Work

Adiabatic critical quantum metrology cannot reach the Heisenberg limit even when shortcuts to adiabaticity are applied

Year: 2021

Type: article

Abstract: We show that the quantum Fisher information attained in an adiabatic approach to critical quantum metrology cannot lead to the Heisenberg limit of precision and therefore regular quantum metrology under optimal settings is always superior. Furthermore, we argue that even though shortcuts to adiabaticity can arbitrarily decrease the time of preparing critical ground states, they cannot be used to achieve or overcome the Heisenberg limit for quantum parameter estimation in adiabatic critical quantum metrology. As case studies, we explore the application of counter-diabatic driving to the Landau-Zener model and the quantum Rabi model.

Source: Quantum

DOI: 10.22331/q-2021-07-01-489

Authors: Karol Gietka, Friederike Metz, Tim Keller, Jing Li

Institution: Okinawa Institute of Science and Technology Graduate University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $215

Funders: Okinawa Institute of Science and Technology Graduate University, Japan Society for the Promotion of Science, Fogarty International Center