Read all about it here!
https://opg.optica.org/josab/fulltext.cfm?uri=josab-42-6-1227&id=570933
All posts by Maarten
Correlated photons paper published!
We have published a new paper on “Phase-shifted Bell states” in JOSA B. We found some interesting new photon states in parametric down conversion, where we phase-shift the generated photons with additional wave plates. Read all about it here:
https://opg.optica.org/josab/fulltext.cfm?uri=josab-42-6-1227&id=570933
Marsden grant!
Photons on demand: dial up your number
Our group has been awarded a Marsden grant starting in 2022, totalling $921k over three years. Summary:
Optical quantum technologies are poised to revolutionise communication, computing, and metrology. Access to light sources that deterministically provide a precisely known number of photons (light quanta), or more generally light of a prescribed, uniquely quantum mechanical nature, is key to unlocking the full potential of these technologies. We will build such a source that consists of a single atom trapped near the surface of a piece of optical fibre that has been tapered to a width of just a few hundred nanometres, less than one per cent of the thickness of a human hair. The source works by using the quantum mechanical properties of absorption and emission of light by an atom and utilises the nanometre-size fibre to efficiently capture the quantum light emitted by the atom and then guide this light into regular telecommunication fibre. This light source will be truly quantum in nature and will yield large benefits to the quantum technology industry.
Bose(-Einstein) Condensate paper published
Since the realisation by Bose and Einstein in 1924 that the quantum ground state of a system is special in many ways, researchers have worked towards creating a quantum system with many particles occupying that ground state, now called a Bose-Einstein Condensate (BEC), with the first successful demonstration in 1995.
Here, we argue that BECs can be formed in non-ground states as we recently demonstrated and that the laboratory ground state does not have zero kinetic energy, as asserted by Einstein in 1925. We show that some naïve transformations in the literature have mistakenly supported the zero-kinetic energy ground state argument.
With this paper, we clarify the necessary conditions for a Bose condensate and pave the way for future experiments with non-ground state condensates.
The paper can be found here:
“A Bose-Einstein condensate is a Bose condensate in the laboratory ground state” published online and to appear in the October print issue with Proceedings of the Royal Society A. 477, p.20210465 doi: 10.1098/rspa.2021.0465
Spin-Orbit coupling paper online!
After many months of data crunching, the paper on Thermalisation of a Spin-Orbit coupled Bose Gas is finally online, and submitted to PRL. Find the abstract here:
Helium review published!
A paper reviewing measurements of the size of the helium nucleus, which is also known as the article, was published today. The link is here: The size of the helium nucleus: then and now.
This is an easy-to-read review and should be accessible to most physicists. It was written for the Rutherford anniversary edition of the Journal of the Royal Society of New Zealand. Enjoy!
Localisation Landscape Theory paper published!
After many revisions and new insight into the physics, this paper is now published. Well done Sophie! You can find it here:
Computing the eigenstate localisation length at very low energies from Localisation Landscape Theory
Sophie S. Shamailov, Dylan J. Brown, Thomas A. Haase, Maarten D. Hoogerland
SciPost Phys. Core 4, 017 (2021).
is published here:
Anderson localisation paper published!
After many years of experiments and theoretical analysis our paper on Anderson localisation got published in Nature Communications! It can be accessed here:
Anderson localisation paper submitted!
The long awaited on Anderson localisation is now submitted. For all details, see the paper on http://arxiv.org/abs/1911.04858
Eric Cornell at ICOLS
At the ICOLS conference, 5-8 July 2019, we had the honour of having Nobel Prize winner Eric Cornell here in New Zealand. Hereby a link to an article in the Otago Daily Times.