1 citations · 1 across the 2 of their papers we have counts for
3 papers
quant-ph2007★ 1 cited
Quantum-noise-limited Angular Momentum Measurement for a Micron-sized Dielectric Object
Koji Usami
An approach is described for observing quantum features of micron-sized spinning objects. Specifically, we consider a birefringent (uniaxial positive) dielectric object in the shap…
quant-ph2004
Antinormally Ordered Photodetection of Continuous-mode Field
Koji Usami, Akihisa Tomita, Kazuo Nakamura
When the electromagnetic field is detected by stimulated emission, rather than by absorption, antinormally ordered photodetection can be realized. One of the distinct features of t…
quant-ph2001
Restoration of Entanglement by Spectral Filters
K. Usami, Y. Nambu, S. Ishizaka +4
We experimentally demonstrate that entanglement of bi-photon polarization state can be restored by spectral filters. This restoration procedure can be viewed as a new class of quan…