6 citations · 11 across the 4 of their papers we have counts for
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Antinormally Ordered Photodetection of Continuous-mode Field
Koji Usami, Akihisa Tomita, Kazuo Nakamura
When the electromagnetic field is detected by stimulated emission, rather than by absorption, antinormally ordered photodetection can be realized. One of the distinct features of t…
Measured Quantum Fourier Transform of 1024 Qubits on Fiber Optics
Akihisa Tomita, Kazuo Nakamura
Quantum Fourier transform (QFT) is a key function to realize quantum computers. A QFT followed by measurement was demonstrated on a simple circuit based on fiber-optics. The QFT wa…
Single-photon interference experiment over 100 km for quantum cryptography system using a balanced gated-mode photon detector
Hideo Kosaka, Akihisa Tomita, Yoshihiro Nambu +2
We demonstrate single-photon interference over 100 km using a balanced gated-mode photon detector and a plug & play system for quantum key distribution. The visibility with 0.1 pho…
Schemes for generating W state of paths and W state of polarization photons
Bao-Sen Shi, Akihisa Tomita
In this paper, we give two very simple schemes to produce two kinds of W states, one kind is path W state with one photon and the other is multiphoton photon polarization W state.…
A simple way to detect the state transition caused by the nondiagonal abelian Berry phase
X. B. Wang, K. Matsumoto, H. Fan +2
In a nondegenerate syste, the abelian Berry's phase will never cause transitions among the Hamiltonian's eigenstate. However, in a degenerate syatem, it is well known that the stat…
Complete Bell state measurement with controlled photon absorption and quantum interference
A. Tomita
A solid state device to discriminate all the four Bell states is proposed. The device is composed of controlled absorption crystals, rotators, and retarders. The controlled absorpt…