Quantum Information and Entanglement Theory


  • Efficient quantum state tomography, M. Cramer, M.B. Plenio, S.T. Flammia, R. Somma, D. Gross, S.D. Bartlett, O. Landon-Cardinal, D. Poulin, and Y.-K. Liu, Nat. Commun. 1, 149 (2010).

How efficiently can we manipulate quantum states under constrained sets of operations? Is there a quantitative theory of quantum correlations a.k.a. entanglement and how is it related for example to thermodynamics and statistical mechanics?

Can we infer properties of many-body quantum states (such as entanglement) without making unproven assumptions and taking into account that experimentally available measurements are often quite constrained by experimental requirements?

If we wish to determine the properties of quantum states then we need to use detectors and other quantum devices. In the quantum domain these devices are complex themselves and we need to find efficient methods to characterize them. And this task, quantum detector tomography, needs to be achieved with the least experimental effort.

Our group explores all of the above questions, and some more, within the framework of entanglement theory. This work provides the technical and conceptual underpinning for many research problems that we are pursuing in this group.

Most Recent Papers

Exciton transport enhancement across quantum Su-Schrieffer-Heeger lattices with quartic nonlinearity, Physical Review B, 100, 104307 (2019)

Hybrid spatiotemporal architectures for universal linear optics, Physical Review A, 99, 062301 (2019)

Quantum Kibble-Zurek physics in long-range transverse-field Ising models, Physical Review A, 100, 032115 (2019)


Ulm University
Institute of Theoretical Physics
Albert-Einstein-Allee 11
D - 89069 Ulm

Tel: ++49 / 731 / 50 - 22911
Fax: ++49 / 731 / 50 - 22924

Office: Building O25, room 410

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