TY - JOUR
T1 - Indirect Hamiltonian identification through a small gateway
AU - Burgarth, Daniel
AU - Maruyama, Koji
PY - 2009
Y1 - 2009
N2 - Identifying the many-body Hamiltonian of a large quantum system is essential in understanding many physical phenomena, yet extremely difficult in general. We show that coupling strengths in networks of spin-1/2 particles can be estimated indirectly through a gateway, provided that the coupling topology is known. The criterion for the feasibility of identification is described only by a simple topological property concerning how the gateway is connected to the entire network. We also address the issues of process efficiency and how degeneracies of the system can be lifted.
AB - Identifying the many-body Hamiltonian of a large quantum system is essential in understanding many physical phenomena, yet extremely difficult in general. We show that coupling strengths in networks of spin-1/2 particles can be estimated indirectly through a gateway, provided that the coupling topology is known. The criterion for the feasibility of identification is described only by a simple topological property concerning how the gateway is connected to the entire network. We also address the issues of process efficiency and how degeneracies of the system can be lifted.
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000270821000002&KeyUID=WOS:000270821000002
U2 - 10.1088/1367-2630/11/10/103019
DO - 10.1088/1367-2630/11/10/103019
M3 - Article
SN - 1367-2630
VL - 11
SP - 1
EP - 9
JO - New Journal of Physics
JF - New Journal of Physics
IS - 10
M1 - 103019
ER -