Featured Research

from universities, journals, and other organizations

Headway towards quantum information transfer via nanomechanical coupling

Date:
September 23, 2013
Source:
University of California - Santa Barbara
Summary:
Fiber optics has made communication faster than ever, but the next step involves a quantum leap –– literally. In order to improve the security of the transfer of information, scientists are working on how to translate electrical quantum states to optical quantum states in a way that would enable ultrafast, quantum-encrypted communications.

This is a scanning electron micrograph of the device showing the mechanically suspended optomechanical crystal (blue) with electrodes (yellow) and the photonic circuit (red).
Credit: Joerg Bochmann and Amit Vainsencher, UCSB

Fiber optics has made communication faster than ever, but the next step involves a quantum leap -- literally. In order to improve the security of the transfer of information, scientists are working on how to translate electrical quantum states to optical quantum states in a way that would enable ultrafast, quantum-encrypted communications.

Related Articles


A UC Santa Barbara research team has demonstrated the first and arguably most challenging step in the process. The paper, published in Nature Physics, describes a nanomechanical transducer that provides strong and coherent coupling between microwave signals and optical photons. In other words, the transducer is an effective conduit for translating electrical signals (microwaves) into light (photons).

Today's high-speed Internet converts electrical signals to light and sends it through optical fibers, but accomplishing this with quantum information is one of the great challenges in quantum physics. If realized, this would enable secure communication and even quantum teleportation, a process by which quantum information can be transmitted from one location to another.

"There's this big effort going on in science now to construct computers and networks that work on the principles of quantum physics," says lead author Jörg Bochmann, a postdoctoral scholar in UCSB's Department of Physics. "And we have found that there actually is a way to translate electrical quantum states to optical quantum states."

The new paper outlines the concept and presents a prototype device, which uses an optomechanical crystal implemented in a piezoelectric material in a way that is compatible with superconducting qubits, quantum analogs of classical bits. Operating the device at the single phonon limit, the scientists were able generate coherent interactions between electrical signals, very high frequency mechanical vibrations, and optical signals.

Although the first prototype of the transducer has not been operated in the quantum realm, that is, in fact, the next step for the research effort. "In this paper, we're characterizing the system using classical electrical and optical signals and find that the essential parameters look very promising," says Bochmann. "In the next step, we would have to actually input quantum signals from the electrical side and then check whether the quantum properties are preserved in the light."

According to the authors, their prototype transducer is fully compatible with superconducting quantum circuits and is well suited for cryogenic operation. "The coupled dynamics of the system should be the same at low temperatures as in our room temperature measurements, albeit with a lower thermal background," said co-author Andrew Cleland, a professor of physics and associate director of the California Nanosystems Institute at UCSB. "Genuine quantum features and non-classical mechanical states will emerge when we couple a superconducting qubit to the transducer.

"We believe that combining optomechanics with superconducting quantum devices will enable a new generation of on-chip quantum devices with unique capabilities, as well as opening an exciting pathway for realizing entangled networks of electronic and photonic quantum systems," Cleland said.


Story Source:

The above story is based on materials provided by University of California - Santa Barbara. Note: Materials may be edited for content and length.


Journal Reference:

  1. Joerg Bochmann, Amit Vainsencher, David D. Awschalom, Andrew N. Cleland. Nanomechanical coupling between microwave and optical photons. Nature Physics, 2013; DOI: 10.1038/nphys2748

Cite This Page:

University of California - Santa Barbara. "Headway towards quantum information transfer via nanomechanical coupling." ScienceDaily. ScienceDaily, 23 September 2013. <www.sciencedaily.com/releases/2013/09/130923143730.htm>.
University of California - Santa Barbara. (2013, September 23). Headway towards quantum information transfer via nanomechanical coupling. ScienceDaily. Retrieved January 27, 2015 from www.sciencedaily.com/releases/2013/09/130923143730.htm
University of California - Santa Barbara. "Headway towards quantum information transfer via nanomechanical coupling." ScienceDaily. www.sciencedaily.com/releases/2013/09/130923143730.htm (accessed January 27, 2015).

Share This


More From ScienceDaily



More Computers & Math News

Tuesday, January 27, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Cablevision Enters Wi-Fi Phone Fray

Cablevision Enters Wi-Fi Phone Fray

Reuters - Business Video Online (Jan. 26, 2015) — The entry by Cablevision and Google could intensify the already heated price wars for mobile phone service. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
Hector the Robot Mimics a Giant Stick Insect

Hector the Robot Mimics a Giant Stick Insect

Reuters - Innovations Video Online (Jan. 26, 2015) — A robot based on a stick insect can navigate difficult terrain autonomously and adapt to its surroundings. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
Scientists Model Flying, Walking Drone After Vampire Bats

Scientists Model Flying, Walking Drone After Vampire Bats

Buzz60 (Jan. 26, 2015) — Swiss scientists build a new drone that can both fly and walk, modeling it after the movements of common vampire bats. Jen Markham (@jenmarkham) has the story. Video provided by Buzz60
Powered by NewsLook.com
Malaysia Airlines Hack: Lizard Squad, ISIS Involved?

Malaysia Airlines Hack: Lizard Squad, ISIS Involved?

Newsy (Jan. 26, 2015) — Malaysia Airlines on Sunday experienced website outages and what appeared to be an attack by hacker group Lizard Squad. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

    Health News

    Environment News

    Technology News



    Save/Print:
    Share:  

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile iPhone Android Web
    Follow Facebook Twitter Google+
    Subscribe RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins