#PhysicsNEWS
➖@Phytimes➖
Using neutron stars to detect dark matter
The quest to uncover the nature of dark matter is one of the greatest challenges in science today, but the key to finally understanding this mysterious substance may well lie in the stars.
➖@Phytimes➖
➖@Phytimes➖
Using neutron stars to detect dark matter
The quest to uncover the nature of dark matter is one of the greatest challenges in science today, but the key to finally understanding this mysterious substance may well lie in the stars.
➖@Phytimes➖
phys.org
Using neutron stars to detect dark matter
The quest to uncover the nature of dark matter is one of the greatest challenges in science today, but the key to finally understanding this mysterious substance may well lie in the stars.
#PhysicsNEWS
➖@Phytimes➖
CMS collaboration has observed three J/ψ particles emerging from a single collision between two protons
It's a triple treat. By sifting through data from particle collisions at the Large Hadron Collider (LHC), the CMS collaboration has seen not one, not two but three J/ψ particles emerging from a single collision between two protons. In addition to being a first for particle physics, the observation opens a new window into how quarks and gluons are distributed inside the proton.
➖@Phytimes➖
➖@Phytimes➖
CMS collaboration has observed three J/ψ particles emerging from a single collision between two protons
It's a triple treat. By sifting through data from particle collisions at the Large Hadron Collider (LHC), the CMS collaboration has seen not one, not two but three J/ψ particles emerging from a single collision between two protons. In addition to being a first for particle physics, the observation opens a new window into how quarks and gluons are distributed inside the proton.
➖@Phytimes➖
phys.org
CMS collaboration has observed three J/ψ particles emerging from a single collision between two protons
It's a triple treat. By sifting through data from particle collisions at the Large Hadron Collider (LHC), the CMS collaboration has seen not one, not two but three J/ψ particles emerging from a single ...
#PhysicsNEWS
➖@Phytimes➖
Strengthening the second law of thermodynamics
According to the second law of thermodynamics, the total entropy of a closed process can increase or stay the same, but never decrease. The second law guarantees, for example, that an egg can wobble off a table and leave a mess on the floor but that such a mess will never spontaneously form an egg and leap back on the table. Or that air will escape a balloon but never, on its own accord, inflate it. Since at least the 19th century, physicists have been investigating the role of entropy in information theory—studying the energy transactions of adding or erasing bits from computers, for example.
➖@Phytimes➖
➖@Phytimes➖
Strengthening the second law of thermodynamics
According to the second law of thermodynamics, the total entropy of a closed process can increase or stay the same, but never decrease. The second law guarantees, for example, that an egg can wobble off a table and leave a mess on the floor but that such a mess will never spontaneously form an egg and leap back on the table. Or that air will escape a balloon but never, on its own accord, inflate it. Since at least the 19th century, physicists have been investigating the role of entropy in information theory—studying the energy transactions of adding or erasing bits from computers, for example.
➖@Phytimes➖
phys.org
Strengthening the second law of thermodynamics
According to the second law of thermodynamics, the total entropy of a closed process can increase or stay the same, but never decrease. The second law guarantees, for example, that an egg can wobble off ...
#PhysicsNEWS
➖@Phytimes➖
Researchers achieve first quantum simulation of baryons
A team of researchers led by an Institute for Quantum Computing (IQC) faculty member performed the first-ever simulation of baryons—fundamental quantum particles—on a quantum computer.
➖@Phytimes➖
➖@Phytimes➖
Researchers achieve first quantum simulation of baryons
A team of researchers led by an Institute for Quantum Computing (IQC) faculty member performed the first-ever simulation of baryons—fundamental quantum particles—on a quantum computer.
➖@Phytimes➖
phys.org
Researchers achieve first quantum simulation of baryons
A team of researchers led by an Institute for Quantum Computing (IQC) faculty member performed the first-ever simulation of baryons—fundamental quantum particles—on a quantum computer.
#PhysicsNEWS
➖@Phytimes➖
Rare Einstein manuscript set to fetch millions
A rare manuscript by theoretical physicist Albert Einstein goes under the hammer in Paris on Tuesday, with auctioneers aiming for a stratospheric price tag.
➖@Phytimes➖
➖@Phytimes➖
Rare Einstein manuscript set to fetch millions
A rare manuscript by theoretical physicist Albert Einstein goes under the hammer in Paris on Tuesday, with auctioneers aiming for a stratospheric price tag.
