A Special Place for Blog Lovers with a Touch of Science!

Enjoy our special posts in the fields of Earth & Planetary Sciences (EPS Blog) and Social Sciences & Arts (SSA Blog)

A Special Place for Blog Lovers with a Touch of Science!

New measurements quantifying qudits provide glimpse of quantum future

Credit: Getty images

Researchers develop method for measuring qudits encoded in quantum frequency combs

Using existing experimental and computational resources, a multi-institutional team has developed an effective method for measuring high-dimensional qudits encoded in quantum frequency combs, a type of photon source, on a single optical chip.

Although the word "qudit" might look like a typo, this lesser-known cousin of the qubit, or quantum bit, can carry more information and is more resistant to noise — key qualities needed to improve the performance of quantum networks, quantum key distribution systems and, eventually, the quantum internet.


Bits, Qubits, and Qudits

Classical computer bits categorize data as ones or zeroes, whereas qubits can hold values of one, zero or both — simultaneously — owing to superposition, a phenomenon that allows multiple quantum states to exist at the same time. The "d" in qudit stands for the number of different levels or values that can be encoded on a photon. Traditional qubits have two levels, but adding more levels transforms them into qudits.

Researchers at the Oak Ridge National Laboratory, Purdue University and the Swiss Federal Institute of Technology Lausanne fully characterized an entangled pair of eight-level qudits, which formed a 64-dimensional quantum space — quadrupling the previous record for discrete frequency modes. The U.S. National Science Foundation-supported results were published in Nature Communications.

"We've always known that it's possible to encode 10- or 20-level qudits or even higher using the colors of photons, or optical frequencies, but the problem is that measuring these particles is very difficult," said Hsuan-Hao Lu of ORNL. "We found an efficient and novel technique that is relatively easy to do on the experimental side."

Originally published in NSF

×
Stay Informed

When you subscribe to the blog, we will send you an e-mail when there are new updates on the site so you wouldn't miss them.

SGEM Vienna Art Conference 2022
Editor’s Pick: Mircea Eliade

Related Posts

EPS Recent Posts

21 November 2022
Earth & Planetary Sciences (EPS)
Credit: Getty images Researchers develop method for measuring qudits encoded in quantum frequency combs Using existing experimental and computational resources, a multi-institutional team has developed an effective method for measuring high-dimension...
56 Hits
14 November 2022
Earth & Planetary Sciences (EPS)
Credit: Getty images Distant quasar provides evidence of first-generation star that died in 'super-supernova' explosion Astronomers may have discovered the ancient chemical remains of the first stars to light up the universe. Using an analysis of a d...
85 Hits
11 November 2022
Earth & Planetary Sciences (EPS)
Credit: sgemviennagreen.org XXII SGEM GeoConference – "Green Sciences for Green Life" Sessions The host of this Green event is the Greenest City in the EU itself - Vienna city. Get ready to be amazed by the festive beauty of the Schönbrunn Palace, du...
33694 Hits