1 citations · 1 across the 2 of their papers we have counts for
6 papers
Upper bound on the second derivative of the quenched pressure in spin-glass models: weak Griffiths second inequality
Manaka Okuyama, Masayuki Ohzeki
The Griffiths first and second inequalities have played an important role in the analysis of ferromagnetic models. In spin-glass models, although the counterpart of the Griffiths f…
Some inequalities for correlation functions of Ising models with quenched randomness
Manaka Okuyama, Masayuki Ohzeki
Correlation inequalities have played an essential role in the analysis of ferromagnetic models but have not been established in spin glass models. In this study, we obtain some cor…
Inequality for local energy of Ising models with quenched randomness and its application
Manaka Okuyama, Masayuki Ohzeki
In this study, we extend the lower bound on the average of the local energy of the Ising model with quenched randomness [J. Phys. Soc. Jpn. 76, 074711 (2007)] obtained for a symmet…
An exact solution of the partition function for mean-field quantum spin systems without the static approximation
Manaka Okuyama, Masayuki Ohzeki
Suzuki-Trotter decomposition is a well-known technique used to calculate the partition function of quantum spin systems, in which the imaginary-time dependence of the partition fun…
A useful fundamental speed limit for the imaginary-time Schrodinger equation
Manaka Okuyama, Masayuki Ohzeki
The quantum speed limit (QSL), or the energy-time uncertainty relation, gives a fundamental speed limit for quantum dynamics. Recently, Kieu [arXiv:1702.00603] derived a new class…
Comment on "Energy-time uncertainty relation for driven quantum systems" and "Quantum Speed Limit for Non-Markovian Dynamics"
Manaka Okuyama, Ryo Takahashi, Masayuki Ohzeki
Deffner and Lutz [J. Phys. A 46, 335302 (2013) and Phys. Rev. Lett. 111, 010402 (2013).] extended the Mandelstam-Tamm bound and the Margolus-Levitin bound to time-dependent and non…