116 citations · 1.4k across the 130 of their papers we have counts for
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Geometric phases and hidden gauge symmetry
Kazuo Fujikawa
The second quantized approach to geometric phases is reviewed. The second quantization generally induces a hidden local (time-dependent) gauge symmetry. This gauge symmetry defines…
Separability criteria for continuous variable systems
Kazuo Fujikawa
A general separability condition on the second moment (covariance matrix) for continuous variable two-party systems is derived by an analysis analogous to the derivation of the Ken…
Quantum anomalies and some recent developments
Kazuo Fujikawa
Some of the developments related to quantum anomalies and path integrals during the past 10 years are briefly discussed. The covered subjects include the issues related to the loca…
Analytic solution of the separability criterion for continuous variable systems
Kazuo Fujikawa
By using the algebraic separability criterion of R. Simon, we present an explicit determination of squeezing parameters for which the P-representation condition saturates the $Sp(2…