- Our group is attending the InterPol QuantERA meeting in Warsaw!
- Our article Directional Goldstone waves in polariton condensates in collaboration with the CNR Nanotec @ Lecce group has been accepted in Nature Communications. Here you can read a summary for nonexperts:
Out to sea, as the wind whips across the water it generates waves which, quite intuitively, move in the same direction as the air propelling them. By measuring the displacement of the water from above, it is possible to infer the wavelength and frequency of the waves, and from these the ocean depth. Surprisingly, it turns out we can recreate this phenomenon in entirely different circumstances: the bizarre world of quantum mechanics.In this case, instead of water, the ‘sea’ is made of light trapped between tiny semiconductor mirrors. Inside these, particles of light couple to electrons to form a fluid of composite particles known as polaritons. As light tends to leak out from the mirrors, a laser must be used to maintain the fluid. By setting this up with a peak in strength around a central spot, an outward flow of light blows over the polaritons like a breeze on the ocean, exciting waves in exclusively one direction.
This quantum wind shows how nature can exhibit similar behaviour on radically different scales. Just as in the oceanographic case, we can take images of the displacement of these polariton waves and use them to calculate their wavelength and frequency, from which we can then find the density of the polaritons and whether they possess attributes associated with the strange phenomenon of superfluidity. In the past, it has not been easy to measure these properties in polaritons. So, by learning from oceanography we have not only uncover the elegant effects of quantum wind, we have also deepened our understanding of these remarkable fluids of light.
- Our group attended the Windsor 2019 CCPQ workshop, Dynamics of Complex Quantum Systems, where Marzena gave an invited talk and the students presented posters.
- We visited our QuantEra InterPol collaborators at Lille to discuss progresses and future plans.
- Marzena was invited to give a talk at the Non-equilibrium Phenomena in Superfluid and Coherent Quantum Systems conference in Newcastle University.
- Marzena gave a talk at the Field theories of Active and Driven matter workshop in Edinburgh.
- Richard passed his PhD viva with minor corrections! Many congratulations to him.
- Marzena visited United States to attend the Universal Themes of Bose-Einstein Condensation meeting in Pittsburgh, as well as the KITP program Open Quantum Systems Dynamics: Quantum Simulators and Simulations Far From Equilbrium.
- Alex Ferrier spent two weeks working with Piotr Deuar and Michal Matuszweski at the Institute of Physics, Polish Academy of Sciencies in Warsaw.
- Marzena and Paul went to the APS march meeting in Boston. Marzena gave the talk Equilibrium and Superfluidity in Polariton Condensates. Paul present on Bistability and Critical Slowing Down in Superconducting Circuits.
- Conor attended the Entanglement in Strongly Correlated Systems meeting in Benasque, Spain.
- Our paper on the properties of the signal mode in the polariton optical parametric oscillator regime was published in PRB.
- Members of the group visited the group of Alberto Amo at the University of Lille in December and will attend the next meeting of the Quantera Interpol consortium in Paris in February.
- Our work on the question of superfluidity in polaritons was featured in New Scientist and is discussed in the video below.
- Our paper about the Question of Superfluidity in Polaritons done in collaboration with Jonathan Keeling from St. Andrews has been published in Nature Comms.
- Our group organized the CEPC2018 workshop in Milton Keynes, UK.
- Marzena went to Santa Barbara for the DYNQ18 program.
- Marzena visited the Aspen Centre for Physics.
- Conor and Cristóbal attended the QFLM2018 Les Houches summer school.
- The QuantERA InterPolconsortium had its first meeting in Milton Keynes, UK.
- Professor Babak Seradjeh visited our group. He gave a seminar titled “Universal fluctuations of Floquet topological invariants at low frequencies”.
- Marzena went to Bonn for the meeting Condensates of Light.
- Paul attended the QIP 2018 conference in Delft.
- Our results on topological order in polaritons with Daniele Sanvitto’s group in Lecce have been published in Nature Materials.
- Marzena was awarded a QuantERA grant to study polariton lattices in collaboration with research groups in France, Germany, Israel, and Poland.
- Cristóbal Lledó Veloso joined our group for a PhD project in open quantum systems.
- Conor Mc Keever completed an MRes project in our group on phase space methods for polariton lattices, and has begun a PhD with us.
- Marzena and Alejandro went to Mykonos for the HPM 2017 conference, and Alejandro won a poster prize.
- Galaa has been awarded a PhD! He is staying on in the group as a post-doctoral researcher.
- Our group attended the QFLM conference in Corsica, presenting four posters.
- Marzena gave the Gareth Roberts Memorial Lecture in Newcastle, UK.
- Alex Ferrier joined us for a PhD project in Truncated Wigner Methods.
- Paul Brookes joined us for a PhD project in Circuit Quantum Electrodynamics.
- Przemek Szafulski joined us for a summer project in Monte Carlo Simulations of Superconducting Circuits.
- Our group attended the ICSCE8 meeting in Edinburgh.
- Professor Guido Pupillo visited our group. He gave a seminar titled “Cluster liquids and frustrated quantum magnetism with Rydberg gases”.