0

Scientists add a peephole to Schrödinger’s box

NewImage

National Monitor has the story about a new direct measurement process that will allow physicists to measure quantum states quickly and accurately.

Scientists at the University of Rochester have begun to apply a faster, single-experiment measurement process to multidimensional quantum states known as direct measurement. Previously, measuring a 27-dimension quantum state required a costly, time consuming process called quantum tomography that was akin to creating a 3D image from many 2D images.

The genius of direct measurement lies in its two-stage measuring process. Typically, measuring a quantum state changes it irreversibly. For the first, or “weak” stage of the direct measurement process, scientists measure the state so gently that the system is only slightly altered and doesn’t result in the collapse of the wavefunction. Because it remains intact, this allows a subsequent, or “strong” measurement of the other variable.

“It is sort of like peeking into the box to see if Schrödinger’s cat is alive, without fully opening the box,” said lead author Dr. Mehul Malik, currently a post-doctoral research fellow at the University of Vienna and who was a Ph.D. in Boyd’s group when the work was performed. “The weak measurement is essentially a bad measurement, which leaves you mostly uncertain about whether the cat is alive or dead. It does, however, give partial information on the health of the cat, which when repeated many times can lead to near certain information as to whether the cat is alive or dead.”

“Schrödinger’s cat” is a thought experiment, sometimes described as a paradox, devised by Erwin Schrödinger in 1935. It illustrates what he saw as the problem of the Copenhagen interpretation of quantum mechanics applied to everyday objects. The scenario presents a cat that may be both alive and dead, depending on an earlier random event. Although the experiment was never meant to be taken literally, similar principles have been researched and used in practical applications.

Read more.


Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.

Join 8,500+ makers on Adafruit’s Discord channels and be part of the community! http://adafru.it/discord

CircuitPython – Python on Microcontrollers is here!

Have an amazing project to share? Join the SHOW-AND-TELL every Wednesday night at 7:30pm ET on Google+ Hangouts.

Join us every Wednesday night at 8pm ET for Ask an Engineer!

Follow Adafruit on Instagram for top secret new products, behinds the scenes and more https://www.instagram.com/adafruit/


Maker Business — Rethink Robotics closes shop. Long live collaborative robots #makerbusiness

Wearables — Cleaning is key

Electronics — Serial overkill

Biohacking — Biohacking Resources – Books, Talks and Podcasts

Python for Microcontrollers — CircuitPython @ Hackaday SuperCon #ICYMI @circuitpython @micropython @ThePSF #Python

Get the only spam-free daily newsletter about wearables, running a "maker business", electronic tips and more! Subscribe at AdafruitDaily.com !



No Comments

No comments yet.

Sorry, the comment form is closed at this time.