Publications (11)
Ferromagnetic levitation and harmonic trapping of a milligram-scale Yttrium Iron Garnet sphere
Maria Fuwa, Ryosuke Sakagami, Tsuyoshi Tamegai
We report passive magnetic levitation and three-dimensional harmonic trapping of a 0.3 milligram, 0.5 millimeter diameter Yttrium Iron Garnet sphere at 4 K. The gradient of an exte…
Entanglement swapping between discrete and continuous variables
Shuntaro Takeda, Maria Fuwa, Peter van Loock +1
We experimentally realize "hybrid" entanglement swapping between discrete-variable (DV) and continuous-variable (CV) optical systems. DV two-mode entanglement as obtainable from a…
Generation and Eight-port Homodyne Characterization of Time-bin Qubits for Continuous-variable Quantum Information Processing
Shuntaro Takeda, Takahiro Mizuta, Maria Fuwa +3
We experimentally generate arbitrary time-bin qubits using continuous-wave light. The advantage unique to our qubit is its compatibility with deterministic continuous-variable quan…
Analog of the Clauser-Horne-Shimony-Holt inequality for steering
Eric G. Cavalcanti, Christopher J. Foster, Maria Fuwa +1
The Clauser-Horne-Shimony-Holt (CHSH) inequality (and its permutations), are necessary and sufficient criteria for Bell nonlocality in the simplest Bell-nonlocality scenario: 2 par…
Gain tuning for continuous-variable quantum teleportation of discrete-variable states
Shuntaro Takeda, Takahiro Mizuta, Maria Fuwa +3
We present a general formalism to describe continuous-variable (CV) quantum teleportation of discrete-variable (DV) states with gain tuning, taking into account experimental imperf…
Noiseless conditional teleportation of a single photon
Maria Fuwa, Shunsuke Toba, Shuntaro Takeda +6
We experimentally demonstrate the noiseless teleportation of a single photon by conditioning on quadrature Bell measurement results near the origin in phase space and thereby circu…
Stable magnetic levitation of soft ferromagnets for macroscopic quantum mechanics
Maria Fuwa
We propose a system for passive magnetic levitation and three-dimensional harmonic trapping of soft ferromagnets. Our protocol utilizes the magnetic field gradient for vertical tra…
Superconducting Acousto-optic Phase Modulator
Ayato Okada, Rekishu Yamazaki, Maria Fuwa +9
We report the development of a superconducting acousto-optic phase modulator fabricated on a lithium niobate substrate. A titanium-diffused optical waveguide is placed in a surface…
Heralded creation of photonic qudits from parametric down conversion using linear optics
Jun-ichi Yoshikawa, Marcel Bergmann, Peter van Loock +7
We propose an experimental scheme to generate, in a heralded fashion, arbitrary quantum superpositions of two-mode optical states with a fixed total photon number based on weak…
Experimental Proof of Nonlocal Wavefunction Collapse for a Single Particle Using Homodyne Measurement
Maria Fuwa, Shuntaro Takeda, Marcin Zwierz +2
A single quantum particle can be described by a wavefunction that spreads over arbitrarily large distances, but it is never detected in two (or more) places. This strange phenomeno…
Deterministic quantum teleportation of photonic quantum bits by a hybrid technique
Shuntaro Takeda, Takahiro Mizuta, Maria Fuwa +2
Quantum teleportation allows for the transfer of arbitrary, in principle, unknown quantum states from a sender to a spatially distant receiver, who share an entangled state and can…