Intrinsic Quantum Computation

JP Crutchfield, K Wiesner

Research output: Contribution to journalArticle (Academic Journal)peer-review

9 Citations (Scopus)


We introduce ways to measure information storage in quantum systems, using a recently introduced computation-theoretic model that accounts for measurement effects. The first, the quantum excess entropy, quantifies the shared information between a quantum process's past and its future. The second, the quantum transient information, determines the difficulty with which an observer comes to know the internal state of a quantum process through measurements. We contrast these with von Neumann entropy and quantum entropy rate and provide a closed-form expression for the latter for the class of deterministic quantum processes.
Translated title of the contributionIntrinsic Quantum Computation
Original languageEnglish
Pages (from-to)375 - 380
Number of pages6
JournalPhysics Letters A
Volume372 (4)
Publication statusPublished - Jan 2007

Bibliographical note

Publisher: Elsevier

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