Search Menu
Photonics Media Photonics Marketplace Photonics Spectra BioPhotonics EuroPhotonics Vision Spectra Photonics Showcase Photonics ProdSpec Photonics Handbook

It’s high “NOON” for microwave photons

Facebook Twitter LinkedIn Email Comments
An important milestone toward the realization of a large-scale quantum computer and further demonstration of a new level of the quantum control of light were accomplished by a team of scientists at the University of California, Santa Barbara (UCSB), Zhejiang University of China and NEC Corp. of Japan.

The researchers describe how they used a superconducting quantum integrated circuit to generate unique quantum states of light known as “NOON” states. Generated from microwave-frequency photons, the states were created and stored in two physically separated microwave storage cavities. They explain that quantum NOON states were created using one, two or three photons; all photons were located in one cavity, leaving the other cavity empty.

This chip contains the superconducting integrated circuit used to generate NOON microwave states. Courtesy of Erik Lucero, UCSB.

In this configuration, which is made possible by quantum mechanics, findings indicate that there is a 50 percent chance of seeing all the photons in one cavity and a 50 percent chance of not finding any. However, probing the cavity gently before looking inside it changes the quantum state, and the effect of probing can be detected even if the cavity is determined later to be empty. These findings were published in Physical Review Letters, Feb. 7, 2011 (doi: 10.1103/ PhysRevLett.106.060401).

“It’s kind of like the states are ghostly twins or triplets,” said Haohua Wang, a postdoctoral fellow in physics at UCSB. “They are always together, but somehow you never know where they are. They also have a mysterious way of communicating, so they always seem to know what is going to happen.”

The quantum integrated circuit, which includes superconducting quantum bits along with the microwave storage cavities, could eventually become part of a quantum computational architecture, the scientists concluded.

Photonics Spectra
Apr 2011
quantum mechanics
The science of all complex elements of atomic and molecular spectra, and the interaction of radiation and matter.
AmericasAsia-PacificCaliforniaChinaHaohua Wangintegrated circuitsJapanmicrowave frequency photonsmicrowave storage cavitiesnanoNEC CorporationNOON statesopticsquantum bitsquantum computersquantum control of lightquantum integrated circuitsquantum mechanicsquantum NOON statesquantum statesResearch & Technologysuperconducting quantum integrated circuitTech PulseUCSBUniversity of California Santa BarbaraZhejiang University

view all
Search more than 4000 manufacturers and suppliers of photonics products and services worldwide:

back to top
Facebook Twitter Instagram LinkedIn YouTube RSS
©2021 Photonics Media, 100 West St., Pittsfield, MA, 01201 USA, [email protected]

Photonics Media, Laurin Publishing
x Subscribe to Photonics Spectra magazine - FREE!
We use cookies to improve user experience and analyze our website traffic as stated in our Privacy Policy. By using this website, you agree to the use of cookies unless you have disabled them.