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




CNR Senior Reseacher



CNR PostDoc



Associate PostDoc



Associate PhD Student



CNR Researcher



CNR Technician




De Giorgi

CNR Technologist



Associate PhD Student



Associate PhD Student


  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)

Latest News

Technology Trasfer in Nanotechnology

Technology Transfer in Nanotechnology: Challenges and Opportunity

Lecce, 18/19 ottobre 2018

CNR NANOTEC c/o Campus Ecotekne

JRC in collaboration with the National Research Council (Cnr) is organising a workshop on Technology Transfer in Nanotechnology,

which will take place in CNR Nanotec (Lecce, Italy) on 18 and 19 October. This workshop is organised in the framework of the TTO-CIRCLE initiatives.   The aim of this event is to explore how technology transfer activities can be used as a mechanism to help EU industry, particularly Start-ups and SMEs, and Government in deploying and adopting Nano-technology. Practical examples will be presented to illustrate the potential of technology transfer in this area.   The workshop will gather technology providers, industry executives, technology transfer officers, policy makers and financial intermediaries to share experiences and lessons learned. One of the key objectives is to discuss policy implications at all levels that could help accelerating the adoption of Nanotechnology by the European manufacturing industry. More informations: https://ec.europa.eu/jrc/communities/community/european-tto-circle/event/technology-transfer-nanotechnology Download Locandina

Nanotechnology Transfer Day

26 Luglio 2018 - Lecce

CNR NANOTEC c/o Campus Ecotekne Siglato l’accordo lo scorso maggio tra CNR NANOTEC e Pairstech Capital Management, ha preso il via la collaborazione con PhD TT per la valutazione della ricerca

E’partita la collaborazione con PhD TT per la valorizzazione della ricerca sulla base dell’accordo siglato lo scorso Maggio tra CNR NANOTEC e Pairstech Capital Management, società di gestione patrimoniale che fornisce agli investitori istituzionali e privati un insieme di veicoli di investimento, al fine di valorizzare i risultati della ricerca svolta all'interno dell'Istituto.

Giovedì 19 Luglio dalle ore 11 alle ore 14 nella sede del CNR Nanotec di Lecce si è tenuto un incontro sul trasferimento tecnologico nel settore delle nanotecnologie applicate al settore biomedicale.

L’evento è stato organizzato dall’ufficio di Trasferimento Tecnologico del CNR Nanotec che ha inaugurato con questa giornata un ciclo di eventi mirato a presentare agli attori dell’ecosistema dell’innovazione nel settore delle nanotecnologie i vari modelli e alcune best practice di trasferimento tecnologico. In questa prima giornata il dott. Heber Verri e la dott.ssa Paola Urbani hanno presentato il nuovo modello di trasferimento tecnologico PhD TTãIndex Model.

PhD TT è una realtà italiana completamente indipendente specializzata in trasferimento tecnologico, è un acceleratore organizzato per il Go to Venture Practice, orientata al mondo delle Lifes Sciences.

PhD TT ha sviluppato un nuovo modello di trasferimento tecnologico: il PhD TT©INDEX MODEL dedicato alla generazione di valore dell'innovazione, focalizzato alla riduzione dei rischi delle opportunità di investimento a sostegno della ricerca.

I ricercatori intervengono attivamente nell'analisi iniziale di fattibilità e nella costituzione della futura società (start-up), con l'obiettivo di attrarre capitale di rischio utile a sostenere la fase del trasferimento tecnologico nella visione della "Research for go-to-market".

Il modello PhD TT nasce da un bisogno del mercato, quello di far dialogare due mondi estremamente diversi tra loro: il mondo della ricerca e il mondo degli investimenti.

PhD TT supporta tutte le attività in collaborazione con il TTO - CNR Nanotec con un team di lavoro esperto e grazie a un comitato scientifico-economico qualificato.

In occasione dell'evento del 19/7 u.s. al CNR Nanotec di Lecce, PHD TT ha presentato il proprio track record, dove si sono potuti valutare in dettaglio i casi di successo di intervento del PhD TT©INDEX MODEL.

  Comunicato Stampa Photo Gallery

Disordered serendipity: a glassy path to discovery

A workshop in honour of Giorgio Parisi’s 70th birthday

September 19-21, 2018 - Roma

Sapienza University

With the occasion of celebrating Giorgio Parisi 70th birthday, the conference "Disordered serendipity: a glassy path to discovery" brings to Rome many among the world-leading experts in the field of complex systems. In order to properly represent the many fields of research where Giorgio Parisi gave a relevant contribution in his studies of disordered systems, the conference covers a broad spectrum of topics: from  fundamental and rigorous analysis of the statistical mechanics of disorder systems to applications in biology and computer science. These subjects are deeply interconnected since they are characterized by the presence of glassy behavior.