Quantum algorithm for measuring the energy of n qubits with unknown pair-interactions

Simple item page
dc.creatorJanzing, Dominik
dc.date2001-08-10
dc.date.accessioned2026-07-07T06:30:02Z
dc.date.available2026-07-07T06:30:02Z
dc.descriptionThe 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.
dc.description6 pages, revtex
dc.identifierhttps://arxiv.org/abs/quant-ph/0108052
dc.identifierhttp://arxiv.org/abs/quant-ph/0108052
dc.identifierQuant. Inf. & Comp. 2 (3):198-207, 2002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/98245
dc.subjectQuantum Physics
dc.titleQuantum algorithm for measuring the energy of n qubits with unknown pair-interactions
dc.typetext

Files

Collections

arXiv