Mathematical breakthrough sets out rules for more effective teleportation

New protocol advances solutions for more efficient teleportation - the transport of quantum information at the speed of light

2013-01-16

(Press-News.org) For the last ten years, theoretical physicists have shown that the intense connections generated between particles as established in the quantum law of 'entanglement' may hold the key to eventual teleportation of quantum information.

Now, for the first time, researchers have worked out how entanglement could be 'recycled' to increase the efficiency of these connections. Published in the journal Physical Review Letters, the result could conceivably take us a step closer to sci-fi style teleportation in the future, although this research is purely theoretical in nature.

The team have also devised a generalised form of teleportation, which allows for a wide variety of potential applications in quantum physics.

Once considered impossible, in 1993 a team of scientists calculated that teleportation could work in principle using quantum laws. Quantum teleportation harnesses the 'entanglement' law to transmit particle-sized bites of information across potentially vast distances in an instant.

Entanglement involves a pair of quantum particles such as electrons or protons that are intrinsically bound together, retaining synchronisation between the two that holds whether the particles are next to each other or on opposing sides of a galaxy. Through this connection, quantum bits of information - qubits - can be relayed using only traditional forms of classical communication.

Previous teleportation protocols, have fallen into one of two camps, those that could only send scrambled information requiring correction by the receiver, or more recently, "port-based" teleportation that doesn't require a correction, but needed an impractical amount of entanglement – each object sent would destroy the entangled state.

Now, physicists from Cambridge, University College London, and the University of Gdansk have developed a protocol to provide an optimal solution in which the entangled state is 'recycled', so that the gateway between particles holds for the teleportation of multiple objects.

They have even devised a protocol in which multiple qubits can be teleported simultaneously, although the entangled state degrades proportionally to the amount of qubits sent in both cases.

"The first protocol consists of sequentially teleporting states, and the second teleports them in a bulk," said Sergii Strelchuck from Cambridge's Department of Applied Mathematics and Theoretical Physics, who led the research with colleagues Jonathan Oppenheim of Cambridge and UCL and Michal Horodecki of the University of Gdansk.

"We have also found a generalised teleportation technique which we hope will find applications in areas such as quantum computation."

Einstein famously loathed the theory of quantum entanglement, dismissing it as "spooky action at a distance". But entanglement has since been proven to be a very real feature of our universe, and one that has extraordinary potential to advance all manner of scientific endeavor.

"There is a close connection between teleportation and quantum computers, which are devices which exploit quantum mechanics to perform computations which would not be feasible on a classical computer," said Strelchuck.

"Building a quantum computer is one of the great challenges of modern physics, and it is hoped that the new teleportation protocol will lead to advances in this area."

While the Cambridge physicists' protocol is completely theoretical, last year a team of Chinese scientists reported teleporting photons over 143km, breaking previous records, and quantum entanglement is increasingly seen as an important area of scientific investment. Teleportation of information carried by single atoms is feasible with current technologies, but the teleportation of large objects - such as Captain Kirk - remains in the realm of science fiction.

Adds Strelchuck: "Entanglement can be thought of as the fuel, which powers teleportation. Our protocol is more fuel efficient, able to use entanglement thriftily while eliminating the need for error correction."

###The paper Generalized teleportation and entanglement recycling can be viewed here: http://arxiv.org/abs/1209.2683

Author Contacts: Sergii Strelchuk at the University of Cambridge: +44 (0)7575461510 or +44 (0)1223760367 ss870@cam.ac.uk Michal Horodecki at the University of Gdansk: fizmh@ug.edu.pl Jonathan Oppenheim at University College London and Royal Society University Research Fellow: j.oppenheim@ucl.ac.uk

ELSE PRESS RELEASES FROM THIS DATE:

New surfaces repel most known liquids

2013-01-16

In an advance toward stain-proof, spill-proof clothing, protective garments and other products that shrug off virtually every liquid — from blood and ketchup to concentrated acids — scientists are reporting development of new "superomniphobic" surfaces. Their report on surfaces that display extreme repellency to two families of liquids — Newtonian and non-Newtonian liquids — appears in the Journal of the American Chemical Society. Anish Tuteja and colleagues point out that scientists have previously reported "omniphobic" surfaces, the term meaning that such surfaces can ...

Growing up bilingual

2013-01-16

This press release is available in French. Montreal, January 16, 2013 – Language mixing – using elements from two languages in the same sentence – is frequent among bilingual parents and could pose a challenge for vocabulary acquisition by one- and two-year-old children, according to a new study by Concordia University psychology professor Krista Byers-Heinlein. Those results are likely temporary, however, and are often counterbalanced by cognitive advantages afforded to children raised in a bilingual environment. With immigration and international mobility on the ...

