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Continuous-variable teleportation of a negative Wigner function
Ladislav Mišta, Radim Filip, Akira Furusawa
Teleportation is a basic primitive for quantum communication and quantum computing. We address the problem of continuous-variable (unconditional and conditional) teleportation of a…
Generation of squeezed light with monolithic optical parametric oscillator: Simultaneous achievement of phase matching and cavity resonance by temperature control
Hidehiro Yonezawa, Koyo Nagashima, Akira Furusawa
We generate squeezed state of light at 860 nm with a monolithic optical parametric oscillator. The optical parametric oscillator consists of a periodically poled KTiOPO_4 crystal,…
Reversing Quantum Nondemolition Interaction as Quantum Erasing
Yoshichika Miwa, Jun-ichi Yoshikawa, Ryuji Ukai +2
We reverse a quantum nondemolition (QND) interaction and restore the signal quantum state by measurement and feedforward. This operation corresponds to quantum erasing for continuo…
Demonstration of Cluster State Shaping and Quantum Erasure for Continuous Variables
Yoshichika Miwa, Ryuji Ukai, Jun-ichi Yoshikawa +3
We demonstrate experimentally how to remove an arbitrary node from a continuous-variable cluster state and how to shorten any quantum wires of such a state. These two basic operati…
Photonic quantum technologies
Jeremy L. O'Brien, Akira Furusawa, Jelena Vučković
The first quantum technology, which harnesses uniquely quantum mechanical effects for its core operation, has arrived in the form of commercially available quantum key distribution…
Demonstration of unconditional one-way quantum computations for continuous variables
Ryuji Ukai, Noriaki Iwata, Yuji Shimokawa +5
Quantum computing promises to exploit the laws of quantum mechanics for processing information in ways fundamentally different from today's classical computers, leading to unpreced…