dorsal/arxiv
View SchemaMutual information--based approach to adaptive homodyne detection of quantum optical states
| Authors | Igor Bargatin |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0505197 |
| URL | https://arxiv.org/abs/quant-ph/0505197 |
| DOI | 10.1103/PhysRevA.72.022316 |
| Journal | Physical Review A 72, 022316 (2005) |
Abstract
I propose an approach to adaptive homodyne detection of digitally modulated quantum optical pulses in which the phase of the local oscillator is chosen to maximize the average information gain, i.e., the mutual information, at each step of the measurement. I study the properties of this adaptive detection scheme by considering the problem of classical information content of ensembles of coherent states. Using simulations of quantum trajectories and visualizations of corresponding measurement operators, I show that the proposed measurement scheme adapts itself to the features of each ensemble. For all considered ensembles of coherent states, it consistently outperforms heterodyne detection and Wiseman's adaptive scheme for phase measurements [H.M. Wiseman, Phys. Rev. Lett. 75, 4587 (1995)].
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"abstract": "I propose an approach to adaptive homodyne detection of digitally modulated\nquantum optical pulses in which the phase of the local oscillator is chosen to\nmaximize the average information gain, i.e., the mutual information, at each\nstep of the measurement. I study the properties of this adaptive detection\nscheme by considering the problem of classical information content of ensembles\nof coherent states. Using simulations of quantum trajectories and\nvisualizations of corresponding measurement operators, I show that the proposed\nmeasurement scheme adapts itself to the features of each ensemble. For all\nconsidered ensembles of coherent states, it consistently outperforms heterodyne\ndetection and Wiseman\u0027s adaptive scheme for phase measurements [H.M. Wiseman,\nPhys. Rev. Lett. 75, 4587 (1995)].",
"arxiv_id": "quant-ph/0505197",
"authors": [
"Igor Bargatin"
],
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"doi": "10.1103/PhysRevA.72.022316",
"journal_ref": "Physical Review A 72, 022316 (2005)",
"title": "Mutual information--based approach to adaptive homodyne detection of quantum optical states",
"url": "https://arxiv.org/abs/quant-ph/0505197"
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