RT Journal Article
T1 Sequential Implementation of Global Quantum Operations
A1 Lamata, L.
A1 León, J.
A1 Pérez García, David
A1 Salgado, D.
A1 Solano, E.
AB We study the possibility for a global unitary applied on an arbitrary number of qubits to be decomposed in a sequential unitary procedure, where an ancillary system is allowed to interact only once with each qubit. We prove that sequential unitary decompositions are in general impossible for genuine entangling operations, even with an infinite-dimensional ancilla, being the controlled-NOT gate a paradigmatic example. Nevertheless, we find particular nontrivial operations in quantum information that can be performed in a sequential unitary manner, as is the case of quantum error correction and quantum cloning.
PB American Physical Society
SN 0031-9007
YR 2008
FD 2008-10-31
LK https://hdl.handle.net/20.500.14352/50305
UL https://hdl.handle.net/20.500.14352/50305
LA eng
NO Humboldt Foundation
NO Spanish Ministry of Education
NO Ikerbasque Foundation
NO CSIC
DS Docta Complutense
RD 6 abr 2025