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8 papers · 2 filters
Smooth Metric Adjusted Skew Information Rates
Koji Yamaguchi, Hiroyasu Tajima
Metric adjusted skew information, induced from quantum Fisher information, is a well-known family of resource measures in the resource theory of asymmetry. However, its asymptotic…
Wigner-Araki-Yanase theorem for continuous and unbounded conserved observables
Yui Kuramochi, Hiroyasu Tajima
The Wigner-Araki-Yanase (WAY) theorem states that additive conservation laws imply the commutativity of exactly implementable projective measurements and the conserved observables…
Universal Sampling Lower Bounds for Quantum Error Mitigation
Ryuji Takagi, Hiroyasu Tajima, Mile Gu
Numerous quantum error-mitigation protocols have been proposed, motivated by the critical need to suppress noise effects on intermediate-scale quantum devices. Yet, their general p…
Effect of Wigner rotation on estimating unitary-shift parameter of relativistic spin-1/2 particle
Shin Funada, Jun Suzuki
We obtain the accuracy limit for estimating the expectation value of the position of a relativistic particle for an observer moving along one direction at a constant velocity. We u…
Fisher information matrix as a resource measure in resource theory of asymmetry with general connected Lie group symmetry
Daigo Kudo, Hiroyasu Tajima
In recent years, in quantum information theory, there has been a remarkable development in the general theoretical framework for studying symmetry in dynamics. This development, ca…
Integration of silicon-vacancy centers in nanodiamonds with an optical nanofiber
Ramachandrarao Yalla, Y. Kojima, Y. Fukumoto +5
We experimentally demonstrate the integration of silicon-vacancy centers in nanodiamonds (SiV-NDs) with an optical nanofiber (ONF). We grow SiV-NDs on seed NDs dispersed on a quart…