time-dependent Schrödinger equation. We construct a universal control framework using an ancillary picture, in which the time-dependent Hamiltonian can be diagonalized. Multiple desired paths can be derived by the von Neumann equation for parametric ancillary projection operators. No transition exists among the ancillary basis states during the time evolution. Under various conditions, our control framework reduces to the nonadiabatic holonomic transformation, the Lewis-Riesenfeld theory for invariants, and counterdiabatic driving methods. In addition, it is applicable to the cyclic transfer of system populations that could be a hard problem for existing methods. Our work can provide a full-rank time-evolution operator for a time-dependent quantum system with a finite number of dimensions.

arXiv comment12 pages, 9 figures

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• Entangling distant systems via universal nonadiabatic passage
• Preparing Greenberger-Horne-Zeilinger state on ground levels of neutral atoms
• Universal quantum control with dynamical correction
• Universal quantum control over bosonic network
• Universal quantum control over Majorana zero modes
• Universal quantum control over non-Hermitian continuous-variable systems
• Optimal control of population transfer in multi-level systems by dynamical quantum geometric tensor