Stronger Quantum Speed Limit for Mixed Quantum States

Shrobona Bagchi*, Dimpi Thakuria, Arun Kumar Pati

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In this paper, 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.

Original languageEnglish
Article number1046
Issue number7
StatePublished - Jul 2023
Externally publishedYes


  • mixed quantum states
  • quantum speed limit
  • time-energy uncertainty relation


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