7 papers
Understanding Color Confinement through Quantum Reference Frames and Relational Observables
Kei-Ichi Kondo
We present a formulation for understanding color confinement on the basis of quantum reference frames (QRFs) and relational observables. In the QRF approach to color confinement, c…
Impossibility via W states and feasibility via W-like states for perfect quantum teleportation
Sora Kobayashi, Kei-Ichi Kondo
We examine the two-party perfect quantum teleportation of an unknown 1-qubit state in the case of sharing various 3-qubit entangled states between a sender and a receiver: GHZ stat…
Quark confinement due to unified magnetic monopoles and vortices reduced from symmetric instantons with holography
Kei-Ichi Kondo
We develop a geometric framework to analyze quark confinement in four-dimensional Euclidean Yang--Mills theory in terms of finite-action topological defects. Starting from…
Residual gauge symmetry and color confinement in the Yang-Mills theory
Naoki Fukushima, Kei-Ichi Kondo
We examine the restoration of the residual gauge symmetry in the Yang-Mills theory to be regarded as a confinement criterion. For this purpose we restrict the four-dimensional $SU(…
Quark confinement consistent with holography due to hyperbolic magnetic monopoles and hyperbolic vortices unifiedly reduced from symmetric instantons
Kei-Ichi Kondo
We give a review on hyperbolic magnetic monopoles and hyperbolic vortices obtained in the unified way through the conformal equivalence by the dimensional reduction from the symmet…
Further numerical evidences for the gauge-independent separation between Confinement and Higgs phases in lattice SU(2) gauge theory with a scalar field in the fundamental representation
Akihiro Shibata, Kei-Ichi Kondo
In the lattice gauge-scalar model with a single scalar field in the fundamental representation of the gauge group SU(2), we have quite recently found that there exists a gauge-inde…