Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

A quantum entanglement between two physically separated ultra-cold atomic clouds

17.05.2018

Science publishes the study of the UPV/EHU-University of the Basque Country and the University of Hannover

The prestigious journal Science has echoed a novel experiment in the field of quantum physics in which several members of the Quantum Information Theory and Quantum Metrology research group of the Department of Theoretical Physics and History of Science at the UPV/EHU's Faculty of Science and Technology participated, led by Géza Tóth, Ikerbasque Research Professor, and carried out at the University of Hannover. In the experiment, they achieved quantum entanglement between two ultra-cold atomic clouds, known as Bose-Einstein condensates, in which the two ensembles of atoms were spatially separated from each other.


Illustration of the quantum entanglement achieved between the two clouds of atoms starting from a single Bose-Einstein condensate.

Credit: Iagoba Apellaniz. UPV/EHU

Quantum entanglement was discovered by Schrödinger and later studied by Einstein and other scientists in the last century. It is a quantum phenomenon that has no counterparts in classical physics. The groups of entangled particles lose their individuality and behave as a single entity. Any change in one of the particles leads to an immediate response in the other, even if they are spatially separated. "Quantum entanglement is essential in applications such as quantum computing, since it enables certain tasks to be performed much faster than in classical computing," explained the leader of the Quantum Information Theory and Quantum Metrology group Géza Toth.

Unlike the way in which quantum entanglement between clouds of particles has been created up to now, and which involves using incoherent and thermal clouds of particles, in this experiment they used a cloud of atoms in the Bose-Einstein condensate state. As Tóth explained, "Bose-Einstein condensates are achieved by cooling down the atoms to very low temperatures, close to absolute zero. At that temperature, all the atoms are in a highly coherent quantum state; in a sense, they all occupy the same position in space. In that state quantum entanglement exists between the atoms of the ensemble." Subsequently, the ensemble was split into two atomic clouds. "We separated the two clouds from each other by a distance, and we were able to demonstrate that the two parts remained entangled with each other," he continued.

The demonstration that entanglement can be created between two ensembles in the Bose-Einstein condensate state could lead to an improvement in many fields in which quantum technology is used, such as quantum computing, quantum simulation and quantum metrology, since these require the creation and control of large ensembles of entangled particles. "The advantage of cold atoms is that it is possible to create highly entangled states containing quantities of particles outnumbering any other physical systems by several orders of magnitude, which could provide a basis for large scale quantum computing," said the researcher.

###

Additional information

The experiment was carried out at the University of Hannover by Carsten Klempt and the members of his group Karsten Lange, Jan Peise, Bernd Lücke and Ilka Kruse. The group of Géza Tóth of the Department of Theoretical Physics and History of Science at the UPV/EHU, included Giuseppe Vitagliano, Iagoba Apellaniz and Matthias Kleinmann; they developed a criterion that verified the presence of quantum entanglement.

Bibliographic reference

Karsten Lange, Jan Peise, Bernd Lücke, Ilka Kruse, Giuseppe Vitagliano, Iagoba Apellaniz, Matthias Kleinmann, Geza Toth, Carsten Klempt.
Entanglement between two spatially separated atomic modes
Science (2018)
DOI: 10.1126/science.aao2035

Media Contact

Matxalen Sotillo
komunikazioa@ehu.eus
34-688-673-770

 @upvehu

http://www.ehu.es 

Matxalen Sotillo | EurekAlert!
Further information:
https://www.ehu.eus/en/-/sciencek-korapilatze-kuantikoari-buruzko-lan-bat-argitaratu-du-upv-ehu-partaide-izan-duena
http://dx.doi.org/10.1126/science.aao2035

More articles from Physics and Astronomy:

nachricht APEX takes a glimpse into the heart of darkness
25.05.2018 | Max-Planck-Institut für Radioastronomie

nachricht First chip-scale broadband optical system that can sense molecules in the mid-IR
24.05.2018 | Columbia University School of Engineering and Applied Science

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: Powerful IT security for the car of the future – research alliance develops new approaches

The more electronics steer, accelerate and brake cars, the more important it is to protect them against cyber-attacks. That is why 15 partners from industry and academia will work together over the next three years on new approaches to IT security in self-driving cars. The joint project goes by the name Security For Connected, Autonomous Cars (SecForCARs) and has funding of €7.2 million from the German Federal Ministry of Education and Research. Infineon is leading the project.

Vehicles already offer diverse communication interfaces and more and more automated functions, such as distance and lane-keeping assist systems. At the same...

Im Focus: Molecular switch will facilitate the development of pioneering electro-optical devices

A research team led by physicists at the Technical University of Munich (TUM) has developed molecular nanoswitches that can be toggled between two structurally different states using an applied voltage. They can serve as the basis for a pioneering class of devices that could replace silicon-based components with organic molecules.

The development of new electronic technologies drives the incessant reduction of functional component sizes. In the context of an international collaborative...

Im Focus: LZH showcases laser material processing of tomorrow at the LASYS 2018

At the LASYS 2018, from June 5th to 7th, the Laser Zentrum Hannover e.V. (LZH) will be showcasing processes for the laser material processing of tomorrow in hall 4 at stand 4E75. With blown bomb shells the LZH will present first results of a research project on civil security.

At this year's LASYS, the LZH will exhibit light-based processes such as cutting, welding, ablation and structuring as well as additive manufacturing for...

Im Focus: Self-illuminating pixels for a new display generation

There are videos on the internet that can make one marvel at technology. For example, a smartphone is casually bent around the arm or a thin-film display is rolled in all directions and with almost every diameter. From the user's point of view, this looks fantastic. From a professional point of view, however, the question arises: Is that already possible?

At Display Week 2018, scientists from the Fraunhofer Institute for Applied Polymer Research IAP will be demonstrating today’s technological possibilities and...

Im Focus: Explanation for puzzling quantum oscillations has been found

So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics

Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

In focus: Climate adapted plants

25.05.2018 | Event News

Save the date: Forum European Neuroscience – 07-11 July 2018 in Berlin, Germany

02.05.2018 | Event News

Invitation to the upcoming "Current Topics in Bioinformatics: Big Data in Genomics and Medicine"

13.04.2018 | Event News

 
Latest News

In focus: Climate adapted plants

25.05.2018 | Event News

Flow probes from the 3D printer

25.05.2018 | Machine Engineering

Less is more? Gene switch for healthy aging found

25.05.2018 | Life Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>