Class of highly entangled many-body states that can be efficiently simulated
We describe a quantum circuit that produces a highly entangled state of N qubits from which one can efficiently compute expectation values of local observables. This construction yields a variational ansatz for quantum many-body states that can be regarded as a generalization of the multiscale entan...
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| Published in | Physical review letters Vol. 112; no. 24; p. 240502 |
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| Main Authors | , |
| Format | Journal Article |
| Language | English |
| Published |
United States
20.06.2014
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| Online Access | Get more information |
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| Summary: | We describe a quantum circuit that produces a highly entangled state of N qubits from which one can efficiently compute expectation values of local observables. This construction yields a variational ansatz for quantum many-body states that can be regarded as a generalization of the multiscale entanglement renormalization ansatz (MERA), which we refer to as the branching MERA. In a lattice system in D dimensions, the scaling of entanglement of a region of size L(D) in the branching MERA is not subject to restrictions such as a boundary law L(D-1), but can be proportional to the size of the region, as we demonstrate numerically. |
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| ISSN: | 1079-7114 |
| DOI: | 10.1103/PhysRevLett.112.240502 |