Abstract

We prove the existence of a unitary transformation that enables two arbitrarily given Hamiltonians in the same Hilbert space to be transformed into one another. The result is straightforward yet, for example, it lays the foundation to implementing or mimicking dynamics with the most controllable Hamiltonian. As a promising application, this existence theorem allows for a rapidly evolving realization of adiabatic quantum computation by transforming a Hamiltonian where dynamics is in the adiabatic regime into a rapidly evolving one. We illustrate the theorem with examples.

Details

Title
Hamiltonian transformability, fast adiabatic dynamics and hidden adiabaticity
Author
Lian-Ao, Wu 1 ; Segal Dvira 2 

 The Basque Country University (EHU/UPV), Department of Theoretical Physics and History of Science, Bilbao, Spain (GRID:grid.11480.3c) (ISNI:0000000121671098); Ikerbasque, Basque Foundation for Science, Bilbao, Spain (GRID:grid.424810.b) (ISNI:0000 0004 0467 2314) 
 University of Toronto, Chemical Physics Theory Group, Department of Chemistry, and Centre for Quantum Information and Quantum Control, Toronto, Canada (GRID:grid.17063.33) (ISNI:0000 0001 2157 2938); University of Toronto, Department of Physics, Toronto, Canada (GRID:grid.17063.33) (ISNI:0000 0001 2157 2938) 
Publication year
2021
Publication date
2021
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2493254856
Copyright
© The Author(s) 2021. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.