(Press-News.org) A quantum machine can drastically speed up certain kinds of computation, but only if two or more quantum bits in the machine are entangled---that is, capable of displaying related behavior despite being separated. Seeking a way for users of cloud-based quantum computing services to detect qubit entanglement, Jiheon Seong and Joonwoo Bae of the Korea Advanced Institute of science and Technology developed and tested an entanglement witness circuit. It works to certify entanglement even when the cloud-based service allows only limited control of the machine. Their research was published Sep. 21 in Intelligent Computing, a Science Partner Journal.
Researchers want to build circuits that generate entanglement among qubits. However, until they use a circuit, they do not know whether it is an entanglement-generating circuit or not. A costly procedure called quantum tomography can be performed, or the researcher can use an entanglement witness. The entanglement witness is a mathematical function relating two specific qubits and their states. The value of its output signals whether the states of the qubits are entangled or separable.
Unfortunately, it is not always possible to use an entanglement witness without direct access to the quantum machine. In a lab setting, and in the IBMQ cloud-based quantum computing service, a researcher can choose which of the machine’s hardware qubits to allocate to a circuit. In the IonQ cloud-based quantum computing service, the user does not have this level of control, and thus cannot be sure of getting the appropriate values for computing the output of the entanglement witness function.
A researcher’s only input to the IBMQ and IonQ cloud services is a quantum circuit. To address this limitation, Seong and Bae designed special entanglement witness circuits that use the entanglement witness strategy for certifying the presence of entangled qubits. Researchers can use these circuits to detect entanglement using only the measurement statistics output by the service. They do not need to be able to control qubit allocation. Entanglement witness circuits enable researchers using cloud-based computing to satisfy an “essential requirement” in the process of seeking quantum advantages.
Moreover, the new entanglement witness circuits are built on a recently developed framework called EW 2.0, which is twice as efficient at detecting entanglement.
Seong and Bae describe entanglement detection for two- and three-qubit entanglement-generating circuits, outline two schemes for constructing entanglement witness circuits for entanglement-generating circuits and share results of experiments using the IBMQ and IonQ cloud-based quantum computing services.
END
Can cloud-based quantum computing really offer a quantum advantage?
Entanglement witness circuit lets users test for entangled qubits
2023-09-22
[Attachments] See images for this press release:
ELSE PRESS RELEASES FROM THIS DATE:
UNC-Chapel Hill research presents new development model for the world's third-longest river
2023-09-22
A new research paper published in Science Advances reveals how changes in the size of the Yangtze River watershed may have led to the carving of deep canyons.
In this study, UNC-Chapel Hill professor Eric Kirby and his co-authors explore the impact of drainage basin expansion on the growth of the Yangtze River.
“This study presents a new model for when and how the Yangtze River was born,” said Kirby, “The Yangtze is one of the world’s great rivers, rising on the Tibetan Plateau at altitudes over 17,000 feet and descending ...
Why are you better at recognizing upright faces? Clues from a person who sees the world differently
2023-09-22
When you see a familiar face upright, you’ll recognize it right away. But if you saw that same face upside down, it’s much harder to place. Now researchers who’ve studied Claudio, a 42-year-old man whose head is rotated back almost 180 degrees such that it sits between his shoulder blades, suggest that the reason people are so good at processing upright faces has arisen through a combination of evolution and experience. The findings appear September 22 in the journal iScience.
“Nearly everyone has far more experience with upright faces and ancestors whose reproduction ...
Jellyfish shown to learn from past experience for the first time
2023-09-22
Even without a central brain, jellyfish can learn from past experiences like humans, mice, and flies, scientists report for the first time on September 22 in the journal Current Biology. They trained Caribbean box jellyfish (Tripedalia cystophora) to learn to spot and dodge obstacles. The study challenges previous notions that advanced learning requires a centralized brain and sheds light on the evolutionary roots of learning and memory.
No bigger than a fingernail, these seemingly simple jellies have a complex visual system with 24 eyes embedded in their bell-like body. Living ...
Jellyfish are smarter than you think
2023-09-22
Jellyfish are more advanced than once thought. A new study from the University of Copenhagen has demonstrated that Caribbean box jellyfish can learn at a much more complex level than ever imagined – despite only having one thousand nerve cells and no centralized brain. The finding changes our fundamental understanding of the brain and could enlighten us about our own mysterious brains.
After more than 500 million years on Earth, the immense evolutionary success of jellyfish is undeniable. Still, we've always thought of them as simple creatures with very limited learning abilities.
The prevailing opinion is that ...
Vulnerability of older adults to government impersonation scams
2023-09-22
About The Study: In this study using a behavioral experiment designed to mimic a real-world imposter scam among 644 older adults, a sizable number of older adults engaged without skepticism. The results suggest that many older adults, including those without cognitive impairment, are vulnerable to fraud and scams.
Authors: Lei Yu, Ph.D., of Rush University Medical Center in Chicago, is the corresponding author.
To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/
(doi:10.1001/jamanetworkopen.2023.35319)
Editor’s ...
