Work

Hamiltonian quantum gates-energetic advantage from entangleability

Year: 2025

Type: article

Abstract: Hamiltonian quantum gates controlled by classical electromagnetic fields form the basis of any realistic model of quantum computers. In this letter, we derive a lower bound on the field energy required to implement such gates and relate this energy to the expected gate error. We study the entangleability (ability to entangle qubits) of Hamiltonians and highlight how this feature of quantum gates can provide a means for more energetically efficient computation. Ultimately, we show that a universal quantum computer can be realized with vanishingly low energetic requirements but at the expense of arbitrarily large complexity.

Source: Quantum Science and Technology

DOI: 10.1088/2058-9565/ae0daf

Authors: Josey Stevens, Sebastian Deffner

Institutions: Johns Hopkins University Applied Physics Laboratory, University of Maryland, Baltimore County

Language: English

Topic: Quantum Computing Algorithms and Architecture

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,895

Funder: John Templeton Foundation