Birefringent spin-photon interface generates polarization entanglement
Abstract: A spin-photon interface based on the luminescence of a singly charged quantum dot in a micropillar cavity allows for the creation of photonic entangled states. Current devices suffer from cavity birefringence, which limits the generation of spin-photon entanglement. In this paper, we theoretically study the light absorption and emission by the interface with an anisotropic cavity and derive the maximal excitation and spin-photon entanglement conditions. We show that the concurrence of the spin-photon state equal to one and complete quantum dot population inversion can be reached for a micropillar cavity with any degree of birefringence by tuning the quantum dot resonance strictly between the cavity modes. This sweet spot is also valid for generating a multiphoton cluster state, as we demonstrate by calculating the three-tangle and fidelity with the maximally entangled state.
- M. I. Dyakonov, ed., Spin physics in semiconductors (Springer International Publishing AG, Berlin, 2017).
- S. Bar-Ad and I. Bar-Joseph, Absorption quantum beats of magnetoexcitons in GaAs heterostructures, Phys. Rev. Lett. 66, 2491 (1991).
- P. Senellart, G. Solomon, and A. White, High-performance semiconductor quantum-dot single-photon sources, Nat. Nanotech. 12, 1026 (2017).
- P. Lodahl, A. Ludwig, and R. J. Warburton, A deterministic source of single photons, Phys. Today 75, 44 (2022).
- Z. McIntyre and W. A. Coish, Non-Markovian transient spectroscopy in cavity QED, Phys. Rev. Res. 4, L042039 (2022).
- N. H. Lindner and T. Rudolph, Proposal for Pulsed On-Demand Sources of Photonic Cluster State Strings, Phys. Rev. Lett. 103, 113602 (2009).
- M. M. Glazov, Electron and Nuclear Spin Dynamics in Semiconductor Nanostructures (Oxford University Press, Oxford, 2018).
- N. V. Leppenen, L. Lanco, and D. S. Smirnov, Quantum Zeno effect and quantum nondemolition spin measurement in a quantum dot–micropillar cavity in the strong coupling regime, Phys. Rev. B 103, 045413 (2021).
- K. Mølmer, Y. Castin, and J. Dalibard, Monte Carlo wave-function method in quantum optics, JOSA B 10, 524 (1993).
- H. Carmichael, An open system approach to quantum optics (Springer, Berlin, 1993).
- J. R. Johansson, P. D. Nation, and F. Nori, QuTiP 2: A Python framework for the dynamics of open quantum systems, Comput. Phys. Commun. 184, 1234 (2013).
- V. Coffman, J. Kundu, and W. K. Wootters, Distributed entanglement, Phys. Rev. A 61, 052306 (2000).
- F. Verstraete, M. Popp, and J. I. Cirac, Entanglement versus Correlations in Spin Systems, Phys. Rev. Lett. 92, 027901 (2004).
- F. Verstraete and H. Verschelde, Fidelity of mixed states of two qubits, Phys. Rev. A 66, 022307 (2002).
- A. Miranowicz and A. Grudka, Ordering two-qubit states with concurrence and negativity, Phys. Rev. A 70, 032326 (2004).
- D. Walls and G. Milburn, Quantum Optics (Springer Berlin Heidelberg, 2008).
- N. V. Leppenen and D. S. Smirnov, Optical measurement of electron spins in quantum dots: quantum Zeno effects, Nanoscale 14, 13284 (2022).
- L. D. Landau and E. M. Lifshitz, The Classical Theory of Fields (Butterworth-Heinemann, Oxford, 1975).
Paper Prompts
Sign up for free to create and run prompts on this paper using GPT-5.
Top Community Prompts
Collections
Sign up for free to add this paper to one or more collections.
