Derived representation scheme is a (nonabelian) derived functor (or its geometric counterpart) of a functor which to an associative algebra assigns the affine scheme of -dimensional representations of .
There are several formalisms approaching such a derived functor.
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Yu. Berest, X. Chen, F. Eshmatov, A. Ramadoss, Noncommutative Poisson structures, derived representation schemes and Calabi-Yau algebras, Contemp. Math. 583 (2012) 219–246 arXiv:1202.2717