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NIST team probes indestructible quantum states that may aid quantum computing


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NIST team probes indestructible quantum states that may aid quantum computing
Schematic of quantum Hall edge states in graphene probed by an atomic force microscope. In the interior of the graphene sheet, electrons under the influence of a perpendicular applied magnetic field are constrained to undergo circular motion. This turns the interior of the graphene sheet into a poor electrical conductor and even into an insulator under certain conditions. In contrast, along the boundary of the graphene, so-called topologically protected edge states provide runways for charge carriers to flow easily, creating conducting edge channels.
Credit:
Sungmin Kim/NIST ....

Joseph Stroscio , Nikolai Zhitenev , Johannes Schwenk , Hall States , Sungmin Kim , National Institute Of Standards , Nature Communications , Atomic Force Microscopy , Nobel Prizes , National Institute , Daniel Walkup , Edge Channels , Broken Symmetry Quantum Hall States , Atomic Force , Nature Communications , ஜோஹன்னஸ் ஸ்ச்சுவேங்க் , தேசிய நிறுவனம் ஆஃப் தரநிலைகள் , இயற்கை தகவல்தொடர்புகள் , அணு படை நுண்ணோக்கி , நோபல் ப்ரைஸஸ் , தேசிய நிறுவனம் , டேனியல் நடைபயிற்சி , அணு படை ,

How Quantum Physics Allows Us To See Back Through Space And Time

If it weren t for a subatomic quantum rule, our Universe would be vastly different. ....

Big Bang , பெரியது இடி ,

Current trend reversed


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Current trend reversed
The demonstration that a tiny cloud of atoms can be turned from a heat engine into a cooler by cranking up the interactions between the particles provides both deep fundamental insight and a possible template for more efficient thermoelectric devices.
Artistic impression of the experiment in which Häusler and colleagues first heat one of two quantum-gas clouds and then connect them with a two-dimensional channel, such that they can equilibrate.
(Graphics: D. Husmann & S. Häusler, ETH Zurich)
When a piece of conducting material is heated up at one of its ends, a voltage difference can build up across the sample, which in turn can be converted into a current. This is the so-called Seebeck effect, the cornerstone of thermoelectric effects. In particular, the effect provides a route to creating work out of a temperature difference. Such thermoelectric engines do not have any movable part and are therefore convenient power sources ....

Tilman Esslinger , Institute For Quantum Electronics , Quantum Electronics , Eth Zurich , நிறுவனம் க்கு குவாண்டம் மின்னணுவியல் , குவாண்டம் மின்னணுவியல் , எத் ஸுரி ,