232 citations · 1.3k across the 64 of their papers we have counts for
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Anomalous quantum states in finite macroscopic systems
Akira Shimizu, Takayuki Miyadera, Akihisa Ukena
We consider finite macroscopic systems, i.e., systems of large but finite degrees of freedom, which we believe are poorly understood as compared with small systems and infinite sys…
Correlations of observables in chaotic states of macroscopic quantum systems
Ayumu Sugita, Akira Shimizu
We study correlations of observables in energy eigenstates of chaotic systems of a large size . We show that the bipartite entanglement of two subsystems is quite strong, wherea…
Appearance and Stability of Anomalously Fluctuating States in Shor's Factoring Algorithm
Akihisa Ukena, Akira Shimizu
We analyze quantum computers which perform Shor's factoring algorithm, paying attention to asymptotic properties as the number L of qubits is increased. Using numerical simulations…
Quantum Zeno Effect for Exponentially Decaying Systems
Kazuki Koshino, Akira Shimizu
The quantum Zeno effect -- suppression of decay by frequent measurements -- was believed to occur only when the response of the detector is so quick that the initial tiny deviation…