DOAJ Open Access 2021

Conditional Action and Imperfect Erasure of Qubits

Heinz-Jürgen Schmidt

Abstrak

We consider state changes in quantum theory due to “conditional action” and relate these to the discussion of entropy decrease due to interventions of “intelligent beings” and the principles of Szilard and Landauer/Bennett. The mathematical theory of conditional actions is a special case of the theory of “instruments”, which describes changes of state due to general measurements and will therefore be briefly outlined in the present paper. As a detailed example, we consider the imperfect erasure of a qubit that can also be viewed as a conditional action and will be realized by the coupling of a spin to another small spin system in its ground state.

Topik & Kata Kunci

Science Astrophysics Physics

Penulis (1)

Heinz-Jürgen Schmidt

Format Sitasi

APA MLA BibTeX

Schmidt, H. (2021). Conditional Action and Imperfect Erasure of Qubits. https://doi.org/10.3390/e23030289

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Informasi Jurnal

Tahun Terbit: 2021
Sumber Database: DOAJ
DOI: 10.3390/e23030289
Akses: Open Access ✓