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Quantum Information Processing

Quantum histories and correlations in quantum measurements

  • 01-10-2018
Published in:
Authors
Marcelo Losada
Roberto Laura
Published in
Quantum Information Processing | Issue 10/2018

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Abstract

In this paper, the measurement process is described as an interaction between two quantum systems: the system to be measured and the measuring instrument. The time evolution is determined only by the Schrödinger equation, i.e., there is no collapse postulate. The description of the measurement process is performed using the quantum histories approach, which allows to express the correlation between the properties of the measured system, before the measurement, and the properties of the pointer variable of the instrument, after the measurement. From the point of view of this approach, we explore the possibility of obtaining information of incompatible observables with the same instrument, using different families of histories.

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previous article Exploring uncertainty relation and its connection with coherence under the Heisenberg spin model with the Dzyaloshinskii–Moriya interaction
next article Lorentz-covariant, unitary evolution of a relativistic Majorana qubit
Title
Quantum histories and correlations in quantum measurements
Authors
Marcelo Losada
Roberto Laura
Publication date
01-10-2018
Publisher
Springer US
Published in
Quantum Information Processing / Issue 10/2018
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-018-2050-3
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Lorentz-covariant, unitary evolution of a relativistic Majorana qubit

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