Name
Abstract | ||
|---|---|---|
We investigate how equilibrium entanglement is manifested in the nonlinear response of an N-qubit system. We show that in the thermodynamic limit the irreducible part of the nth-order nonlinear susceptibility indicates that the eigenstates of the system contain entangled (n + 1)-qubit clusters. This opens the way to a directly observable multiqubit entanglement signature. We show that the irreducible part of the static cubic susceptibility of a system of four flux qubits, as a function of external parameters, behaves as a global 4-qubit entanglement measure introduced in Ref. (20). We discuss the possibility of extracting purely-entanglement-generated contribution from the general multipoint correlators in a multiqubit system. |
Year | DOI | Venue |
|---|---|---|
2007 | 10.1007/s11128-007-0065-2 | Quantum Information Processing |
Keywords | DocType | Volume |
multiqubit entanglement,nonlinear susceptibility,03.67.Mn,03.67.Lx,05.30-d | Journal | 6 |
Issue | ISSN | Citations |
5 | 1570-0755 | 0 |
PageRank | References | Authors |
0.34 | 1 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| A. M. Zagoskin | 1 | 2 | 1.44 |
| A. Yu. Smirnov | 2 | 2 | 1.10 |
| satyandra k gupta | 3 | 0 | 0.34 |
| I. S. Slobodov | 4 | 0 | 0.34 |