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• W4380853863 abstract "In two recent works, we studied the symmetry resolved R'enyi entropies of quasi-particle excited states in quantum field theory. We found that the entropies display many model-independent features which we discussed and analytically characterised. In this paper we extend this line of investigation by providing analytical and numerical evidence that a similar universal behavior arises for the symmetry resolved negativity. In particular, we compute the ratio of charged moments of the partially transposed reduced density matrix as an expectation value of twist operators. These are ``fused versions of the more traditionally used branch point twist fields and were introduced in a previous work. The use of twist operators allows us to perform the computation in an arbitrary number of spacial dimensions. We show that, in the large-volume limit, only the commutation relations between the twist operators and local fields matter, and computations reduce to a purely combinatorial problem. We address some specific issues regarding fermionic excitations, whose treatment requires the notion of partial time-reversal transformation, and we discuss the differences and analogies with their bosonic counterpart. We find that although the operation of partial transposition requires a redefinition for fermionic theories, the ratio of the negativity moments between an excited state and the ground state is universal and identical for fermions and bosons as well as for a large variety of very different states, ranging from simple qubit states to the excited states of free quantum field theories. Our predictions are tested numerically on a 1D Fermi chain." @default.
• W4380853863 created "2023-06-16" @default.
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• W4380853863 date "2023-06-14" @default.
• W4380853863 modified "2023-10-01" @default.
• W4380853863 title "Symmetry resolved entanglement of excited states in quantum field theory. Part III. Bosonic and fermionic negativity" @default.
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• W4380853863 doi "https://doi.org/10.1007/jhep06(2023)074" @default.
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