Quantum Continuous Variables: A Primer of Theoretical Methods

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Quantum Fisher information matrix and multiparameter estimation (2019, methodology): “SLD operator for multimode Gaussian states The derivation in this appendix is majorly based on the calculation in [62, 67].”
Effective Theory for the Measurement-Induced Phase Transition of Dirac Fermions (2021, background): “Matrix Riccati equations [46, 49, 76] of this type have a unique and well defined steady state.”
Irreversible entropy production: From classical to quantum (2020, background): “They play a crucial role in quantum optics and quantum information processing as important resources for quantum communication protocols (Braunstein and van Loock, 2005; Cerf et al., 2007; Serafini, 2017) and representations for the ground or thermal equilibrium states of linear systems.”
Performance and structure of single-mode bosonic codes (2017, background): “Continuous-variable (CV) systems [1–4] continue to gain applications in quantum information processing and communication.”
Advances in quantum cryptography (2019, positive): “Ideal implementations of QKD protocols based on continuous-variable systems [7, 9] and Gaussian states [6] may approach this capacity [34], while those based on discrete variables falls below by additional factors.”