7 papers
Spatial mode storage in a gradient echo memory
Daniel B. Higginbottom, Ben M. Sparkes, Milos Rancic +4
Three-level atomic gradient echo memory (lambda-GEM) is a proposed candidate for efficient quantum storage and for linear optical quantum computation with time-bin multiplexing. In…
Precision spectral manipulation: a demonstration using a coherent optical memory
B. M. Sparkes, C. Cairns, M. Hosseini +4
The ability to coherently spectrally manipulate quantum information has the potential to improve qubit rates across quantum channels and find applications in optical quantum comput…
Time- and frequency-domain polariton interference
G. T. Campbell, M. Hosseini, B. M. Sparkes +2
We present experimental observations of interference between an atomic spin coherence and an optical field in a Λ-type gradient echo memory. The interference is mediated by a stron…
A Scalable, Self-Analyzing Digital Locking System for use on Quantum Optics Experiments
B. M. Sparkes, H. M. Chrzanowski, D. P. Parrain +3
Digital control of optics experiments has many advantages over analog control systems, specifically in terms of scalability, cost, flexibility, and the integration of system inform…
Photon number discrimination without a photon counter and its application to reconstructing non-Gaussian states
H. M. Chrzanowski, J. Bernu, B. M. Sparkes +5
The non-linearity of a conditional photon-counting measurement can be used to `de-Gaussify' a Gaussian state of light. Here we present and experimentally demonstrate a technique fo…
An AC Stark Gradient Echo Memory in Cold Atoms
B. M. Sparkes, M. Hosseini, G. Hétet +2
The burgeoning fields of quantum computing and quantum key distribution have created a demand for a quantum memory. The gradient echo memory scheme is a quantum memory candidate fo…