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In the world of quantum science, Alice and Bob have been talking to one another for years. Charlie joined the conversation a few years ago, but now with spacelike separation, scientists have measured that their communication occurs faster than the speed of light. For the first time, physicists have demonstrated the distribution of three entangled photons at three different locations (Alice, Bob and Charlie) several hundreds of meters apart, proving quantum nonlocality for more than two entangled photons.
MIT News Quantum Mechanics May Be Proven by Distant Quasars The Escapist MIT researchers have proposed an experiment involving the observation of distant quasars that could close a final loophole and prove our universe is governed by quantum...
Quantum mechanics has given birth to dozens of interpretations, which themselves need interpretations.
(Phys.org)—A team of researchers with members from Hokkaido and Osaka Universities in Japan has used quantum entanglement of photons to improve image results created using differential interference contrast ...
Quantum Microscope Uses Spooky Entangled Photons To See Better Popular Science The new microscope's creators think entangled photons could improve the technology scientists currently use to see transparent things under a microscope.
If you enjoyed my post from about three months ago on Hydrodynamic Quantum Analogs, or perhaps even if you didn’t, you will likely enjoy this new paper by Robert Brady and Ross Anderson at the University of Cambridge: “Why bouncing droplets are a pretty good model of quantum mechanics“. They … Continue reading →
Ars Technica Been there, done that: The problem with quantum research Ars Technica In the work, researchers entangled two nitrogen vacancies via their photon emissions.
The quantum phenomenon known as entanglement keeps spreading its arms to hold ever more particles in its spooky embrace. Quantum entanglement is an effect through which multiple ...
New device could be used in quantum processors
What Would Happen if a Quantum Cheshire Cat Were to Visit the Leisure Hive? Happy Holidays, Everyone!
Is there a connection between quantum mechanics and Einstein's general theory of relativity? (RT @TapasDeCiencia: Los físicos hallan una conexión entre el entrelazamiento cuántico y los agujeros de gusano.
“It’s 10:00 pm, do you know where your photons are?

Using a frequency eraser, researchers have, for the first time, entangled two independent photons with different frequencies.
How do you make something that has never existed before? Physicists Jeff Kimble and ChenLung take us on an exhilarating adventure of exploration. Subscribe:... ("If you know what you're doing, don't do it!
Enter quantum weirdness: waveparticle duality, nonlocality, quantum tunneling, multiple worlds, retrocausality, quantum teleportation, entanglement, indeterminism, and observerdependent results. ...
Synopsis: Quantum Legos Physics Quantum computing offers great potential information processing power by harnessing the entanglement of many qubits in service of useful tasks.
Culturally, we have an odd relationship with quantum mechanics. Writers of popular accounts often like to emphasize the strangeness of quantum physics, talking about Schrödinger's cat, entanglement, and the like.
Meet the Parents of Quantum Gravity: Quantum Field Theory and General Relativity Quantum Field Theory (QFT) and General Relativity (GR) form the theoretical and mathematical foundations for modern physics and cosmology. QFT is an extension of Quantum...
Our fact or fiction practical side of quantum mechanics quiz will test your knowledge on the field. Try our practical quantum mechanics quiz here. (Is teleportation possible with the help of quantum entanglement?
Reevaluating Your Quantum Upbringing You may recall being told by your parents, as you were growing up, outmoded ideas or outright misconceptions about quantum mechanics. Examples may have included: the uncertainty principle is due to momentum imparted...
Our biggest questions raised by quantum physics will explore the complexity and uncertainty of this field. Learn more about quantum physics here. (10 Biggest Questions Raised by Quantum Physics!
Skepticism, Critical Thinking, and Quantum Physics I have decided to expand this website a little and address quantum woo and quantum mysticism more directly. Quantum woo is the justification of irrational beliefs using confused, vague, and ambiguous...

If they succeed, the greek phrase "Audaces Fortuna Juvat" will be applicable to these experimentalists (Fortune Favors the Bold).
It's not clear to me that it is actually "Pitting the two experiments against each other". But, experiments that can show gravitational effects and quantum effects simultaneously will be very interesting and important. Some time ago, I read a paper about a proposed experiment to combine gravitational timedilation and the double slit experiment (in the form of an interferometer). The idea is to have the two paths of the interferometer at different heights. The different rates of time should then impact the phases of each path when they reach the recombination point. Unfortunately, I have not been able to relocate the paper.
One of the basic properties of quantum mechanics is that a particle (or quantum system made up of a group of particles) can act as if it is in a superposition of possible outcomes. The most common example is the story of Schrodinger's cat: a cat is sealed in a box; also in the box is a radioactive isotope, a hammer, and a vial of poison; if an atom decays in a certain period of time, the hammer breaks the vial and the cat is killed. So the cat is in a superposition of dead and alive states.
Now, superposition does not really work with something as large as a cat, it decoheres to a classical state too quickly due to interactions of all the particles it is made of, with the environment. That is why they have to use a tiny system in this experiment.
So, in this experiment, the "ball" will be in a superposition of having been struck and not struck by a photon. The scientists are trying to design an experiment that is sensitive enough to measure the curvature of spacetime due to the vibrating ball. They want to see if spacetime is also in a superposition of curved and not curved by the vibrating (and not vibrating) ball.
What makes this so immensely challenging is that the vibrating quantum system has to be very small so that the superposition can be maintained. And that makes it very, very hard to measure the teenytiny effect on spacetime. The cool thing about these experiments is they will be directly observing quantum and gravitational effects simultaneously, both affecting the outcome of the experiment. This could provide input to theorists who are trying to reconcile quantum mechanics with general relativity and come up with a theory of quantum gravity.