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Department of Physics/

AG Eisert

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  • Quantum information theory, quantum many-body theory, and quantum optics
  • Research
  • Optical systems

Optical systems


Optical systems are the most suitable physical systems for transmitting quantum information over large distance. What is more, recent years have seen a remarkable progress in the understanding of performing precise quantum state manipulation of optical systems, both in the discrete variable setting involving polarization or time-bin encoding as well as so-called continuous variables. We are concerned with understanding what quantum state manipulation is possible after all, often in close collaboration with leading experimentalists.

Selected group publications

  • Reliable quantum certification for photonic quantum technologies
    Nature Communications 6, 8498 (2015)

  • Experimental implementation of the optimal linear-optical controlled phase gate
    Physical Review Letters 106, 013602 (2011)

  • Directly estimating non-classicality
    Physical Review Letters 106, 010403 (2011)

  • Photonic polarization gears for ultra-sensitive angular measurements
    Nature Communications 4, 2432 (2013)

  • Optical generation of matter qubit graph states
    New Journal of Physics 7, 194 (2005) 

  • Optimizing linear optics quantum gates
    Physical Review Letters 95, 040502 (2005) 

  • Measuring measurement
    Nature Physics 5, 27 (2009)

  • Distillation of continuous-variable entanglement with optical means
    Annals of Physics (NY) 311, 431 (2004) 

  • Driving non-Gaussian to Gaussian states with linear optics
    Physical Review A 67, 062320 (2003)

  • The entangling power of passive optical elements
    Physical Review Letters 90, 047904 (2003) 

  • Gaussification and entanglement distillation of continuous variable systems: a unifying picture
    Physical Review Letters 108, 020501 (2012)

  • Preparing the bound instance of quantum entanglement
    Physical Review Letters 107, 240503 (2011)

Group reviews

  • Advances in quantum teleportation
    Nature Photonics 9, 641 (2015)
  • Introduction to the basics of entanglement theory in continuous-variable systems
    International Journal of Quantum Information 1, 479 (2003) 
  • Gaussian quantum channels
    In: Continuous-variable quantum information science, Eds. E. Polzik, N. Cerf, G. Leuchs, (Imperial College Press, 2007)

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