dorsal/arxiv
View SchemaAdiabatic quantum computation and quantum phase transitions
| Authors | Jose Ignacio Latorre, Roman Orus |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0308042 |
| URL | https://arxiv.org/abs/quant-ph/0308042 |
| DOI | 10.1103/PhysRevA.69.062302 |
| Journal | Physical Review A 69, 062302 (2004) |
Abstract
We analyze the ground state entanglement in a quantum adiabatic evolution algorithm designed to solve the NP-complete Exact Cover problem. The entropy of entanglement seems to obey linear and universal scaling at the point where the mass gap becomes small, suggesting that the system passes near a quantum phase transition. Such a large scaling of entanglement suggests that the effective connectivity of the system diverges as the number of qubits goes to infinity and that this algorithm cannot be efficiently simulated by classical means. On the other hand, entanglement in Grover's algorithm is bounded by a constant.
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"abstract": "We analyze the ground state entanglement in a quantum adiabatic evolution\nalgorithm designed to solve the NP-complete Exact Cover problem. The entropy of\nentanglement seems to obey linear and universal scaling at the point where the\nmass gap becomes small, suggesting that the system passes near a quantum phase\ntransition. Such a large scaling of entanglement suggests that the effective\nconnectivity of the system diverges as the number of qubits goes to infinity\nand that this algorithm cannot be efficiently simulated by classical means. On\nthe other hand, entanglement in Grover\u0027s algorithm is bounded by a constant.",
"arxiv_id": "quant-ph/0308042",
"authors": [
"Jose Ignacio Latorre",
"Roman Orus"
],
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"quant-ph",
"cond-mat"
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"doi": "10.1103/PhysRevA.69.062302",
"journal_ref": "Physical Review A 69, 062302 (2004)",
"title": "Adiabatic quantum computation and quantum phase transitions",
"url": "https://arxiv.org/abs/quant-ph/0308042"
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