Cardiovascular disease burden, outcomes among American Indian and Alaska native Medicare beneficiaries
2023-09-22
About The Study: The results of this study of 220,000 American Indian and Alaska Native patients with Medicare insurance suggest a significant burden of cardiovascular disease and cardiometabolic risk factors. These findings highlight the critical need for future efforts to prioritize the cardiovascular health of this population.
Authors: Lauren A. Eberly, M.D., M.P.H., of the Indian Health Service in Gallup, New Mexico, is the corresponding author.
To access the embargoed study: Visit ...
Rapid and visual detection of monkey B virus based on recombinase polymerase amplification
2023-09-22
https://www.scienceopen.com/hosted-document?doi=10.15212/ZOONOSES-2023-0031
Announcing a new article publication for Zoonoses journal. Monkey B virus (BV) infection in humans and other macaque species has a mortality rate of approximately 80%. Because BV infects humans through bites, scratches, and other injuries inflicted by macaques, the simple and rapid diagnosis of BV in field laboratories is of great importance to protect veterinarians, laboratory researchers, and support personnels from the threat of infection.
Two recombinase polymerase amplification (RPA) assays with a closed vertical flow (VF) visualization strip (RPA-VF-UL27 and RPA-VF-US6) were developed that target ...
A promising drug candidate for ALS – prolongs lifespan and eases symptoms in rats and mice
2023-09-22
A research group at the University of Helsinki and its partners have found a promising drug candidate for the treatment of amyotrophic lateral sclerosis (ALS). Cerebral dopamine neurotrophic factor CDNF prolongs the lifespan of and alleviates disease symptoms in rats and mice in animal studies.
Amyotrophic lateral sclerosis (ALS) is a rapidly progressing fatal neurodegenerative disease that affects the nerve cells in the brain and spinal cord. Specifically, a selective degeneration of motoneurons occurs in the spinal cord, leading to muscle atrophy and paralysis. Most patients with ...
Same genes behind heart muscle disorders in humans and Dobermanns
2023-09-22
Researchers have made a significant finding in determining the genetic background of dilated cardiomyopathy in Dobermanns. This research helps us understand the genetic risk factors related to fatal diseases of the heart muscle and the mechanisms underlying the disease, and offers new tools for their prevention.
Researchers from the University of Helsinki and the Folkhälsan Research Center, together with their international partners, have identified the genetic background of dilated cardiomyopathy, a disease that enlarges the heart muscle, in dogs and humans.
Based ...
A teamwork to evaluate the influence of the cathode catalyst layer platinum loading on the durability of PEMFC
2023-09-22
Proton exchange membrane fuel cells (PEMFCs) hold promise as a replacement for fossil fueled engines in heavy-duty vehicles. Reducing the platinum content in catalysts is pivotal for scaling up in such applications. Yet, the degradation patterns of low platinum content catalysts remain poorly understood. A team of scientists conducted experiments to shed light on the degradation mechanisms associated with varying catalyst content, offering valuable insights. Their work is published in the journal Industrial Chemistry & Materials on 11 Aug 2023.
In ...
LAST 30 PRESS RELEASES:
Mysteries of the bizarre ‘pseudogap’ in quantum physics finally untangled
Study: Proteins in tooth enamel offer window into human wellness
New cancer cachexia treatment boosts weight gain and patient activity
Rensselaer researcher receives $3 million grant to explore gut health
Elam named as a Fellow of the Electrochemical Society
Study reveals gaps in access to long-term contraceptive supplies
Shining a light on the roots of plant “intelligence”
Scientists identify a unique combination of bacterial strains that could treat antibiotic-resistant gut infections
Pushing kidney-stone fragments reduces stones’ recurrence
Sweet success: genomic insights into the wax apple's flavor and fertility
New study charts how Earth’s global temperature has drastically changed over the past 485 million years, driven by carbon dioxide
Scientists say we have enough evidence to agree global action on microplastics
485 million-year temperature record of Earth reveals Phanerozoic climate variability
Atmospheric blocking slows ocean-driven glacier melt in Greenland
Study: Over nearly half a billion years, Earth’s global temperature has changed drastically, driven by carbon dioxide
Clinical trial could move the needle in traumatic brain injury
AI model can reveal the structures of crystalline materials
MD Anderson Research Highlights for September 19, 2024
The role of artificial intelligence in advancing intratumoral immunotherapy
Political ideology is associated with differences in brain structure, but less than previously thought
Genetic tracing at the Huanan Seafood market further supports COVID animal origins
Breastfeeding is crucial to shaping infant’s microbes and promoting lung health
Scientists at the CNIC discover an unexpected involvement of sodium transport in mitochondrial energy generation
Origami paper sensors could help early detection of infectious diseases in new simple, low-cost test
Safety of the seasonal influenza vaccine in 2 successive pregnancies
Preconception and early-pregnancy BMI in women and men, time to pregnancy, and risk of miscarriage
Samples from Huanan Seafood Market provide further evidence of COVID-19 animal origins
City of Hope vaccine experts report positive results on Phase 1 trial of personalized vaccine for lymphoplasmacytic lymphoma
Global assessment: How to make climate adaptation a success
The African Engineering and Technology Network signs eighth university partner
[Press-News.org] Can cloud-based quantum computing really offer a quantum advantage?Entanglement witness circuit lets users test for entangled qubits