We present a unified theory to treat conservation laws in light-matter interactions. It can be used to describe and engineer the transfer of any measurable property from the electromagnetic field to any object. The theory allows to explicitly characterize and separately compute the transfer due to asymmetry of the object and the transfer due to field absorption by the object. It also allows to compute the upper bound of the transfer rate of any given property to any given object, together with the corresponding most efficient illumination which achieves the bound. Due to its algebraic nature, the approach is inherently suited for computer implementation.

The unified theory allows for efficient engineering of light-matter interactions, enabling the transfer of any measurable property from the electromagnetic field to any object.

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Unified theory to describe and engineer conservation laws in light-matter interactions

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