Navigation Links
Unleashing the power of quantum dot triplets
Date:7/24/2014

Quantum computers have yet to materialise. Yet, scientists are making progress in devising suitable means of making such computers faster. One such approach relies on quantum dotsa kind of artificial atom, easily controlled by applying an electric field. A new study demonstrates that changing the coupling of three coherently coupled quantum dots (TQDs) with electrical impulses can help better control them. This has implications, for example, should TQDs be used as quantum information units, which would produce faster quantum computers due to the fact that they would be operated through electrical impulses. These findings have been published in EPJ B by Sahib Babaee Tooski and colleagues affiliated with both the Institute of Molecular Physics at the Polish Academy of Sciences, in Poznan, Poland, the University of Ljubljana and the Joef Stefan Institute in Slovenia.

The authors study the interplay between internal electronswhich, due to electron spins, are localised on the different quantum dots. They then compare them with the interactions of the conducting electrons, which, at low temperature, can increase the electrical resistance, due to what is referred to as the Kondo effect. This effect can be induced by coupling one of the quantum dots with the electrodes.

Tooski and colleagues thus demonstrate that by changing the coupling of the quantum dot with the electrodes, they can help induce the quantum phase transition between entangled and disentangled electron states. Such variations are typically detectable through a sudden jump in the entropy and the spin susceptibility. However, theoretical investigations outlined in the paper and based on numerical renormalisation group analysis suggest that the detection of such change is best achieved by measuring the electrical conductance. This is because, as the authors show, the conductance should be different for the entangled and disentangled states.


'/>"/>
Contact: Laura Zimmermann
laura.zimmermann@springer.com
49-622-148-78414
Springer
Source:Eurekalert  

Page: 1

Related biology technology :

1. AACC Enhances Attendee Experience at Its 2014 Annual Meeting & Clinical Lab Expo with a2z-Powered ChirpE Photo Booth and Mobile App
2. Comb on a chip powers new NIST/Caltech atomic clock design
3. Emerging Nuclear Power Countries - Market Forecast, Key Companies and Development Analysis, Size, Share, Growth, Trend to 2030
4. Rice nanophotonics experts create powerful molecular sensor
5. EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System
6. Columbia Engineering wins $3 million ARPA-E grant to raise efficiency, lower cost of power grid
7. RAMBO a small but powerful magnet
8. Accelerated Cure Project for Multiple Sclerosis Approved for Major Funding Award from Patient-Centered Outcomes Research Institute to Create MS Patient-Powered Research Network
9. Low-power tunneling transistor for high-performance devices at low voltage
10. AV Concepts Adds Industry Powerhouse Gerry Small to Executive Team As Chief Operating Officer
11. Discovering the Power of Capsules and Liquid Filling Technology, New Life Science Webinar Hosted by Xtalks
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Unleashing the power of quantum dot triplets
(Date:10/11/2017)... , ... October 11, 2017 , ... Disappearing forests and ... lives of over 5.5 million people each year. Especially those living in larger cities ... Treepex - based in one of the most pollution-affected countries globally - decided to ...
(Date:10/11/2017)... ... October 11, 2017 , ... Singh Biotechnology today ... designation to SBT-100, its novel anti-STAT3 (Signal Transducer and Activator of Transcription 3) ... able to cross the cell membrane and bind intracellular STAT3 and inhibit its ...
(Date:10/10/2017)... Angeles, CA (PRWEB) , ... ... ... Inc., a development-stage cancer-focused pharmaceutical company advancing targeted antibody-drug conjugate (ADC) therapeutics, ... uses of targeted HPLN (Hybrid Polymerized Liposomal Nanoparticle), a technology developed in ...
(Date:10/10/2017)... , ... October 10, 2017 , ... Dr. Bob Harman, ... his local San Diego Rotary Club. The event entitled “Stem Cells ... and had 300+ attendees. Dr. Harman, DVM, MPVM was joined by two human ...
Breaking Biology Technology:
(Date:4/6/2017)... April 6, 2017 Forecasts by ... Document Readers, by End-Use (Transportation & Logistics, Government & ... Gas & Fossil Generation Facility, Nuclear Power), Industrial, Retail, ... Are you looking for a definitive report ... ...
(Date:4/5/2017)... LONDON , April 4, 2017 KEY ... is anticipated to expand at a CAGR of 25.76% ... neurodegenerative diseases is the primary factor for the growth ... full report: https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The ... of product, technology, application, and geography. The stem cell ...
(Date:3/30/2017)... ANGELES , March 30, 2017  On April ... Hack the Genome hackathon at Microsoft,s ... exciting two-day competition will focus on developing health and ... Hack the Genome is the ... been tremendous. The world,s largest companies in the genomics, ...
Breaking Biology News(10 mins):