Frequency modulation accelerates the research of quantum technologies

May 31, 2017

Many modern technological advances and devices are based on understanding quantum mechanics. Compared to semiconductors, hard disk drives or lasers, quantum devices are different in the sense that they directly harness quantum states. A big goal of the field is to develop a working quantum computer theorized to outperform traditional computers in certain difficult computational tasks. Researchers at the University of Oulu and Aalto University have published a review article about physics related to quantum devices in Reports on Progress in Physics.

A central concept in is that of energy level. When a quantum mechanical system such as an atom absorbs a quantum of energy from light, it is excited from a lower to a higher energy level. Changing the separation between the energy levels is called frequency modulation. In , frequency modulation is utilized in controlling interactions, inducing transitions among quantum states and engineering artificial energy structures.

"The basis of quantum mechanical frequency modulation has been known since the 1930s. However, the breakthrough of various quantum technologies in the 2000s has created a need for better theoretical tools for the frequency modulation of ," says Matti Silveri, presently a postdoctoral researcher from University of Oulu.

Understanding and using frequency modulation is important for developing more accurate quantum devices and faster quantum gates for small-scale quantum computers in the near future. The research field of quantum devices and computing is rapidly growing and it has recently attracted investments from major technology companies such as Google, Intel, IBM and Microsoft.

"We wanted to review the recent experimental and theoretical progress with various kinds of quantum systems under frequency modulation. We hope to accelerate the research in this field," says docent Sorin Paraoanu from Aalto University.

The article discusses the physics of in superconducting quantum circuits, ultracold atoms, nitrogen-vacancy centers in diamond and nanoelectromechanical resonators. With these platforms, energy levels can be accurately modulated with voltage, microwaves or lasers in experimental settings. The theoretical results of the article are general and can be applied to various quantum systems.

Explore further: Unpolarized single-photon generation with true randomness from diamond

More information: M P Silveri et al, Quantum systems under frequency modulation, Reports on Progress in Physics (2017). DOI: 10.1088/1361-6633/aa5170

Related Stories

Refrigerator for quantum computers discovered

May 8, 2017

The global race towards a functioning quantum computer is on. With future quantum computers, we will be able to solve previously impossible problems and develop, for example, complex medicines, fertilizers, or artificial ...

Noise is not necessarily detrimental to quantum devices

February 4, 2013

The researches of the Aalto University and the University of Oulu have succeeded to simulate a phenomenon called motional averaging, which demonstrates that in certain conditions externally-induced fast fluctuations in energy ...

The exciting new age of quantum computing

October 25, 2016

What does the future hold for computing? Experts at the Networked Quantum Information Technologies Hub (NQIT), based at Oxford University, believe our next great technological leap lies in the development of quantum computing.

Recommended for you

Quantum data takes a ride on sound waves

September 22, 2017

Yale scientists have created a simple-to-produce device that uses sound waves to store quantum information and convert it from one form to another, all inside a single, integrated chip.

A way to measure and control phonons

September 22, 2017

(Phys.org)—A team of researchers with the University of Vienna in Austria and Delft University of Technology in the Netherlands has developed a technique using photons for controlling and measuring phonons. In their paper ...

Gravitational waves may oscillate, just like neutrinos

September 21, 2017

(Phys.org)—Using data from the first-ever gravitational waves detected last year, along with a theoretical analysis, physicists have shown that gravitational waves may oscillate between two different forms called "g" and ...

Detecting cosmic rays from a galaxy far, far away

September 21, 2017

In an article published today in the journal Science, the Pierre Auger Collaboration has definitively answered the question of whether cosmic particles from outside the Milky Way Galaxy. The article, titled "Observation of ...

Physicists publish new findings on electron emission

September 21, 2017

Even more than 100 years after Einstein's explanation of photoemission the process of electron emission from a solid material upon illumination with light still poses challenging surprises. In the report now published in ...

0 comments

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.