Erlangen 2022 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 61: Quantum Optics (Miscellaneous)

Q 61.5: Poster

Thursday, March 17, 2022, 16:30–18:30, P

Generation of GHZ-states using Symmetric Bell Multiport Beam Splitters — •Daniel Bhatti and Stefanie Barz — Institute for Functional Matter and Quantum Technologies & IQST, University of Stuttgart, Germany

Symmetric Bell multiport beam splitters, with N input and output modes, have been found useful for investigating the indistinguishability of multiple photons [1,2] and also for generating post-selected, highly entangled multi-photon states [3]. Interestingly, when employing polarization encoding varying the indistinguishability of the N independent input photons leads to different classes of entangled states [4]. In the case of N=3 and N=4 the generation of polarization encoded W-states and GHZ-states has been analyzed theoretically and in the case of W-states it has even been generalized to arbitrary N [5]. Choosing a particular set of polarization states for the N independent partially distinguishable input photons we, here, present a generalization for the generation of polarization encoded GHZ-states. This leads to different results for even and odd numbers of photons.
[1] A. J. Menssen, et al., PRL 118, 153603 (2017).
[2] A. E. Jones, et al., PRL 125, 123603 (2020).
[3] S. Paesani, et al., PRL 126, 230504 (2021).
[4] Y. L. Lim and A. Beige, Phys. Rev. A 71, 062311 (2005).