| Literature DB >> 18643409 |
S M Roy1, Samuel L Braunstein.
Abstract
We show that when a suitable entanglement-generating unitary operator depending on a parameter is applied on N qubits in parallel, a precision of the order of 2(-N) in estimating the parameter may be achieved. This exponentially improves the precision achievable in classical and in quantum nonentangling strategies.Year: 2008 PMID： 18643409 DOI： 10.1103/PhysRevLett.100.220501
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161