APIE TFAISeminaro vadovas: prof. habil. dr. Bronislovas KAULAKYS
Tematika: fizikos krypties disertacijų svarstymas, teorinės fizikos aktualūs klausimai.
Pranešėjų ir klausytojų kontingentas: Lietuvos tizikai teoretikai, doktorantai bei užsienio svečiai.
Detalesnė informacija: tel. 2193254, el. paštas: bronislovas.kaulakys@tfai.vu.lt
Nathan Goldman (Universite ́ Libre de Bruxelles, Belgija) pranešimas
Trečiadienį, rugsėjo 26 dieną 11 val. 432 kamb. Nathan Goldman
(Universite ́ Libre de Bruxelles, Belgija) skaitys pranešimą "Extracting Topological Edge States from an Atomic Cloud".
Santrauka:
The recent experimental realization of synthetic magnetic fields and spin-orbit couplings for ultra-cold atoms [1–4] opens the attractive possibility to engineer a wide family of topological phases [5–9]. In such arrange ments, one indeed expects to reproduce the physics of the quantum Hall effects and topological insulators, in a highly controllable and clean environment. However, measuring unambiguous signatures of these fascinating quantum phases, such as non-trivial topological order or the presence of current-carrying edge states, remains a fundamental issue for the cold-atom community.
In this talk, I will give a brief introduction to the field of synthetic gauge potentials for optical lattices. I will show how these setups can lead to non-trivial topological phases and discuss the possibility to measure them through available observables. In particular, I will present a realistic and efficient method allowing the detection of topological edge states in a two-dimensional optical lattice [10, 11].
[1] J. Dalibard, F. Gerbier, G. Juzeliunas, P. Ohberg, Rev. Mod. Phys. 83, 15231543 (2011).
[2] Y.-J. Lin, R. L. Compton, K. J. Garcia, J. V. Porto, I. B. Spielman, Nature, 462 628 (2009).
[3] Y.-J. Lin, K. Jimenez-Garca, and I. B. Spielman, Nature 471, 83 (2011).
[4] M. Aidelsburger, M. Atala, S. Nascimbene, S. Trotzky, Y.-A. Chen, and I. Bloch, Phys. Rev. Lett. 107 255301 (2011).
[5] N. R. Cooper, Advances in Physics 57, 539 (2008).
[6] M. Hafezi, A. S. Sorensen, M. D. Lukin and E. Demler, Europhys. Lett. 81, 10005 (2008).
[7] T. D. Stanescu, V. Galitski and S. Das Sarma, Phys. Rev. A 82, 013608 (2010).
[8] N. Goldman, I. Satija, P. Nikolic, A. Bermudez, M. A. Martin-Delgado, M. Lewenstein and I. B. Spielman, Phys. Rev. Lett. 105, 255302 (2010).
[9] A. Bermudez, L. Mazza, M. Rizzi, N. Goldman, M. Lewenstein, and M. A. Martin-Delgado, Phys. Rev. Lett. 105, 190404 (2010).
[10] N. Goldman, J. Beugnon and F. Gerbier, Phys. Rev. Lett. 108, 255303 (2012)
[11] N. Goldman, J. Beugnon and F. Gerbier, Identifying Topological Edge States in 2D Optical Lattices Using Light Scattering, arXiv:1209.2051v1.
Santrauka:
The recent experimental realization of synthetic magnetic fields and spin-orbit couplings for ultra-cold atoms [1–4] opens the attractive possibility to engineer a wide family of topological phases [5–9]. In such arrange ments, one indeed expects to reproduce the physics of the quantum Hall effects and topological insulators, in a highly controllable and clean environment. However, measuring unambiguous signatures of these fascinating quantum phases, such as non-trivial topological order or the presence of current-carrying edge states, remains a fundamental issue for the cold-atom community.
In this talk, I will give a brief introduction to the field of synthetic gauge potentials for optical lattices. I will show how these setups can lead to non-trivial topological phases and discuss the possibility to measure them through available observables. In particular, I will present a realistic and efficient method allowing the detection of topological edge states in a two-dimensional optical lattice [10, 11].
[1] J. Dalibard, F. Gerbier, G. Juzeliunas, P. Ohberg, Rev. Mod. Phys. 83, 15231543 (2011).
[2] Y.-J. Lin, R. L. Compton, K. J. Garcia, J. V. Porto, I. B. Spielman, Nature, 462 628 (2009).
[3] Y.-J. Lin, K. Jimenez-Garca, and I. B. Spielman, Nature 471, 83 (2011).
[4] M. Aidelsburger, M. Atala, S. Nascimbene, S. Trotzky, Y.-A. Chen, and I. Bloch, Phys. Rev. Lett. 107 255301 (2011).
[5] N. R. Cooper, Advances in Physics 57, 539 (2008).
[6] M. Hafezi, A. S. Sorensen, M. D. Lukin and E. Demler, Europhys. Lett. 81, 10005 (2008).
[7] T. D. Stanescu, V. Galitski and S. Das Sarma, Phys. Rev. A 82, 013608 (2010).
[8] N. Goldman, I. Satija, P. Nikolic, A. Bermudez, M. A. Martin-Delgado, M. Lewenstein and I. B. Spielman, Phys. Rev. Lett. 105, 255302 (2010).
[9] A. Bermudez, L. Mazza, M. Rizzi, N. Goldman, M. Lewenstein, and M. A. Martin-Delgado, Phys. Rev. Lett. 105, 190404 (2010).
[10] N. Goldman, J. Beugnon and F. Gerbier, Phys. Rev. Lett. 108, 255303 (2012)
[11] N. Goldman, J. Beugnon and F. Gerbier, Identifying Topological Edge States in 2D Optical Lattices Using Light Scattering, arXiv:1209.2051v1.
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