dorsal/arxiv
View SchemaEfficient quantum algorithms for simulating sparse Hamiltonians
| Authors | Dominic W. Berry, Graeme Ahokas, Richard Cleve, Barry C. Sanders |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0508139 |
| URL | https://arxiv.org/abs/quant-ph/0508139 |
| DOI | 10.1007/s00220-006-0150-x |
| Journal | Communications in Mathematical Physics 270, 359 (2007) |
Abstract
We present an efficient quantum algorithm for simulating the evolution of a sparse Hamiltonian H for a given time t in terms of a procedure for computing the matrix entries of H. In particular, when H acts on n qubits, has at most a constant number of nonzero entries in each row/column, and |H| is bounded by a constant, we may select any positive integer $k$ such that the simulation requires O((\log^*n)t^{1+1/2k}) accesses to matrix entries of H. We show that the temporal scaling cannot be significantly improved beyond this, because sublinear time scaling is not possible.
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"abstract": "We present an efficient quantum algorithm for simulating the evolution of a\nsparse Hamiltonian H for a given time t in terms of a procedure for computing\nthe matrix entries of H. In particular, when H acts on n qubits, has at most a\nconstant number of nonzero entries in each row/column, and |H| is bounded by a\nconstant, we may select any positive integer $k$ such that the simulation\nrequires O((\\log^*n)t^{1+1/2k}) accesses to matrix entries of H. We show that\nthe temporal scaling cannot be significantly improved beyond this, because\nsublinear time scaling is not possible.",
"arxiv_id": "quant-ph/0508139",
"authors": [
"Dominic W. Berry",
"Graeme Ahokas",
"Richard Cleve",
"Barry C. Sanders"
],
"categories": [
"quant-ph"
],
"doi": "10.1007/s00220-006-0150-x",
"journal_ref": "Communications in Mathematical Physics 270, 359 (2007)",
"title": "Efficient quantum algorithms for simulating sparse Hamiltonians",
"url": "https://arxiv.org/abs/quant-ph/0508139"
},
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