Joint qubit observables induced by indirect measurements in cavity QED
A fundamental feature of quantum mechanics is that there are observables which can be measured jointly only when some noise is added to them. Their sharp versions are said to be incompatible. In this work we investigate time-continuous joint qubit observables induced by a indirect time-continuous me...
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Main Authors | , |
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Format | Journal Article |
Language | English |
Published |
19.06.2024
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Subjects | |
Online Access | Get full text |
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Summary: | A fundamental feature of quantum mechanics is that there are observables
which can be measured jointly only when some noise is added to them. Their
sharp versions are said to be incompatible. In this work we investigate
time-continuous joint qubit observables induced by a indirect time-continuous
measurements. In particular we study a paradigmatic situation where a qubit is
interacting with a mode of light in a cavity and the light escaping the cavity
is continuously monitored. We find that the properties of the qubit observables
can be tuned by changing the type of the monitoring scheme or by tuning the
initial state of the cavity. We observe that homodyning two orthogonal
quadratures produces an optimal pair of biased jointly measurable qubit
observables. |
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DOI: | 10.48550/arxiv.2406.13403 |