In a study published in Physical Review Letters, a team led by academician Guo Guangcan from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) has made progress in high dimensional quantum teleportation. The researchers demonstrated the teleportation of high-dimensional states in a three-dimensional six-photon system.
To transmit unknown quantum states from one location to another, quantum teleportation is one of the key technologies to realize long-distance transmission.
Compared with two-dimensional systems, high-dimensional system quantum networks have the advantages of higher channel capacity and better security. In recent years more and more researchers of the quantum information field have been working on generating efficient generation of high-dimensional quantum teleportation to achieve efficient high-dimensional quantum networks.
As early as 2016, the researchers from USTC experimentally showed that nonlocality can be produced from single-particle contextuality through two-particle correlations which do not violate any Bell inequality by themselves, and generated high-fidelity three-dimensional entanglement. In 2020, 32-dimensional quantum entanglement and efficient distribution of high-dimensional entanglement through 11 km fiber were respectively achieved to lay a solid foundation for scalable quantum networks.
In a linear optical system, auxiliary entanglement is the key to realizing high-dimensional quantum teleportation. The researchers exploited the spatial mode (path) to encode the three-dimensional states that has been demonstrated to extremely high-fidelity, and used an auxiliary entangled photon pair to perform the high-dimensional Bell state measurement (HDBSM), demonstrating the teleportation of a three-dimensional quantum state using the spatial mode of a single photon.
In this work, the fidelity of teleportation process matrix could reach 0.5967, which is seven standard deviations above the fidelity of 1/3, which proves the teleportation is both non-classical and genuinely three dimensional.
This study paves the way to rebuild complex quantum systems remotely and to construct complex quantum networks. It will promote the research on high-dimensional quantum information tasks. Entanglement-assisted methods for HDBSM are feasible for other high-dimensional quantum information tasks.
Seeing our world through the eyes of a migratory bird would be a rather spooky experience. Something about their visual system allows them to ‘see’ our planet’s magnetic field, a clever trick of quantum physics, and biochemistry that helps them navigate vast distances.
Now, for the first time ever, scientists from the University of Tokyo have directly observed a key reaction hypothesised to be behind birds’, and many other creatures’, talents for sensing the direction of the planet’s poles.
Importantly, this is evidence of quantum physics directly affecting a biochemical reaction in a cell – something we’ve long hypothesised but haven’t seen in action before.
Using a tailor-made microscope sensitive to faint flashes of light, the team watched a culture of human cells containing a special light-sensitive material respond dynamically to changes in a magnetic field.
The change the researchers observed in the lab match just what would be expected if a quirky quantum effect was responsible for the illuminating reaction.
“We’ve not modified or added anything to these cells,” says biophysicist Jonathan Woodward.
“We think we have extremely strong evidence that we’ve observed a purely quantum mechanical process affecting chemical activity at the cellular level.”
So how are cells, particularly human cells, capable of responding to magnetic fields?
While there are several hypotheses out there, many researchers think the ability is due to a unique quantum reaction involving photoreceptors called cryptochromes.
Cyrptochromes are found in the cells of many species and are involved in regulating circadian rhythms. In species of migratory birds, dogs, and other species, they’re linked to the mysterious ability to sense magnetic fields.
In fact, while most of us can’t see magnetic fields, our own cells definitely contain cryptochromes. And there’s evidence that even though it’s not conscious, humans are actually still capable of detecting Earth’s magnetism.
To see the reaction within cyrptochromes in action, the researchers bathed a culture of human cells containing cryptochromes in blue light caused them to fluoresce weakly. As they glowed, the team swept magnetic fields of various frequencies repeatedly over the cells.
They found that each time the magnetic field passed over the cells, their fluorescence dipped around 3.5 percent – enough to show a direct reaction.
So how can a magnetic field affect a photoreceptor?
It all comes down to something called spin – an innate property of electrons.
We already know that spin is significantly affected by magnetic fields. Arrange electrons in the right way around an atom, and collect enough of them together in one place, and the resulting mass of material can be made to move using nothing more than a weak magnetic field like the one that surrounds our planet.
This is all well and good if you want to make a needle for a navigational compass. But with no obvious signs of magnetically-sensitive chunks of material inside pigeon skulls, physicists have had to think smaller.
In 1975, a Max Planck Institute researcher named Klaus Schulten developed a theory on how magnetic fields could influence chemical reactions.
It involved something called a radical pair.
A garden-variety radical is an electron in the outer shell of an atom that isn’t partnered with a second electron.
Sometimes these bachelor electrons can adopt a wingman in another atom to form a radical pair. The two stay unpaired but thanks to a shared history are considered entangled, which in quantum terms means their spins will eerily correspond no matter how far apart they are.
Since this correlation can’t be explained by ongoing physical connections, it’s purely a quantum activity, something even Albert Einstein considered ‘spooky‘.
In the hustle-bustle of a living cell, their entanglement will be fleeting. But even these briefly correlating spins should last just long enough to make a subtle difference in the way their respective parent atoms behave.
In this experiment, as the magnetic field passed over the cells, the corresponding dip in fluorescence suggests that the generation of radical pairs had been affected.
An interesting consequence of the research could be in how even weak magnetic fields could indirectly affect other biological processes. While evidence of magnetism affecting human health is weak, similar experiments as this could prove to be another avenue for investigation.
“The joyous thing about this research is to see that the relationship between the spins of two individual electrons can have a major effect on biology,” saysWoodward.
Of course, birds aren’t the only animal to rely on our magnetosphere for direction. Species of fish, worms, insects, and even some mammals have a knack for it. We humans might even be cognitively affected by Earth’s faint magnetic field.
Having evidence that at least one of them connects the weirdness of the quantum world with the behaviour of a living thing is enough to force us to wonder what other bits of biology arise from the spooky depths of fundamental physics.
