Quantum Fluid Dynamics

Polaritons are light-matter particles formed by a strong interaction between the electronic excited states in a semiconductor and the light field of a microcavity.
Recently, they have attracted particular attention for their capacity to undergo phase transition to a collective coherent state in a similar way to the standard Bose-Einstein condensation demonstrated in cold atoms.

In the past years we have observed an incredibly rich phenomenology of quantum effects in fluids of polariton condensates, spanning from superfluid flow and persistent currents to the observation of a complex and important dynamics of vortex formation, stability and movement. More recently, thanks to the easy way of controlling and manipulating polariton states, as well as their fast dynamics, we could also observe that polaritons can be used as the perfect test-bed for the study of quantum phenomena which are hard to observe in other systems.

The aim of this line is the control of the fluid dynamics of quantum gases of polaritons, which are solid state particle which flow in the plane of the device much like a classical fluid, but retaining exceptional  properties typical of the quantum realm. These include the control of the formation of vortices and their motion, fundamental understanding of the quantum turbulence and phase transitions, but also the possibility to implement such phenomena in future devices for all-optical logic. The optical setup to operate with quantum fluid of light is a laboratory in which the ultrafast spectroscopy is paired with techniques such as digital off-axis holography and second order correlations.


1. Our group observed for the first time the polariton backjet and its ultrafast dynamics, an unexpected penomenon consisting in the spectacular dynamical accumulation of the particles in a central spot quite denser and much times thinner than the originally created drop of polaritons, in  the time of few ps. Nature Communications (2015)


2. Our results on quantized vorticity include the achievement of the first direct excitation of an half-vortex state, consisting in the two spin components carrying a l=1 and l=0 vorticity, respectively,  and the observation of the 2D+t spiralling dynamics of the phase singularity in a weakly nonlinear regime.  Science Advances (2015)


3. We spatially resolved for the first time the sub-ps dynamics of directly excited Rabi oscillations, typical of such systems and consisting in the simultaneous excitation of the two polariton modes by the ultrafast laser pulse. This gives rise to a beating in the time domain, which is equivalent to an oscillating energy transfer between the photon and exciton field. Phys. Rev. Lett. 113, 226401 (2014)


4. Using a coherent control between two counter-polarized exciting pulses, it is possible to convert the intensity oscillations associated to the Rabi splitting into polarization oscillations.

In this way the emission from the sample results into a continuously changing polarization state, swirling between opposite polarizations in the time of approximately 1 ps (as the Rabi period), and slowly fading into a fixed state in a 10 ps (as the lower polaritons lifetime)  Light Sci. Appl. 4, e350 (2015) .


Facilities & Labs

Photonics Lab @Lecce




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De Giorgi

CNR Technologist



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  1. D. G. Suárez-Forero, G. Cipagauta, H. Vinck-Posada, K. M. Fonseca Romero, B. A. Rodríguez, D. Ballarini, Entanglement properties of quantum polaritons, Physical Review B, 93, 205302, (2016), ISSN: 1754-5692; doi: 10.1103/PhysRevB.93.205302
  2. L. Dominici, M. Petrov, M. Matuszewski, D. Ballarini, M. De Giorgi, D. Colas, E. Cancellieri, B. Silva Fernández, A. Bramati, G. Gigli, A. Kavokin, F. Laussy, D. Sanvitto, Real-space collapse of a polariton condensate, Nature Communications, 6, 8993, (2015), ISSN: 20411723; doi: 10.1038/ncomms9993
  3. L. Dominici, G. Dagvadorj, J. M. Fellows, S. Donati, D. Ballarini, M. De Giorgi, F. M. Marchetti, B. Piccirillo, L. Marrucci, A. Bramati, G. Gigli, M. H. Szymaska, D. Sanvitto, Vortex and half-vortex dynamics in a spinor quantum fluid of interacting polaritons, Science Advances, 1, e1500807, (2015), ISSN: 2375-2548; doi: 10.1126/sciadv.1500807
  4. L. Dominici, D. Colas, S. Donati, J.?P. Restrepo Cuartas, M. De Giorgi, D. Ballarini, G. Guirales, J.C. López Carreño, A. Bramati, G. Gigli, E. del Valle, F.P. Laussy, and D. Sanvitto, Ultrafast Control and Rabi Oscillations of Polaritons, Physical Review Letters, 113, 226401 (2014), ISSN: 0031-9007; doi: 0.1103/PhysRevLett.113.226401
  5. D. Colas, L. Dominici, S. Donati, A.A. Pervishko, T.C.H. Liew, I.A. Shelykh, D. Ballarini, M. de Giorgi, A. Bramati, G. Gigli, E. del Valle, F.P. Laussy, A.V. Kavokin, D. Sanvitto, Polarization shaping of Poincaré beams by polariton oscillations, Light Science & Applications, 4, e350 (2015), ISSN: 2047-7538; doi: 10.1038/lsa.2015.123
  6. H.S. Nguyen, D. Gerace, I. Carusotto, D. Sanvitto, E. Galopin, A. Lemaître, I. Sagnes, J. Bloch, and A. Amo, Acoustic Black Hole in a Stationary Hydrodynamic Flow of Microcavity Polaritons, Physical Review Letters, 114, 036402 (2015), ISSN: 0031-9007; doi: 10.1103/PhysRevLett.114.036402
  7. A. C. Berceanu, L. Dominici, I. Carusotto, D. Ballarini, E. Cancellieri, G. Gigli, M. H. Szymanska, D. Sanvitto, F. M. Marchetti, On multicomponent polariton superfluidity in the optical parametric oscillator regime, Physical Review B, 92, 035307 (2015), ISSN: 1098-0121; doi: 10.1103/PhysRevB.92.035307
  8. J.C. López Carreño, C. Sánchez Muñoz, D. Sanvitto, E. del Valle, F.P. Laussy, Exciting polaritons with quantum light, Physical Review Letters, 115, 196402 (2015), ISSN: 0031-9007; doi: 10.1103/PhysRevLett.115.196402
  9. E. Cancellieri, T. Boulier, R. Hivet, D. Ballarini, D. Sanvitto, M. H. Szymanska, C. Ciuti, E. Giacobino, A. Bramati, Merging of vortices and antivortices in polariton superfluids, Physical Review B, 90, 214518 (2014), ISSN: 1098-0121; doi: 10.1103/PhysRevB.90.214518

