Analysts at Booz Allen Hamilton warn that Chinese espionage efforts could soon focus on encrypted data.
Category: quantum physics – Page 473
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Erratum: Figures in episode should be Minev et al. (2019), not Minney et al. (2009). Our apologies to the authors!
This is the experiment we talk about:
To Catch and Reverse a Quantum Jump Mid-Flight.
Minev, Mundhada, Shankar, Reinhold, Gutiérrez-Jáuregui, Schoelkopf.
Mirrahimi, Carmichael & Devoret (2019), Nature, v.570, p.200
https://doi.org/10.1038/s41586-019-1287-z.
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Photonics is a branch of technology development that specializes in the creation of devices that can generate, detect or manipulate light. Recently, researchers at Université Paris-Saclay coined a new term for a new photonics sub-field called non-Euclidean photonics.
In a paper published in Physical Review Letters, the team introduced new devices that could be used as a test bed for non-Euclidean photonics. These devices are microlasers in which the laser cavity is a curved surface. In particular, they investigated one-sided, non-orientable surfaces known as Möbius strips.
“Our project started 10 years ago with the Ph.D. thesis of Clement Lafargue,” Melanie Lebental, one of the researchers who carried out the study, told Phys.org. “At the time, we had good expertise on 2D polymer-based microlasers and their use as quantum chaos platforms. We wanted to explore the third dimension, because we expected a lot of different features and a broad variety of dynamical behaviors, particularly regarding the symmetry classes of the laser modes and their polarization features.”
Today’s quantum computers are complicated to build, difficult to scale up, and require temperatures colder than interstellar space to operate. These challenges have led researchers to explore the possibility of building quantum computers that work using photons—particles of light. Photons can easily carry information from one place to another, and photonic quantum computers can operate at room temperature, so this approach is promising. However, although people have successfully created individual quantum “logic gates” for photons, it’s challenging to construct large numbers of gates and connect them in a reliable fashion to perform complex calculations.
Now, Stanford University researchers have proposed a simpler design for photonic quantum computers using readily available components, according to a paper published Nov. 29 in Optica. Their proposed design uses a laser to manipulate a single atom that in turn, can modify the state of the photons via a phenomenon called “quantum teleportation.” The atom can be reset and reused for many quantum gates, eliminating the need to build multiple distinct physical gates, vastly reducing the complexity of building a quantum computer.
“Normally, if you wanted to build this type of quantum computer, you’d have to take potentially thousands of quantum emitters, make them all perfectly indistinguishable, and then integrate them into a giant photonic circuit,” said Ben Bartlett, a Ph.D. candidate in applied physics and lead author of the paper. “Whereas with this design, we only need a handful of relatively simple components, and the size of the machine doesn’t increase with the size of the quantum program you want to run.”
This is what we are experiencing over the next ten years in the near vertical rate of change. We are in these last stages of these changes where we can shape this future into the flowers analogy. The confluence of environmental, social, biological, physical, digital-inspired, technological, quantum-infused, cosmological, creator culture; an endless list. All significantly transforming our lives. We are in the time where creativity, innovation, intuition, imagination, inspiration, purpose, meaning can be driving us.
What we are experiencing forms my top 10 omni wishes for 2022 that will have outsized impact on our lives.
Top Ten Omni Wishes.
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Supersymmetric quantum mechanics enables the description of phenomena exhibiting a supersymmetry only in the space domain. Here, the authors show an underlying time-domain supersymmetry exists in optics, acoustics, and elasticity, and study its properties and potential applicability.
On-chip frequency shifters in the gigahertz range could be used in next generation quantum computers and networks.
The ability to precisely control and change properties of a photon, including polarization, position in space, and arrival time, gave rise to a wide range of communication technologies we use today, including the Internet. The next generation of photonic technologies, such as photonic quantum networks and computers, will require even more control over the properties of a photon.
One of the hardest properties to change is a photon’s color, otherwise known as its frequency, because changing the frequency of a photon means changing its energy.
“It is like using your thumb to control the water spray from a hose,” said Ming Liu, associate professor in UC Riverside’s Marlan. “You know how to get the desired spraying pattern by changing the thumb position, and likewise, in the experiment, we read the light pattern to retrieve the details of the object blocking the five nm-sized light nozzles.”
The light is then focused into a spectrometer, where it forms a tiny ring shape. The researchers can formulate the absorption and scattering images with colors by scanning the probe over an area and recording two spectra for each pixel.
The team expects the new nano-imaging technology can be an important tool to help the semiconductor industry make uniform nanomaterials with consistent properties for use in electronic devices. The new full-color nano-imaging technique could also be used to improve understanding of catalysis, quantum optics, and nanoelectronics.
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Hello from the other side. In this episode find out how quanta can can move through solid objects.
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A team of physicists at the Universities of Bristol, Vienna, the Balearic Islands and the Institute for Quantum Optics and Quantum Information (IQOQI-Vienna) has shown how quantum systems can simultaneously evolve along two opposite time arrows—both forward and backward in time.
The study, published in the latest issue of Communications Physics, necessitates a rethink of how the flow of time is understood and represented in contexts where quantum laws play a crucial role.
For centuries, philosophers and physicists have been pondering the existence of time. Yet, in the classical world, our experience seems to extinguish any doubt that time exists and goes on. Indeed, in nature, processes tend to evolve spontaneously from states with less disorder to states with more disorder, and this propensity can be used to identify an arrow of time. In physics, this is described in terms of ‘entropy’, which is the physical quantity defining the amount of disorder in a system.