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24 papers · 2 filters
Spectrally stable defect qubits with no inversion symmetry for robust spin-to-photon interface
Péter Udvarhelyi, Roland Nagy, Florian Kaiser +3
Scalable spin-to-photon interfaces require quantum emitters with strong optical transition dipole moment and low coupling to phonons and stray electric fields. It is known that par…
High-fidelity spin and optical control of single silicon vacancy centres in silicon carbide
Roland Nagy, Matthias Niethammer, Matthias Widmann +14
Optically interfaced spins in the solid promise scalable quantum networks. Robust and reliable optical properties have so far been restricted to systems with inversion symmetry. He…
Finite-size scaling of the photon-blockade breakdown dissipative quantum phase transition
A. Vukics, A. Dombi, J. M. Fink +1
We prove that the observable telegraph signal accompanying the bistability in the photon-blockade-breakdown regime of the driven and lossy Jaynes--Cummings model is the finite-size…
Nonequilibrium polariton dynamics in a Bose-Einstein condensate coupled to an optical cavity
Gábor Kónya, Dávid Nagy, Gergely Szirmai +1
We study quasiparticle scattering effects on the dynamics of a homogeneous Bose-Einstein condensate of ultracold atoms coupled to a single mode of an optical cavity. The relevant e…
Photonic quantum walks with four-dimensional coins
Lennart Lorz, Evan Meyer-Scott, Thomas Nitsche +5
The dimensionality of the internal coin space of discrete-time quantum walks has a strong impact on the complexity and richness of the dynamics of quantum walkers. While two-dimens…
Phase Transition in Iterated Quantum Protocols for Noisy Inputs
Martin Malachov, Igor Jex, Orsolya Kálmán +1
Quantum information processing exploits all the features quantum mechanics offers. Among them there is the possibility to induce nonlinear maps on a quantum system by involving two…