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The light field from a microcavity can be used to measure the displacement of a thin bar with an uncertainty that is close to the Heisenberg limit.

Tracking the exact location of an object is important in gravitational-wave detectors and optical cooling techniques. However, quantum physics imposes certain limits on the measurement precision. Tobias Kippenberg and his colleagues at the Swiss Federal Institute of Technology in Lausanne have devised an optomechanical device that measures the displacement of a tiny vibrating bar at room temperature with an uncertainty near the so-called Heisenberg limit. The precision of the sensor is nearly 10,000 times smaller than the zero-temperature fluctuations (zero-point motion) of the bar.

The Heisenberg uncertainty principle says—in practical terms—that any measurement of an object’s position will unavoidably give it a push that disturbs its momentum. To minimize this backaction, researchers have developed systems that couple the position of an object with the light field from an optical cavity.

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Nice new method in producing Q-Dots which seems to be more cost effective, efficient and reliable.


Large-scale technique to produce quantum dots.

Wearable Technology 2015-2025

A method to produce significant amounts of semiconducting nanoparticles for light-emitting displays, sensors, solar panels and biomedical applications has gained momentum with a demonstration by researchers at the Department of Energy’s Oak Ridge National Laboratory.

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Luv this article (science meets philosophical theory on the evolution of science); reminds me of an article that one of my Quantum friends shared yesterday on Linkedin Pulse.


Science is the biggest enterprise that man ever created. Of all the living things on this planet, man is the only one that seems to have started thinking about how this world works. To understand that he started this new venture, called Science, which was originally meant just to understand how this world works. Some exceptionally brilliant minds did accidentally stumble upon some understanding of the world’s laws like gravity, buoyancy, and others in the west while Indian sages had realised this much earlier.

Next step was to find out how the world works by doing some experiments. That was the stage when the Churches started obstructing “Science” as this kind of scientific enquiry, the Church felt, might interfere with religious beliefs. That is where the first conflict between religion and science started. The fall out was that scientists subconsciously developed an aversion to the God concept in religion and thus God was kept out of the scientific realm. Let us, therefore, think from now on. Science, then, was more of a hobby for the well to do. The leading lights of that generation were Isaac Newton and Albert Einstein. There were a host of others but less illustrious than these two. Newton’s Laws of deterministic predictability and Einstein’s laws of relativity together founded a world view of “space-time” constraints where everything else out with this space time module was rejected.

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Love this; Congrats to Michelle Simmons and her work on QC — Superstar females in STEM.


For her world-leading research in the fabrication of atomic-scale devices for quantum computing, UNSW Australia’s Scientia Professor Michelle Simmons has been awarded a prestigious Foresight Institute Feynman Prize in Nanotechnology.

Two international Feynman prizes, named in honour of the late Nobel Prize winning American physicist Richard Feynman, are awarded each year in the categories of theory and experiment to researchers whose work has most advanced Feynman’s nanotechnology goal of molecular manufacturing.

Professor Simmons, director of the UNSW-based Australian Research Council Centre of Excellence for Quantum Computation and Communication Technology, won the experimental prize for her work in “the new field of atomic-electronics, which she created”.

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Quantum mechanics is difficult to understand at the best of times, but new evidence suggests that the current standard view of how particles behave on the quantum scale could be very, very wrong.

In fact, the experiment hints that an alternative view predicted almost a century ago might have been right this whole time. And before you get too bummed about that, the good news is that, if confirmed, it would actually make quantum mechanics a whole lot simpler to understand.

So let’s step back for a second here and break this down. First thing’s first, this is just one study, and A LOT more replication and verification would be needed before the standard view comes crumbling down. So don’t go burning any text books just yet, okay? Good.

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Establishing the trend. Q-dot technology will be in all displays soon.


“Samsung Electronics will skip commercializing OLED for TVs and ho straight to QLED technology, perhaps as soon as 2009. Its strategy is to continue to develop its quantum-dot TVs, which are its current major products, and prepare to commercialize QLED technologies during this time.”

Read More at ET News

Want to read more stories like this?

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Nice.


Sandia National Laboratories has taken a first step toward creating a practical quantum computer, able to handle huge numbers of computations instantaneously.

Here’s the recipe:

A “donor” atom propelled by an is inserted very precisely in microseconds into an industry-standard silicon substrate.

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Scientists from ITMO University and Trinity College have designed an optically active nanosized supercrystal whose novel architecture can help separate organic molecules, thus considerably facilitating the technology of drug synthesis. The study was published in Scientific Reports (“Chiral quantum supercrystals with total dissymmetry of optical response”).

Structure of the Helical Chiral Supercrystal

Structure of the helical chiral supercrystal. (Image: ITMO University)

The structure of the new supercrystal is similar to a helix staircase. The supercrystal is composed of numerous rod-shaped quantum dots — tiny semiconductor pieces of about several nanometers in size. Importantly, unlike individual quantum dots, the assembly possesses the property of chirality. Thanks to this distinctive feature, such supercrystals can find wide application in pharmacology to identify chiral biomolecules.

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