We focus on quantum entanglement as the main route to quantum communications that are able to exceed the powers of existing classical techniques. A major research interest is Quantum Key Distribution (QKD) which was developed in partnership with Nokia.
Precision measurements are critical to quantum research. We are interested in optical phase measurements, to measure distance, position, acceleration, and optical path length. This will help create new high-precision measurement applications.
E Engin, D Bonneau, CM Natarajan, AS Clark, MG Tanner, RH Hadfield, SN Dorenbos, V Zwiller, K Ohira, N Suzuki, H Yoshida, N Iizuka, M Ezaki, JL O’Brien, MG Thompson
A Quantum Delayed-Choice Experiment. / Peruzzo, A., Shadbolt, P., Brunner, N., Popescu, S.; O'Brien, J. L.
Experimental realization of Shor’s quantum factoring algorithm using qubit recycling. / Martin-Lopez, E.; Laing, A.; Lawson, T. M.; Alvarez, R.; Zhou, X-Q.; O'Brien, J. L.
Quantum walks of correlated photons. / Peruzzo, A.; Lobino, M.; Matthews, J. C. F.; Matsuda, N.; Politi, A.; Poulios, K.; Zhou, X-Q.; Ismail, N.; Worhoff, K.; Lahini, Y.; Bromberg, Y.; Silberberg, Y.; Thompson, M. G.; O'Brien, J. L.
Interfacing Spins in an InGaAs Quantum Dot to a Semiconductor Waveguide Circuit Using Emitted Photons. / J. Luxmoore, Isaac; A. Wasley, Nicholas; J. Ramsay, Andrew; C. T. Thijssen, Arthur; Oulton, Ruth; Hugues, Maxime; Kasture, Sachin; V. Gopal, Achanta; Mark Fox, A.; S. Skolnick, Maurice.
Multimode quantum interference of photons in multiport integrated devices. / Peruzzo, A.; Laing, A.; Politi, A.; Rudolph, T.; O'Brien, J. L.