RT Journal Article
T1 Entanglement can Completely Defeat Quantum Noise
A1 Chen, Jianxin
A1 Cubitt, Toby S.
A1 Harrow, Aram W.
A1 Smith, Graeme
AB We describe two quantum channels that individually cannot send any classical information without some chance of decoding error. But together a single use of each channel can send quantum information perfectly reliably. This proves that the zero-error classical capacity exhibits superactivation, the extreme form of the superadditivity phenomenon in which entangled inputs allow communication over zerocapacity channels. But our result is stronger still, as it even allows zero-error quantum communication when the two channels are combined. Thus our result shows a new remarkable way in which entanglement across two systems can be used to resist noise, in this case perfectly. We also show a new form of superactivation by entanglement shared between sender and receiver.
PB American Physical Society
SN 0031-9007
YR 2011
FD 2011-12-15
LK https://hdl.handle.net/20.500.14352/44448
UL https://hdl.handle.net/20.500.14352/44448
LA eng
NO Comunidad de Madrid
NO Ministerio de Educación y Ciencia
NO Ministerio de Ciencia e Innovación (MICINN)
NO Unión Europea. FP7
NO Unión Europea
NO NSF
NO DARPA QuEST
DS Docta Complutense
RD 8 abr 2025