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6 papers · 2 filters
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…
On energy-momentum spectrum of stationary states with nonvanishing current on 1-d lattice systems
Takayuki Miyadera
On one-dimensional two-way infinite quantum lattice system, a property of translationally invariant stationary states with nonvanishing current expectation is investigated. We cons…
Observation of an oscillatory correlation function of multimode two-photon pairs
Hayato Goto, Yasuo Yanagihara, Haibo Wang +2
An oscillatory correlation function has been observed by the coincidence counting of multimode two-photon pairs produced with a degenerate optical parametric oscillator far below t…
Two-photon interference of multimode two-photon pairs with an unbalanced interferometer
Hayato Goto, Haibo Wang, Tomoyuki Horikiri +2
Two-photon interference of multimode two-photon pairs produced by an optical parametric oscillator has been observed for the first time with an unbalanced interferometer. The time…
On Halting Process of Quantum Turing Machine
Takayuki Miyadera, Masanori Ohya
We prove that there is no algorithm to tell whether an arbitrarily constructed Quantum Turing Machine has same time steps for different branches of computation. We, hence, can not…
Additivity of Entanglement of Formation of Two Three-level-antisymmetric States
Toshiyuki Shimono
Quantum entanglement is the quantum information processing resource. Thus it is of importance to understand how much of entanglement particular quantum states have, and what kinds…