Professor Ian Walmsley CBE FRS FCGI: Publications

Entang-bling: Observing quantum correlations in room-temperature solids

Journal of Physics: Conference Series 442:1 (2013)

Authors:

IA Walmsley, KC Lee, M Sprague, B Sussman, J Nunn, N Langford, XM Jin, T Champion, P Michelberger, K Reim, D England, D Jaksch

Abstract:

Quantum entanglement in the motion of macroscopic solid bodies has implications both for quantum technologies and foundational studies of the boundary between the quantum and classical worlds. Entanglement is usually fragile in room-temperature solids, owing to strong interactions both internally and with the noisy environment. We generated motional entanglement between vibrational states of two spatially separated, millimeter-sized diamonds at room temperature. By measuring strong nonclassical correlations between Raman-scattered photons, we showed that the quantum state of the diamonds has positive concurrence with 98% probability. Our results show that entanglement can persist in the classical context of moving macroscopic solids in ambient conditions. © Published under licence by IOP Publishing Ltd.

Efficient optical pumping and high optical depth in a hollow-core photonic-crystal fibre for a broadband quantum memory

NEW JOURNAL OF PHYSICS 15 (2013) ARTN 055013

Authors:

Michael R Sprague, Duncan G England, Amir Abdolvand, Joshua Nunn, Xian-Min Jin, W Steven Kolthammer, Marco Barbieri, Bruno Rigal, Patrick S Michelberger, Tessa FM Champion, Philip St J Russell, Ian A Walmsley

High quantum efficiency photon-number-resolving detector for photonic on-chip information processing

Optica Publishing Group (2013) qm4l.1

Authors:

Brice Calkins, Paolo L Mennea, Adriana E Lita, Benjamin J Metcalf, W Steven Kolthammer, Antia Lamas Linares, Justin B Spring, Peter C Humphreys, Richard P Mirin, James C Gates, Peter GR Smith, Ian A Walmsley, Thomas Gerrits, Sae Woo Nam

Surpassing the conventional Heisenberg limit using classical resources

Optica Publishing Group (2013) qf2b.2

Authors:

Xian-Min Jin, Martin Lebrat, Lijian Zhang, Kachung Lee, Tim Bartley, Marco Barbieri, Joshua Nunn, Animesh Datta, Ian A Walmsley

Generalized multishearing interferometry for the complete multidimensional characterization of optical beams and ultrashort pulses

2012 Conference on Lasers and Electro-Optics, CLEO 2012 (2012)

Authors:

AS Wyatt, J Biegert, IA Walmsley

Abstract:

We demonstrate increased accuracy and precision in the reconstruction of the multidimensional phase of electromagnetic fields based on multiple spectral shearing interferometry measurements made with shears of an arbitrary magnitude. © 2012 OSA.

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