Argonne National Laboratory

Entanglement of Two, Three and Four Plasmonically Coupled Quantum Dots

TitleEntanglement of Two, Three and Four Plasmonically Coupled Quantum Dots
Publication TypeJournal Article
Year of Publication2015
AuthorsOtten, M, Shah, RA, Scherer, NF, Min, MS, Pelton, M, Gray, SK
JournalPhysical Review B
Volume92
Start Page125432
Issue12-15
Date Published09/2015
Other NumbersANL/MCS-P5323-0315
AbstractWe model the quantum dynamics of two, three, or four quantum dots in proximity to a plasmonic system such as a metal nanoparticle or an array of metal nanoparticles. For all systems, an initial state with only one quantum dot in its excited state evolves spontaneously into a state with entanglement between all pairs of QDs. The entanglement arises from the couplings of the QDs to the dissipiative, plasmonic environment. Moreover, we predict that similarly entangled states can be generated in systems with appropriate geometries, starting in their ground states, by exciting the entire system with a single, ultrafast laser pulse. By using a series of repeated pulses, the system can also be prepared in an entangled state at an arbitrary time.  
URLhttp://journals.aps.org/prb/abstract/10.1103/PhysRevB.92.125432
PDFhttp://www.mcs.anl.gov/papers/P5323-0315.pdf