Arturo Arvizu-Mondragón, Francisco J. Mendieta-Jiménez, César A. López-Mercado, Ramón Muraoka-Espíritu
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Photonic communications with quadrature-amplitude modulated quantum coherent states in alternated and dual polarizations
We present the analysis of the quantum detection of coherent states used in photonic communications systems that employ the dimensions of both a) the complex amplitude in the quadrature-amplitude modulation (QAM) of order M (M-ary QAM) format, and b) the state of polarization of the quantum state. At the transmitter, a constellation of quantum composite coherent states is prepared producing a four-dimensional (4D) M-ary QAM modulation on the photonic carrier, either in alternated or in dual polarizations; the receiver implements a quantum detection strategy on the composite states constellation, to determine as precisely as possible which quantum state was sent. We employ the square root method (SRM) for the detection of the received 4D quantum coherent states constellation both: (a) in alternate polarizations, and (b) in dual polarizations, for the assessment of the photonic communications system performance in mutual information and in error probability.
期刊介绍:
Quantum Information Processing is a high-impact, international journal publishing cutting-edge experimental and theoretical research in all areas of Quantum Information Science. Topics of interest include quantum cryptography and communications, entanglement and discord, quantum algorithms, quantum error correction and fault tolerance, quantum computer science, quantum imaging and sensing, and experimental platforms for quantum information. Quantum Information Processing supports and inspires research by providing a comprehensive peer review process, and broadcasting high quality results in a range of formats. These include original papers, letters, broadly focused perspectives, comprehensive review articles, book reviews, and special topical issues. The journal is particularly interested in papers detailing and demonstrating quantum information protocols for cryptography, communications, computation, and sensing.