Tightening Quantum Speed Limits for Almost All States

Physical Review Letters
Francesco CampaioliKavan Modi

Abstract

Conventional quantum speed limits perform poorly for mixed quantum states: They are generally not tight and often significantly underestimate the fastest possible evolution speed. To remedy this, for unitary driving, we derive two quantum speed limits that outperform the traditional bounds for almost all quantum states. Moreover, our bounds are significantly simpler to compute as well as experimentally more accessible. Our bounds have a clear geometric interpretation; they arise from the evaluation of the angle between generalized Bloch vectors.

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Apr 30, 2017·Physical Review Letters·Francesco CampaioliKavan Modi

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Citations

Nov 26, 2019·Physical Review Letters·Shuning Sun, Yujun Zheng
Mar 29, 2020·Scientific Reports·Shao-Xiong Wu, Chang-Shui Yu
Apr 4, 2020·Physical Review Letters·Thomás FogartySteve Campbell
Apr 18, 2021·Physical Review. E·Diego Paiva PiresLucas Chibebe Céleri
May 22, 2021·Physical Review Letters·Adolfo Del Campo
Dec 23, 2021·Science Advances·Gal NessAndrea Alberti

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