Abstract
We propose a multi-mode modulation scheme for Continuous Variable (CV) quantum communications, which we call quantum pattern encoding. In this setting, classical information can be encoded into multi-mode patterns of discretely-modulated coherent states, which form instances of a communicable image space. Communicators can devise arbitrarily complex encoding schemes which are degenerate and highly non-uniform, such that communication is likened to the task of pattern recognition. We explore initial communication schemes that exploit these techniques, and which lead to an increased encoding complexity. We discuss the impact that this has on the role of a near-term quantum eavesdropper; formulating new, realistic classes of attacks and secure communication rates.
Highlights
The rapid maturation of the field of quantum communications [1,2] promises to make it one of the first technologies to be featured in the upcoming quantum revolution
Inspired by the channelposition-finding (CPF) formalism developed for quantum channel discrimination [43], here we introduce the concept of k-target position finding (k-TPF)
We investigate a multimode modulation scheme for bosonic quantum communications
Summary
The rapid maturation of the field of quantum communications [1,2] promises to make it one of the first technologies to be featured in the upcoming quantum revolution. By exploiting quantum information-theoretic protocols [3,4,5], we can assure provably secure communication based on underlying physical principles. The study of discretely modulated CV systems is of significant interest, where finite-dimensional entities are embedded into infinite-dimensional Hilbert spaces [19,20,21,22,23,24]. Such discrete-modulation schemes present simplifications over Gaussian modulation with regard to state preparation and data processing
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