Solution to time-energy costs of quantum channels

Chi Hang Fred Fung, H. F. Chau, Chi Kwong Li, Nung Sing Sze

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


� Rinton Press. We derive a formula for the time-energy costs of general quantum channels proposed in [Phys. Rev. A 88, 012307 (2013)]. This formula allows us to numerically find the time-energy cost of any quantum channel using positive semidefinite programming. We also derive a lower bound to the time-energy cost for any channels and the exact the time-energy cost for a class of channels which includes the qudit depolarizing channels and projector channels as special cases.
Original languageEnglish
Pages (from-to)685-693
Number of pages9
JournalQuantum Information and Computation
Issue number7-8
Publication statusPublished - 1 Jan 2015


  • Fidelity
  • Quantum channel
  • Time-energy cost

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Statistical and Nonlinear Physics
  • Nuclear and High Energy Physics
  • Mathematical Physics
  • Physics and Astronomy(all)
  • Computational Theory and Mathematics


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