A fundamental lower bound of actuating energy for broadband photon switching

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We derive a universal lower bound of actuating energy Es for broadband photon switching by using an uncertainty relation between time and the negative energy density of quantum fields. We find that broadband photon switching between perfect reflection and perfect transmission over a time ts should satisfy Es ≥ frac(ℏ, 6 π ts).

Original languageEnglish
Pages (from-to)3752-3758
Number of pages7
JournalPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number21
Publication statusPublished - 2008 May 19

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