Thread Rating:
  • 5 Vote(s) - 4.2 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Physicists move one step closer to quantum computing
Physicists at UC (University of California) Santa Barbara have made an important advance in electrically controlling quantum states of electrons, a step that could help in the development of quantum computing.

The researchers have demonstrated the ability to electrically manipulate, at gigahertz rates, the quantum states of electrons trapped on individual defects in diamond crystals.

This could aid in the development of quantum computers that could use electron spins to perform computations at unprecedented speed.

Using electromagnetic waveguides on diamond-based chips, the researchers were able to generate magnetic fields large enough to change the quantum state of an atomic-scale defect in less than one billionth of a second.

The microwave techniques used in the experiment are analogous to those that underlie magnetic resonance imaging (MRI) technology.

The key achievement in the current work is that it gives a new perspective on how such resonant manipulation can be performed.

"We set out to see if there is a practical limit to how fast we can manipulate these quantum states in diamond," said lead author Greg Fuchs, a postdoctoral researcher at UCSB.

"Eventually, we reached the point where the standard assumptions of magnetic resonance no longer hold, but to our surprise we found that we actually gained an increase in operation speed by breaking the conventional assumptions," he added.

While these results are unlikely to change MRI technology, they do offer hope for the nascent field of quantum computing.

"From an information technology standpoint, there is still a lot to learn about controlling quantum systems," said David Awschalom, principal investigator and professor of physics, electrical and computer engineering at UCSB.

"Still, it''s exciting to stand back and realize that we can already electrically control the quantum state of just a few atoms at gigahertz rates -- speeds comparable to what you might find in your computer at home," he added.

Thanks given by:

Possibly Related Threads…
Thread Author Replies Views Last Post
  General News: How to recover deleted WhatsApp messages on Android. Step-by-Step guide nairrk 0 137 08-30-2020, 07:52 AM
Last Post: nairrk
  General News: Firefox 60 for Android Brings Quantum CSS Engine, New Option to View Page Source nairrk 0 748 05-06-2018, 07:48 AM
Last Post: nairrk
  General News: Mozilla launches new Firefox Quantum browser for faster surfing nairrk 0 725 11-15-2017, 12:48 PM
Last Post: nairrk
  General News: Here’s a closer look at WhatsApp end-to-end encryption and how it’s securing messages nairrk 0 574 08-23-2017, 09:54 AM
Last Post: nairrk
  General News: Sent a message by mistake? WhatsApp closer to introducing 'Recall' feature nairrk 0 624 06-07-2017, 03:45 PM
Last Post: nairrk
  General News: Facebook to Kill Photo Sync; Asks Users to Move to Moments App nairrk 0 646 12-15-2015, 12:54 PM
Last Post: nairrk
  A closer look at Apple Watch SRK 0 528 03-11-2015, 12:27 PM
Last Post: SRK
Information DTH News: India set to roll out first lot of low-cost computing device nairrk 2 1,760 06-10-2011, 09:55 AM
Last Post: nairrk
Information Help: Google, Mozilla step up privacy feature in browsers nairrk 0 1,165 01-25-2011, 05:33 PM
Last Post: nairrk
  Help: Hyper-fast quantum computers could be reality soon nairrk 0 827 01-22-2011, 09:38 AM
Last Post: nairrk

Forum Jump:

Users browsing this thread: 1 Guest(s)