Then I came close to him and kissed his hand, and said to him: ‘There remains one thing I need.’ He said: ‘Ask.’ I said: ‘I desire realisation (tahaqquq) in the manner of your witnessing of the self-revelation of the Essence continually and eternally.’ I meant by that the attainment of that which came upon him from the essential self-disclosure, beyond which there is no veil and without which there is no establishment for perfection . He said: ‘Yes …Ibn el Arabi.
A 2011 study by psychologist Dr. Daryl Bem seemed to prove that ESP and other psychic phenomena may be real.The study caused tremendous controversy and catalyzed a re-examination of psychology research methods.Bem’s paper had many critics but its results were replicated in some later studies.
5-year-olds recognize social hierarchies and are aware when others don’t contribute their fair share.
Children of this age consider someone a leader only when they sacrifice toward achieving the common goal.
“Leaders” who take more than they give are considered unacceptable to young children.
To some, attaining leadership is like winning the ultimate prize, while for others it represents an opportunity to help. A new study in Child Development finds that young children have a very clear opinion about what makes a leader, and it has nothing to do with arriving at a position of privilege. It turns out 5-year-olds understand the attributes that make someone worthy of being a leader better than lots of adults do, including some powerful people.
Waking to the sound of monks chanting prayers and drumming their gongs during countless traditional pujas, a ceremony of honour, worship and devotion; running up the steep Himalayan mountain slopes under colourful prayer flags hung between trees in the lush natural landscape; looking out at the expanse of forests and mountains that surrounded its capital city, Thimphu.
These are the memories that remain imprinted in my memory after two years living in Bhutan – the Himalayan Kingdom best known for its concept of “Gross National Happiness” (GNH). But, what is GNH and are the people of Bhutan really the happiest in the world?
A Chinese investigation has revealed SARS-CoV-2 is present on many imported food products and packaging
SARS-CoV-2 has been detected on shrimp from Saudi Arabia, fish from India, beef and chicken from Brazil, pork from Germany, salmon from Norway and shrimp from Ecuador
According to the International Commission for Microbiological Specifications of Foods, SARS-CoV-2-contaminated food is unlikely to pose a health risk
SARS-CoV-2 has also been found on particles of air pollution. Scientists are investigating to determine whether the virus might be able to spread over long distances this way
Considering we cannot hide from the virus, the least destructive path forward would be to implement the advice given by the authors of the Great Barrington Declaration, which calls for “focused protection” to encourage the development of herd immunity
According to a November 16, 2020, report by Food Safety News,1 a Chinese investigation has revealed SARS-CoV-2 is present on many imported food products and packaging, and it’s far from a solitary incidence.
“Ele ainda está vivo”! Disse o policial ao encontrá-lo dentro do carro completamente destruído.
Embora vários anos tenham se passado, Christian Busch se lembra claramente dessas palavras. E aquele acidente mudaria sua vida.
Busch é professor da Universidade de Nova York, nos Estados Unidos, e da London School of Economics (LSE), no Reino Unido. Como pesquisador, ele se especializou em empreendedorismo e liderança de impacto social, inovação de modelos de negócios e mercados emergentes. Foi incluído nas listas “Top 99 Influencers” da revista Diplomatic Courier; “Ideas People”, da revista britânica The Economist; e “Davos 50”, do Fórum Econômico Mundial.
Recentemente, publicou o livro The Serendipity Mindset: The Art & Science of Creating Good Luck (“Mentalidade da serendipidade: a arte e a ciência de criar boa sorte”, em tradução livre), em que analisa a importância de dar sentido ao inesperado para encontrar oportunidades, não só profissionalmente, mas também a nível pessoal.
“Muita gente se mostra cética quanto à capacidade de tirar proveito do acaso. Mas quando olham os dados, fica claro como a luz do dia: o inesperado está sempre acontecendo, então faz sentido tentar estar pronto para ele. Hoje em dia, não é raro as empresas criarem cargos com títulos como serendipity spotter (algo como “identificador de serendipidade”) “, diz ele à BBC News Mundo, serviço em espanhol da BBC.
Everybody loves a good secret. In fact, the juicier, the better. Why? Because we all love being insiders. We love the feeling of exclusivity, of knowing something that’s just ours and no one else’s.
But in business, secrets do more than just stroke our egos. We love having the upper hand. We love having the “unfair advantage,” to borrow entrepreneur Jason Cohen’s term.
So when someone like Dr. Ivan Misner, founder and chairman of BNI, the world’s largest business networking organization boasting 5.4 million referrals and more than $6.5 billion in resulting revenue, asks, “Do you want to know the secret to success?” you listen. What’s “the secret”? Well, there isn’t just one. But think about this: “Success is the uncommon application of common knowledge.” In other words, when it comes to success, what matters isn’t so much learning something new but putting into practice what we already know. Here are four not-so-secret secrets of insanely successful people:
Mansur al-Hallaj about the Lowest Stage of Tasawwuf:
He was questioned about Tasawwuf while he was hanged onto the gibbet, so he said to the questioner; “The lowest degree of Tasawwuf is which you are witnessing now.” [He meant to say (and Allah knows better), the lowest level of Tasawwuf is to happily accept the fate decreed by the Almighty and endearingly welcome them as I am doing it despite the extent of extremity in which I am being presecuted, but I am pleased and I still have the same passion (for the Divine) and eruption of love which I had during my peaceful and pleasant times].
_If you give life that would be your grace and if you take [my] life I will go ransomed for you;
_The heart has been attached to you, so whatever you do, it is all your choice.
_ [Taken from: _Mansur Al-Hallaj: A Life History,_ under the section of: Malfudhat (Quotes) of Ibn Mansur, p. 35].