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18 papers · 2 filters
Photon-induced Self Trapping and Entanglement of a Bosonic Josephson Junction Inside an Optical Resonator
P. Rosson, G. Mazzarella, G. Szirmai +1
We study the influence of photons on the dynamics and the ground state of the atoms in a Bosonic Josephson junction inside an optical resonator. The system is engineered in such a…
Composite pulses for high-fidelity population inversion in optically dense, inhomogeneously broadened atomic ensembles
Gabor Demeter
We derive composite pulse sequences that achieve high-fidelity excitation of two-state systems in an optically dense, inhomogeneously broadened ensemble. The composite pulses are r…
Optimal witnessing of the quantum Fisher information with few measurements
Iagoba Apellaniz, Matthias Kleinmann, Otfried Gühne +1
We show how to verify the metrological usefulness of quantum states based on the expectation values of an arbitrarily chosen set of observables. In particular, we estimate the quan…
Structural Features of Sequential Weak Measurements
Lajo Diósi
We discuss the abstract structure of sequential weak measurement (WM) of general observables. In all orders, the sequential WM correlations without post-selection yield the corresp…
Sourcing semiclassical gravity from spontaneously localized quantum matter
Antoine Tilloy, Lajos Diósi
The possibility that a classical space-time and quantum matter cohabit at the deepest level, i.e. the possibility of having a fundamental and not phenomenological semiclassical gra…
Exponential Sensitivity and its Cost in Quantum Physics
András Gilyén, Tamás Kiss, Igor Jex
State selective protocols, like entanglement purification, lead to an essentially non-linear quantum evolution, unusual in naturally occurring quantum processes. Sensitivity to ini…