sensor switches

Diamonds coupled using quantum physics

Atomic defects in diamonds can be used as quantum memories. Researchers at TU Wien for the first time have succeeded in coupling the defects in various diamonds using quantum physics.

Diamonds with minute flaws could play a crucial role in the future of quantum technology. For some time now, researchers at TU Wien have been studying the quantum properties of such diamonds, but only now have they succeeded in coupling the specific defects in two such diamonds with one another. This is an important prerequisite for the development of new applications, such as highly sensitive sensors and switches for quantum computers. The results of the research will now be published in the journal ‘Physical Review Letters’.

In search of a suitable quantum system

“Unfortunately, quantum states are very fragile and decay very quickly”, explains Johannes Majer, head of the hybrid quantum research group, based at the Institute of Atomic and Subatomic Physics at TU Wien. For this reason, in-depth research is being carried out with the aim of finding quantum systems that can be used for technical applications. Even though there are some promising candidates with particular advantages, up until now there has been no system that fulfils all of the requirements simultaneously.

“Diamonds with very specific defects are one potential candidate for making quantum computers a reality”, says Johannes Majer. A pure diamond is made up solely of carbon atoms. In some diamonds, however, there can be points where there is a nitrogen atom instead of a carbon atom and neighbouring this, within the atomic structure of the diamond, there is an anomaly where there is no atom at all – this is referred to as a ‘vacancy’. This defect, consisting of the nitrogen atom and vacancy, forms a quantum system with a very long-lasting state, making diamonds with these particular flaws ideally suited to quantum experiments.

It all depends on the coupling

One important pre-requisite for many quantum technological applications is indeed the ability to couple such quantum systems together, which up until now has scarcely been possible for diamond systems. “The interaction between two such nitrogen-vacancy defects is extremely weak and only has a reach of around 10 nanometres”, says Majer.

However, this feat has now been achieved; albeit with the help of a superconducting quantum chip that produces microwave radiation. For a number of years now, the team at TU Wien has been investigating how diamonds can be manipulated with the help of microwaves: “billions of nitrogen-vacancy defects in diamonds are coupled collectively with a microwave field”, says Majer. “In this way, the quantum state of the diamonds can be manipulated and read out.”

Now, the team has succeeded in taking the next step: they were able to couple two different diamonds, one at each end of the chip, thus producing an interaction between the two diamonds. “This interaction is mediated by the microwave resonator in the chip in between; here, the resonator plays a similar role to that of a data bus in a regular computer”, says Johannes Majer.

The coupling between the two diamonds can be switched on and off selectively: “the two diamonds are rotated against each other at a certain angle”, reports Thomas Astner, the lead author of the current work. “Additionally, a magnetic field is applied, with the direction playing a decisive role: if both diamonds are aligned at the same angle within the magnetic field, then they can be coupled using quantum physics. With other magnetic field directions, it is possible to investigate the individual diamonds without coupling”. The first steps in the experiment were taken by Noomi Peterschofsky as part of her undergraduate thesis. Thomas Astner and Stefan Nevlacsil subsequently succeeded in demonstrating the coupling of the diamonds in an experiment as part of their Master’s thesis.

Coherent Coupling of Remote Spin Ensembles via a Cavity Bus
T. Astner, S. Nevlacsil, N. Peterschofsky, A. Angerer, S. Rotter, S. Putz, J. Schmiedmayer, and J. MajerPhys. Rev. Lett. 118, 140502 – Published 5 April 2017

TU Wien

Hypothermia - Chapter 1

Mike x Reader

Prologue - Next Chapter

Blackwoods Pines was as cold as ever. You shivered as you stepped off the shuttle bus, wrapping your coat around you even tighter.

“Well, it’s a little chilly, isn’t it?” Mike said as he stepped off after you. “I’ll never understand why the Washingtons decided to buy a mountain in Canada. I would have gone for an island in the Bahamas.”

“Save it, Mike, I know you love the snow,” you told him as you opened the gate to the path.

“No no no, good lady, you’re mistaken! I just love kicking your ass in snowball fights.”

He walked in front of you, giving you a chance to stoop over and form a snowball before pitching it at his head. Mike gave out a high pitched yelp as some of the ice slipped down his collar. “I’m sorry, you were saying?” you asked innocently.

He narrowed his eyes and pointed at you, “Sneaky.”

You shrugged as you reached the large iron gate that lead to the cable car station. He put one hand on the metal and tugged, but it didn’t move. He made a confused noise and began pulling a little harder.

“Having trouble?” you asked teasingly.

“It won’t budge.”

You tried as well, but even with both of your strength combined, the gate remained shut.  “Is it locked?” you asked.

“I think it’s just jammed,” Mike said. He ran over to the stone wall on one side of it and crouched down. “Come on, I’ll help you over.”

“What?” you whined. After a beat, you walked over to him sighing in defeat. “Goddammit.” You stepped into his cupped hands and he raised you up to the top. You shimmied your lower body as you tried to make it over the wall, kicking Mike in the face lightly when you heard him whistle at you.

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In November of last year, Steve appeared on LA Talk Radio to explain the layout of his custom strat and pedalboard -

Originally this guitar came with Lace Sensors.  The toggle switch was originally a switch to kick in a mid boost.  Later, when doing more studio work in front of the computer, Steve was getting a lot of interference from the computers in the studio, so he had Suhr noice cancelling pickups installed.  He took out the mid boost and made the switch turn the noise cancelling ability on or off.  So Steve can switch between a “single coil” type sound or a “humbucking sound” in essence.  In both modes, the guitar had a lot of top end and had that “glassy, chimey” sound of a great strat.  We have fluorescent lights in the studio and the guitar was pretty quiet, with the switch kicked in, even with those lights!

Steve showing some of the cool sounds he can get from this strat.  This guitar sounds great and you can see the custom shop quality throughout! Steve was mainly a Gibson player until Bobby Fernandez turned him onto this guitar in the 90’s.

Hana Apple’s Hazel Custom (customized in universe from a standard Hazel, another modified build I’ll post later because I don’t have it built yet. Irl, customized from Hazel Custom)

The stock Hazel is a Titan Company high mobility unit. Hana Apple made several modifications for her command unit, including:

Added gatling pods for additional firepower

Advanced head- mounted sensor unit

Boosters switched from static mount to sub-arms and equipped with phase capacitors, allowing them to be used as a powerful melee weapons as well as defensive shields.

Armament shared with the production type Hazel include:

Beam SMG w/spare ammo packs

Shoulder-mounted grenade launchers

Beam saber

Titan Company is a protagonist merc group dedicated to fighting an expansionist empire.

chumguzzle  asked:

HD rumble has some good use with Mario Odyssey using it to enhance the general feel of the game, but has anything used the IR sensor besides 1-2-Switch? I honestly can't see it being used for anything but a future WarioWare game.

Nintendo said it can detect distance and even read shapes, so it might have a bit of a purpose for party game gimmicks or something with simple Amiibo-like figures.

Diamond Film Opens New Possibilities For Miniscule Machines

by Txchnologist staff

Diamond may be a microelectromechanical system’s best friend.

Tiny MEMs, which can measure just microns across, are showing up as parts of sensors, switches and actuators in products from inkjet printers to car airbags and mobile devices. The miniature machines are shaping up to be a major component in the coming connected world.

The problem is that most MEMs out there right now are made of silicon, a brittle material that quickly wears down when it is being used as a moving part. 

We’ve already featured researchers who are looking to get past that major limitation, including one team that is making experimental MEMs out of nickel alloy. Now scientists at several institutions including Argonne National Lab say they may have another option.

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