Other Selected Publications

  1. D. Sanvitto, S. Pigeon, A. Amo, D. Ballarini, M. De Giorgi, I. Carusotto, R. Hivet, F. Pisanello, V. G. Sala, P. S. S. Guimaraes, R. Houdré,E. Giacobino, C. Ciuti, A. Bramati, G. Gigli, All-optical control of the quantum flow of a polariton condensate, Nature Photonics, 5, 610 (2011) , ISSN: 1749-4885; doi: 10.1038/nphoton.2011.211
  2. A. Amo, S. Pigeon, D. Sanvitto, V. G. Sala, R. Hivet, I. Carusotto, F. Pisanello, G. Leménager, R. Houdré, E Giacobino, C. Ciuti, A. Bramati, Polariton Superfluids Reveal Quantum Hydrodynamic Solitons, Science, 332, 1167 (2011), ISSN: 1095-9203; doi: 10.1126/science.1202307


POLAFLOW: Polariton condensates: from fundamental physics to quantum based devicesStarting Grant ,FP7 – IDEAS – ERC-2012-StG, panel PE2 (2012-2017)

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ICONS - A Symposium on Colloidal Nanocrystals


October 10-11, 2019


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The symposium focuses on colloidal semiconductor nanocrystals (also known as quantum dots), which are a central topic in materials science and nanotechnology nowadays. The event will bring together renowned scientists in this research field discussing on fundamentals and future directions of this promising class of materials.  The program consists of two half-day sessions with four talks each covering synthesis, characterization, properties, and applications of colloidal semiconductor nanocrystals. The detailed program will be soon available.

The symposium is intended for anyone that is interested on this topic and will be free of charge. Attendees may present their own work in the dedicated poster session. Registration, with an eventual abstract submission for poster presentation, is required (please, send an e-mail to:   carlo.giansante@nanotec.cnr.it). The event is co-organized by Consiglio Nazionale delle Ricerche - Istituto di Nanotecnologia and Istituto Italiano di Tecnologia.

The final program is now available for download: ICoNS_Program[/vc_column_text][/vc_column][/vc_row]


 01 luglio 2019 - ore 14:15


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Realizzato nell'ambito delle attività del progetto "TecnoMed Puglia - Tecnopolo per la medicina di precisione", il meeting è dedicato allo studio delle malattie neurodegenerative: dai nuovi biomarcatori alle piu recenti modellizzazioni, per una migliore comprensione dei meccanismi di base e quindi per lo sviluppo di terapie sempre più ritagliate sul singolo paziente.

EIT RawMaterials Roadshow

21 giugno 2019 ore 09:00 – 15:00


Lecce, Aula Fermi Edificio Aldo Romano, Campus Ekotecne, Via Lecce-Monteroni


Farà tappa a Lecce il prossimo 21 giugno, presso l’Aula Fermi dell’edificio IBIL all’interno del Campus Ecotekne, l’EIT RawMaterials, la piattaforma per il sostegno all’innovazione finanziata dall’Istituto Europeo di Innovazione e Tecnologia (EIT).


L’EIT ha creato le cosiddette KIC – Knowledge Innovation Community, comunità che mirano alla promozione dell’innovazione e della formazione in Europa in settori cruciali, sostenendo l’imprenditorialità e favorendo il passaggio di nuove idee dalla fase di incubazione al mercato.


La EIT RawMaterials si impegna ad affrontare la sfida globale dell’approvvigionamento delle materie prime in Europa attraverso programmi e progetti che mirano allo sviluppo di tecnologia nell’intera catena di valore delle materie prime: dall’esplorazione delle risorse, all’industria mineraria, dai processi metallurgici alla sostituzione delle materie prime critiche o tossiche, dal riciclo dei materiali dei prodotti a fine vita sino alla progettazione di prodotti per l’economia circolare. Nell’ambito dei programmi di sviluppo a livello regionale, la EIT RawMaterials ha creato un Hub nella Regione Puglia coordinato da ENEA, al fine di incrementare il coinvolgimento degli ecosistemi locali nelle attività della KIC e del suo partenariato.


Il MedinHub avrà inoltre l’obiettivo di raggiungere nuove organizzazioni e promuovere la partecipazione delle industrie e delle PMI più innovative, nonché il coinvolgimento delle prestigiose università e centri di ricerca dell’area.


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