48 citations · 48 across the 4 of their papers we have counts for
4 papers
On balanced homodyne measurement -- simple proof of wave function collapse
Erwin Brüning, Shigeaki Nagamachi
Using only elementary calculus we prove that the balanced homodyne detector measures the quadrature phase amplitude of a signal. More precisely, after the measurement of photon num…
Parametrizations of degenerate density matrices
Erwin Brüning, Shigeaki Nagamachi
It turns out that a parametrization of degenerate density matrices requires a parametrization of $\mathfrak{F}=U(n)/({U(k_1)\times U(k_2)\times \cdots \times U(k_m)})\quad n=k_1 +\…
Parametrizations of density matrices
E. Brüning, H. Mäkelä, A. Messina +1
This article gives a brief overview of some recent progress in the characterization and parametrization of density matrices of finite dimensional systems. We discuss in some detail…
Teleportation of Continuous Quantum Variables: A New Approach
S. Nagamachi, E. Brüning
Teleportation of optical field states (as continuous quantum variables) is usually described in terms of Wigner functions. This is in marked contrast to the theoretical treatment o…