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Search results for bell entanglement

Optics & Photonics Mar 23, 2021

A simple laser for quantum-like classical light

Tailoring light is much like tailoring cloth, cutting and snipping to turn a bland fabric into one with a desired pattern. In the case of light, the tailoring is usually done in the spatial degrees of freedom, such as its ...

Quantum Âé¶¹ÒùÔºics Mar 10, 2021

Playing games with quantum interference

As Richard Feynman famously put it, "the double slit experiment is absolutely impossible to explain in any classical way and has in it the heart of quantum mechanics. In reality, it contains the only mystery."

General Âé¶¹ÒùÔºics Mar 9, 2021

A device-independent protocol for more efficient random number generation

Recent advancements in the development of experimental Bell tests have enabled the implementation of a new type of device-independent random number generator. Remarkably, this new type of random number generators can be realized ...

Quantum Âé¶¹ÒùÔºics Feb 9, 2021

Quantum causal loops

Normally, causal influence is assumed to go only one way—from cause to effect—and never back from the effect to the cause—the ringing of a bell does not cause the pressing of the button that triggered it. Now, researchers ...

Quantum Âé¶¹ÒùÔºics Jan 8, 2021

Researchers realize efficient generation of high-dimensional quantum teleportation

In a study published in Âé¶¹ÒùÔºical Review Letters, a team led by academician Guo Guangcan from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) has made progress in high dimensional ...

Quantum Âé¶¹ÒùÔºics Dec 29, 2020

Metasurface enabled quantum edge detection

Metasurfaces provide unique platforms to realize exotic phenomena including negative refraction, achromatic focusing, and electromagnetic cloaking due to the engineered dielectric or metallic architectures. The intersection ...

Quantum Âé¶¹ÒùÔºics Dec 18, 2020

When light and atoms share a common vibe

An especially counter-intuitive feature of quantum mechanics is that a single event can exist in a state of superposition—happening both here and there, or both today and tomorrow.

Quantum Âé¶¹ÒùÔºics Sep 24, 2020

A question of quantum reality

Âé¶¹ÒùÔºicist Reinhold Bertlmann of the University of Vienna, Austria has published a review of the work of his late long-term collaborator John Stewart Bell of CERN, Geneva in EPJ H. This review, "Real or Not Real: that is the ...

Quantum Âé¶¹ÒùÔºics Aug 24, 2020

A new quantum paradox throws the foundations of observed reality into question

If a tree falls in a forest and no one is there to hear it, does it make a sound? Perhaps not, some say.

Quantum Âé¶¹ÒùÔºics Aug 10, 2020

Grasshopper jumping on Bloch sphere finds new quantum insights

New research at the University of Warwick has (pardon the pun) put a new spin on a mathematical analogy involving a jumping grasshopper and its ideal lawn shape. This work could help us understand the spin states of quantum-entangled ...

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