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- W4303648985 abstract "Perturbative gadgets are a tool to encode part of a Hamiltonian, usually the low-energy subspace, into a different Hamiltonian with favorable properties, for instance, reduced locality. Many constructions of perturbative gadgets have been proposed over the years. Still, all of them are restricted in some ways: Either they apply to some specific classes of Hamiltonians, they involve recursion to reduce locality, or they are limited to studying time evolution under the gadget Hamiltonian, e.g., in the context of adiabatic quantum computing, and thus involve subspace restrictions. In this work, we fill the gap by introducing a versatile universal, non-recursive, non-adiabatic perturbative gadget construction, without subspace restrictions, that encodes an arbitrary many-body Hamiltonian into the low-energy subspace of a three-body Hamiltonian. Our construction requires $rk$ additional qubits for a $k$-body Hamiltonian comprising $r$ terms. Besides a specific gadget construction, we also provide a recipe for constructing similar gadgets, which can be tailored to different properties, which we discuss." @default.
- W4303648985 created "2022-10-08" @default.
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- W4303648985 date "2022-10-06" @default.
- W4303648985 modified "2023-09-27" @default.
- W4303648985 title "Non-recursive perturbative gadgets without subspace restrictions and applications to variational quantum algorithms" @default.
- W4303648985 doi "https://doi.org/10.48550/arxiv.2210.03099" @default.
- W4303648985 hasPublicationYear "2022" @default.
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