Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Quantum leap in lasers at Dartmouth brightens future for quantum computing

22.07.2014

Dartmouth scientists and their colleagues have devised a breakthrough laser that uses a single artificial atom to generate and emit particles of light.

The laser may play a crucial role in the development of quantum computers, which are predicted to eventually outperform today's most powerful supercomputers.

The study appears in the journal Physical Review B.

The new laser is the first to rely exclusively on superconducting electron pairs. "The fact that we use only superconducting pairs is what makes our work so significant," says Alex Rimberg, a professor of physics and astronomy at Dartmouth. Superconductivity is a condition that occurs when electricity can travel without any resistance or loss of energy.

"The artificial atom is made of nanoscale pieces of superconductor," says Rimberg. "The reason for using the artificial atom is that you can now make it part of an electrical circuit on a chip, something you can't do with a real atom, and it means we have a much clearer path toward interesting applications in quantum computing."

Light from the laser is produced by applying electricity to the artificial atom. This causes electrons to hop across the atom and, in the process, produce photons that are trapped between two superconducting mirrors. The process is "invisible to the human eye; the hopping electrons dance back and forth across the atom in time with the oscillating waves of the light," Rimberg says.

With the new laser, electrical energy is converted to light that has the ability to transmit information to and from a quantum computer. "With a quantum computer, you have to get the information from point A to point B," he says.

"A computer that does a calculation but has no way of getting the information anywhere else isn't particularly useful. Our laser might offer an easy way of producing the kinds of weird quantum states of light that could be used to carry quantum information around."

Much the laser development came out of the thesis work of one of Rimberg's former graduate students, Fei Chen, first author on the Physical Review B paper, with help from another graduate student Juliang Li, and postdoctoral researcher Joel Stettenheim.

###

Professor Alex Rimberg is available to comment at Alexander.J.Rimberg@dartmouth.edu

Broadcast studios: Dartmouth has TV and radio studios available for interviews. For more information, visit: http://www.dartmouth.edu/~opa/radio-tv-studios/

John Cramer | Eurek Alert!
Further information:
http://www.dartmouth.edu

Further reports about: Quantum Superconductivity artificial astronomy electricity electrons lasers nanoscale resistance

More articles from Physics and Astronomy:

nachricht Astronomers find unexpected, dust-obscured star formation in distant galaxy
24.03.2017 | University of Massachusetts at Amherst

nachricht Gravitational wave kicks monster black hole out of galactic core
24.03.2017 | NASA/Goddard Space Flight Center

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

Im Focus: Researchers Imitate Molecular Crowding in Cells

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.

Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Argon is not the 'dope' for metallic hydrogen

24.03.2017 | Materials Sciences

Astronomers find unexpected, dust-obscured star formation in distant galaxy

24.03.2017 | Physics and Astronomy

Gravitational wave kicks monster black hole out of galactic core

24.03.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>