Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Stronger Quantum Speed Limit For Mixed Quantum States

Version 1 : Received: 22 May 2023 / Approved: 23 May 2023 / Online: 23 May 2023 (08:17:43 CEST)

A peer-reviewed article of this Preprint also exists.

Bagchi, S.; Thakuria, D.; Pati, A.K. Stronger Quantum Speed Limit for Mixed Quantum States. Entropy 2023, 25, 1046. Bagchi, S.; Thakuria, D.; Pati, A.K. Stronger Quantum Speed Limit for Mixed Quantum States. Entropy 2023, 25, 1046.

Abstract

We derive a quantum speed limit for unitary evolution for the case of mixed quantum states using the stronger uncertainty relation for mixed quantum states. This bound can be optimized over different choices of Hermitian operators for a better bound. We illustrate this with some examples and show its better performance with respect to three existing bounds for mixed quantum states.

Keywords

Quantum Speed Limit; Mixed Quantum States; Time-Energy Uncertainty Relation

Subject

Physical Sciences, Quantum Science and Technology

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