Measurement of the entanglement of two superconducting qubits via state tomography.
Science
; 313(5792): 1423-5, 2006 Sep 08.
Article
in En
| MEDLINE
| ID: mdl-16960003
ABSTRACT
Demonstration of quantum entanglement, a key resource in quantum computation arising from a nonclassical correlation of states, requires complete measurement of all states in varying bases. By using simultaneous measurement and state tomography, we demonstrated entanglement between two solid-state qubits. Single qubit operations and capacitive coupling between two super-conducting phase qubits were used to generate a Bell-type state. Full two-qubit tomography yielded a density matrix showing an entangled state with fidelity up to 87%. Our results demonstrate a high degree of unitary control of the system, indicating that larger implementations are within reach.
Search on Google
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Science
Year:
2006
Document type:
Article
Affiliation country:
United States