Continuous measurement of a qudit using dispersively coupled radiation

نویسندگان

چکیده

We analyze the continuous monitoring of a qudit coupled to cavity using both phase-preserving and phase-sensitive amplification. The quantum trajectories system are described by stochastic master equation, for which we derive appropriate Lindblad operators. measurement back-action causes spiraling in state coordinates during collapse, increases as levels become less distinguishable. discuss two examples: two-level an $N$-dimensional meter with rotational symmetry quadrature space. also provide comparison effects detection on equation show that average behavior is same cases, but individual collapse at different rates depending axis plane.

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ژورنال

عنوان ژورنال: Physical review

سال: 2022

ISSN: ['0556-2813', '1538-4497', '1089-490X']

DOI: https://doi.org/10.1103/physreva.105.052229