dorsal/arxiv
View SchemaQuantum algorithm for measuring the energy of n qubits with unknown pair-interactions
| Authors | Dominik Janzing |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0108052 |
| URL | https://arxiv.org/abs/quant-ph/0108052 |
| Journal | Quant. Inf. & Comp. 2 (3):198-207, 2002 |
Abstract
The well-known algorithm for quantum phase estimation requires that the considered unitary is available as a conditional transformation depending on the quantum state of an ancilla register. We present an algorithm converting an unknown n-qubit pair-interaction Hamiltonian into a conditional one such that standard phase estimation can be applied to measure the energy. Our essential assumption is that the considered system can be brought into interaction with a quantum computer. For large n the algorithm could still be applicable for estimating the density of energy states and might therefore be useful for finding energy gaps in solid states.
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"abstract": "The well-known algorithm for quantum phase estimation requires that the\nconsidered unitary is available as a conditional transformation depending on\nthe quantum state of an ancilla register. We present an algorithm converting an\nunknown n-qubit pair-interaction Hamiltonian into a conditional one such that\nstandard phase estimation can be applied to measure the energy. Our essential\nassumption is that the considered system can be brought into interaction with a\nquantum computer. For large n the algorithm could still be applicable for\nestimating the density of energy states and might therefore be useful for\nfinding energy gaps in solid states.",
"arxiv_id": "quant-ph/0108052",
"authors": [
"Dominik Janzing"
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],
"journal_ref": "Quant. Inf. \u0026 Comp. 2 (3):198-207, 2002",
"title": "Quantum algorithm for measuring the energy of n qubits with unknown pair-interactions",
"url": "https://arxiv.org/abs/quant-ph/0108052"
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