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6 papers · 2 filters
Optimal multi-photon phase sensing with a single interference fringe
G. Y. Xiang, H. F. Hofmann, G. J. Pryde
Quantum entanglement can help to increase the precision of optical phase measurements beyond the shot noise limit (SNL) to the ultimate Heisenberg limit. However, the N-photon pari…
Derivation of quantum mechanics from a single fundamental modification of the relations between physical properties
Holger F. Hofmann
Recent results obtained in quantum measurements indicate that the fundamental relations between three physical properties of a system can be represented by complex conditional prob…
Quantum effects in the interaction of off-resonant coherent light with a single atom
Akihiro Yamaguchi, Holger F. Hofmann
Well controlled nonlinear interactions between light field pulses and single atoms could be used to implement optical quantum information technologies based on qubits encoded in su…
An investigation of the transfer dynamics of quantum teleportation by weak measurement statistics
Masanori Hiroishi, Holger F. Hofmann
We explore the mechanism of quantum teleportation by analyzing the weak measurement statistics post-selected by the result of the Bell measurement for the joint system composed of…
What the complex joint probabilities observed in weak measurements can tell us about quantum physics
Holger F. Hofmann
Quantum mechanics does not permit joint measurements of non-commuting observables. However, it is possible to measure the weak value of a projection operator, followed by the preci…
Unconditional quantum-noise suppression via measurement-based quantum feedback
Ryotaro Inoue, Shin-Ichi-Ro Tanaka, Ryo Namiki +2
We demonstrate unconditional quantum-noise suppression in a collective spin system via feedback control based on quantum non-demolition measurement (QNDM). We perform shot-noise li…