Zobrazeno 1 - 10
of 3 082
pro vyhledávání: '"YAMAMOTO, KAZUHIRO"'
In this study, we investigate the decoherence of a spatially superposed electrically neutral spin-$\frac12$ particle in the presence of a relativistic quantum electromagnetic field in Minkowski spacetime. We demonstrate that decoherence due to the sp
Externí odkaz:
http://arxiv.org/abs/2407.14581
We report the feasibility of detecting the gravity-induced entanglement (GIE) with optomechanical systems, which is the first investigation that clarifies the feasible experimental parameters to achieve a signal-to-noise ratio of S/N=1. Our proposal
Externí odkaz:
http://arxiv.org/abs/2406.04361
Autor:
Honjo, Takashi, Ashida, Yosuke, Auersperg-Castell, Oderich F., Friend, Megan, Heitkamp, Ian, Ichikawa, Atsuko K., Ishitsuka, Masaki, Izumi, Nao, Kasama, Sohei, Kawamura, Yuma, Kikawa, Tatsuya, Kobata, Takuya, Matsubara, Tsunayuki, Nakamura, Kiseki D., Nakamura, Hina, Sato, Yukine, Sakashita, Ken, Seiya, Yoshihiro, Takifuji, Kouchi, Yamamoto, Tatsuya, Yamamoto, Kazuhiro, Yasutome, Kenji
Upgrade work towards increasing the beam intensity of the neutrino production beamline at J-PARC is underway. Tertiary muon beam monitoring is essential for stable operation of the beamline. Accordingly, we are planning to replace the present muon mo
Externí odkaz:
http://arxiv.org/abs/2405.05877
We investigate violations of Leggett-Garg inequalities (LGIs) for a harmonic oscillator and a (1+1)-dimensional chiral scalar field with coherent-state projectors, which is equivalent to a heterodyne-type measurement scheme. For the harmonic oscillat
Externí odkaz:
http://arxiv.org/abs/2401.10692
Understanding the phenomenon of quantum superposition of gravitational fields induced by massive quantum particles is an important starting point for quantum gravity. The purpose of this study is to deepen our understanding of the phenomenon of quant
Externí odkaz:
http://arxiv.org/abs/2401.03867
Autor:
Mori, Yukino, Nakayama, Yota, Yamamoto, Kazuhiro, Ushiba, Takafumi, Forest, Dani`ele, Michel, Christophe, Pinard, Laurent, Teillo, Julien, Cagnoli, Gianpietro
We measured the mechanical loss of a dielectric multilayer reflective coating (ion-beam-sputtered SiO2 and Ta2O5) with and without TiO2 on sapphire disks between 6 and 77 K. The measured loss angle exhibited a temperature dependence, and the local ma
Externí odkaz:
http://arxiv.org/abs/2312.11940
We evaluate the gravity-induced negativity volume of the generalized Wigner function in a hybrid system consisting of a particle in a two-localized superposition state and an oscillator. The generalized Wigner function can capture the nonclassicality
Externí odkaz:
http://arxiv.org/abs/2311.10980
We investigate the violation of the Leggett-Garg inequalities for a quantum field, focusing on the two-time quasi-probability distribution function of the dichotomic variable with a coarse-grained scalar field. The Leggett-Garg inequalities are viola
Externí odkaz:
http://arxiv.org/abs/2311.02867
We investigate the quantum signature of gravity in optomechanical systems under quantum control. We analyze the gravity-induced entanglement and squeezing in mechanical mirrors in a steady state. The behaviors and the conditions for generating the gr
Externí odkaz:
http://arxiv.org/abs/2311.00563
Autor:
Hatakeyama, Kosei, Miki, Daisuke, Tani, Masaki, Yamasaki, Yuuki, Iso, Satoshi, Adam, Apriadi Salim, Rohim, Ar, Yamamoto, Kazuhiro
We investigate the violation of the Leggett-Garg inequalities for a harmonic oscillator in various quantum states. We focus on the two-time quasi-probability distribution function with a dichotomic variable constructed with the position operator of a
Externí odkaz:
http://arxiv.org/abs/2310.16471