Privacy a problem for mothers of newborns in neonatal intensive care units, CWRU study finds

2013-01-16

Many mothers of newborns in neonatal intensive care units have difficulty finding private, quiet places in the hospital to express milk, according to a new study from the Frances Payne Bolton School of Nursing at Case Western Reserve University. The lack of privacy—if it causes mothers to miss feedings or makes them too timid to express milk—is an even greater health risk for low-weight premature newborns, because milk enriched with the mother's antibodies helps ward off infection and gastrointestinal problems. "The meaning of privacy might differ for mothers and the ...

PR professionals are not 'yes men' when pressured to be unethical, Baylor study finds

2013-01-16

Public relations professionals who have provided ethics counsel to senior management are at least as fervent about serving the public interest — sometimes even more so — as they are about their duty to their organizations, according to a Baylor University researcher. A new study of 30 senior public relations professionals, most of whom had served as an "organizational conscience," showed the individuals viewed themselves as an "independent voice" in the organization and not "mired by its perspective or politics," said study author Marlene S. Neill, Ph.D., a lecturer in ...

Institute of Medicine report details for monitoring safety of childhood immunization schedule

2013-01-16

ANN ARBOR -- A review of the available evidence underscores the safety of the federal childhood immunization schedule, according to a report released today by the Institute of Medicine. University of Michigan population ecologist Pejman Rohani served on the 13-person committee that wrote the report. Roughly 90 percent of American children receive most childhood vaccines advised by the federal immunization schedule by the time they enter kindergarten, the committee noted. However, some parents choose to spread out their children's immunizations over a different time frame ...

IOM report details strategy for monitoring safety of childhood immunization schedule

2013-01-16

WASHINGTON -- A review of the available evidence underscores the safety of the federal childhood immunization schedule, says a new report from the Institute of Medicine. Should signals indicate the need for investigation of the schedule, however, the report offers a framework for conducting safety research using existing or new data collection systems. Roughly 90 percent of American children receive most childhood vaccines advised by the federal immunization schedule by the time they enter kindergarten, noted the committee that wrote the report. However, some parents ...

Robot allows 'remote presence' in programming brain and spine stimulators

2013-01-16

Philadelphia, Pa. (January 16, 2013) – With the rapidly expanding use of brain and spinal cord stimulation therapy (neuromodulation), new "remote presence" technologies may help to meet the demand for experts to perform stimulator programming, reports a study in the January issue of Neurosurgery, official journal of the Congress of Neurological Surgeons. The journal is published by Lippincott Williams & Wilkins, a part of Wolters Kluwer Health. The preliminary study by Dr. Ivar Mendez of Queen Elizabeth II Health Sciences Centre in Halifax, Nova Scotia, Canada, supports ...

Breast Cancer Message Board study finds frequent discussion of drug side effects, stopping therapy

2013-01-16

PHILADELPHIA -- In the first study to examine discussion of drug side effects on Internet message boards, researchers from the Perelman School of Medicine at the University of Pennsylvania found that breast cancer survivors taking the commonly prescribed adjuvant therapy known as aromatase inhibitors (AIs) often detailed in these forums troublesome symptoms resulting from the drugs, and they were apt to report discontinuing the treatment or switching to a different drug in the same class. The findings are published online this week in the journal Pharmacoepidemiology and ...

Sustainable reinforcement for concrete has newly discovered benefits

2013-01-16

Fashionable people may turn up their noses at jute — the cheap fiber used to make burlap, gunny sacks, twine and other common products — but new research is enhancing jute's appeal as an inexpensive, sustainable reinforcement for mortar and concrete. The study appears in ACS' journal Industrial & Engineering Chemistry Research. Subhasish B Majumder and colleagues note that there has been a resurgence of interest in using economical, sustainable natural fibers, rather than steel or synthetic fibers, to reinforce the cement compositions used to make concrete and mortar, ...

Development of the first way to make large amounts of promising anti-cancer substance

2013-01-16

Scientists are reporting development of the first practical way to make large amounts of a promising new anti-cancer substance that kills cancer cells differently than existing medicines. Their article on synthesis of the substance, and tests demonstrating its effectiveness in the laboratory, appears in ACS' Journal of Medicinal Chemistry. Isamu Shiina and colleagues explain that the substance, AMF-26, showed promise against certain forms of cancer in laboratory studies, fostering excitement about its potential for development as a new anti-cancer drug. That excitement ...

LAST 30 PRESS RELEASES:

AI model offers accurate and explainable insights to support autism assessment

Process for dealing with sexual misconduct by doctors requires major reform

Severe pregnancy sickness raises risk of mental health conditions by over 50%

Early humans may have walked from Türkiye to mainland Europe, new groundbreaking research suggests

New study shows biochar’s electrical properties can influence rice field methane emissions

Guangdong faces largest chikungunya outbreak on record

Tirzepatide improves blood sugar control in children aged 10-17 years with type 2 diabetes inadequately controlled on existing therapies (SURPASS-PEDS trial)