Archive for the ‘quantum physics’ category: Page 573
Mar 12, 2019
Quantum physicists succeed in controlling energy losses and shifts
Posted by Quinn Sena in categories: computing, quantum physics
Quantum computers need to preserve quantum information for a long time to be able to crack important problems faster than a normal computer. Energy losses take the state of the qubit from one to zero, destroying stored quantum information at the same time. Consequently, scientists all over the globe have traditionally worked to remove all sources of energy loss—or dissipation—from these machines.
Dr. Mikko Mottonen from Aalto University and his research team have taken a different approach. “Years ago, we realized that quantum computers actually need dissipation to operate efficiently. The trick is to have it only when you need it,” he explains.
Continue reading “Quantum physicists succeed in controlling energy losses and shifts” »
Mar 12, 2019
China to develop a quantum satellite to provide 24h-service
Posted by Klaus Baldauf in categories: quantum physics, satellites
China plans to develop a medium-high-earth-orbit quantum communication satellite able to provide services around the clock in the next few years, Pan Jianwei, member of the 13th National Committee of the Chinese People’s Political Consultative Conference (CPPCC), told CGTN at the press conference for the second session of the 13th CPPCC National Committee on Sunday.
When asked about the future plan for quantum communication technology, Pan said his team is planning to design a new one to supplement the Mozi satellite, which can only function at night due to interference from the sun.
The nation launched its first quantum satellite in 2016. As the world’s first quantum communication satellite, Mozi is expected to provide a technical foundation for China to build a self-developed ultra-secure communication system.
Mar 11, 2019
Quantum computing could change the way the world uses energy
Posted by Genevieve Klien in categories: computing, quantum physics
Mar 11, 2019
Using quantum measurements to fuel a cooling engine
Posted by Genevieve Klien in categories: computing, quantum physics
Researchers at the University of Florence and Istituto dei Sistemi Complessi, in Italy, have recently proved that the invasiveness of quantum measurements might not always be detrimental. In a study published in Physical Review Letters, they showed that this invasive quality can actually be exploited, using quantum measurements to fuel a cooling engine.
Michele Campisi, one of the researchers involved in the study, has been studying quantum phenomena for several years. In his recent work, he investigated whether quantum phenomena can impact the thermodynamics of nanoscopic devices, such as those employed in quantum computers.
“Most colleagues in the field were looking at coherence and entanglement while only few were looking at another at genuine quantum phenomenon, i.e., the quantum measurement process,” Campisi told Phys.org. “Those studies suggested that you need to accompany measurements with feedback control, as in Maxwell’s demon, in order to exploit their potential. I started thinking about it, and eureka—since quantum measurements are very invasive, they are accompanied by energy exchanges, hence can be used to power engines without the need to do feedback control.”
Mar 11, 2019
Researchers Tune in to Smallest Radio Frequency in Quantum Mechanics
Posted by Genevieve Klien in category: quantum physics
Mar 7, 2019
Physicists Want to Use Quantum Particles to Find Out What Happens Inside a Black Hole
Posted by Genevieve Klien in categories: cosmology, particle physics, quantum physics
A new method for analysing the entanglement of scrambled particles could tell us how the Universe still keeps track of information contained by particles that disappear into black holes. It won’t get our quantum information back, but it might at least tell us what happened to it.
Physicists Beni Yoshida from the Perimeter Institute in Canada and Norman Yao from the University of California, Berkeley, have proposed a way to distinguish scrambled quantum information from the noise of meaningless chaos.
While the concept promises a bunch of potential applications in the emerging field of quantum technology, it’s in understanding what’s going on inside the Universe’s most paradoxical places that it might have its biggest pay-off.
Mar 7, 2019
Enter The Quantum World: What The Mechanics Of Subatomic Particles Mean For The Study Of UAP, Our Universe, And Beyond
Posted by Derick Lee in categories: business, government, particle physics, quantum physics
Then the 2017 DoD disclosure occurred, directly contradicting the findings in the Condon Report. We realized we had not discovered all there was to discover — not by a long shot.
AATIP succeeded where others failed simply because our understanding of the physics finally caught up to our observations.
Today, much of our government’s business is conducted behind closed doors, and mostly for good reason.
Mar 6, 2019
The Math That Takes Newton Into the Quantum World
Posted by Genevieve Klien in categories: information science, mathematics, quantum physics, transportation
In my 50s, too old to become a real expert, I have finally fallen in love with algebraic geometry. As the name suggests, this is the study of geometry using algebra. Around 1637, René Descartes laid the groundwork for this subject by taking a plane, mentally drawing a grid on it, as we now do with graph paper, and calling the coordinates x and y. We can write down an equation like x + y = 1, and there will be a curve consisting of points whose coordinates obey this equation. In this example, we get a circle!
It was a revolutionary idea at the time, because it let us systematically convert questions about geometry into questions about equations, which we can solve if we’re good enough at algebra. Some mathematicians spend their whole lives on this majestic subject. But I never really liked it much until recently—now that I’ve connected it to my interest in quantum physics.
If we can figure out how to reduce topology to algebra, it might help us formulate a theory of quantum gravity.
Continue reading “The Math That Takes Newton Into the Quantum World” »
Mar 6, 2019
Can entangled qubits be used to probe black holes?
Posted by Genevieve Klien in categories: computing, cosmology, quantum physics
Physicists have used a seven-qubit quantum computer to simulate the scrambling of information inside a black hole, heralding a future in which entangled quantum bits might be used to probe the mysterious interiors of these bizarre objects.