➖@Phytimes➖
phys.org
Rare Einstein manuscript set to fetch millions
A rare manuscript by theoretical physicist Albert Einstein goes under the hammer in Paris on Tuesday, with auctioneers aiming for a stratospheric price tag.
#PhysicsNEWS
➖@Phytimes➖
Research looks at entropy generation from hydrodynamic mixing in ICF experiments
Research conducted at Lawrence Livermore National Laboratory (LLNL) is taking a closer look at entropy—the measure of internal energy per unit temperature that is unavailable for doing useful work—in experiments at the National Ignition Facility (NIF).
➖@Phytimes➖
➖@Phytimes➖
Research looks at entropy generation from hydrodynamic mixing in ICF experiments
Research conducted at Lawrence Livermore National Laboratory (LLNL) is taking a closer look at entropy—the measure of internal energy per unit temperature that is unavailable for doing useful work—in experiments at the National Ignition Facility (NIF).
➖@Phytimes➖
phys.org
Research looks at entropy generation from hydrodynamic mixing in ICF experiments
Research conducted at Lawrence Livermore National Laboratory (LLNL) is taking a closer look at entropy—the measure of internal energy per unit temperature that is unavailable for doing useful work—in ...
#PhysicsNEWS
➖@Phytimes➖
Researchers propose a simpler design for quantum computers
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.
➖@Phytimes➖
➖@Phytimes➖
Researchers propose a simpler design for quantum computers
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.
➖@Phytimes➖
phys.org
Researchers propose a simpler design for quantum computers
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 ...
#PhysicsNEWS
➖@Phytimes➖
Three-dimensional imaging with optical frequency combs
Holography is a powerful technique of photography of a light field without a lens for 3D imaging and display. Now, scientists at the Max-Planck Institute of Quantum Optics are moving holography forward by implementing it with optical frequency combs. Thousands of holograms over all colors of the rainbow can be recorded. Via digital processing, each hologram provides a three-dimensional image of the scene in which the focusing distance can be chosen at will. Combining all these holograms renders the geometrical shape of the three-dimensional object with high precision and no ambiguity. At the same time, other diagnostics can be performed by the frequency combs: Here, the scientists show molecule-selective imaging of a cloud of ammonia vapor.
➖@Phytimes➖
➖@Phytimes➖
Three-dimensional imaging with optical frequency combs
Holography is a powerful technique of photography of a light field without a lens for 3D imaging and display. Now, scientists at the Max-Planck Institute of Quantum Optics are moving holography forward by implementing it with optical frequency combs. Thousands of holograms over all colors of the rainbow can be recorded. Via digital processing, each hologram provides a three-dimensional image of the scene in which the focusing distance can be chosen at will. Combining all these holograms renders the geometrical shape of the three-dimensional object with high precision and no ambiguity. At the same time, other diagnostics can be performed by the frequency combs: Here, the scientists show molecule-selective imaging of a cloud of ammonia vapor.
➖@Phytimes➖
phys.org
Three-dimensional imaging with optical frequency combs
Holography is a powerful technique of photography of a light field without a lens for 3D imaging and display. Now, scientists at the Max-Planck Institute of Quantum Optics are moving holography forward ...
#PhysicsNEWS
➖@Phytimes➖
Studying cosmic expansion using methods from many-body physics
It is almost always assumed in cosmological calculations that there is a even distribution of matter in the universe. This is because the calculations would be much too complicated if the position of every single star were to be included. In reality, the universe is not uniform: in some places there are stars and planets, in others there is just a void. Physicists Michael te Vrugt and Prof. Raphael Wittkowski from the Institute of Theoretical Physics and the Center for Soft Nanoscience (SoN) at the University of Münster have, together with physicist Dr. Sabine Hossenfelder from the Frankfurt Institute for Advanced Studies (FIAS), developed a new model for this problem. Their starting point was the Mori-Zwanzig formalism, a method for describing systems consisting of a large number of particles with a small number of measurands. The results of the study have now been published in the journal Physical Review Letters.
➖@Phytimes➖
➖@Phytimes➖
Studying cosmic expansion using methods from many-body physics
It is almost always assumed in cosmological calculations that there is a even distribution of matter in the universe. This is because the calculations would be much too complicated if the position of every single star were to be included. In reality, the universe is not uniform: in some places there are stars and planets, in others there is just a void. Physicists Michael te Vrugt and Prof. Raphael Wittkowski from the Institute of Theoretical Physics and the Center for Soft Nanoscience (SoN) at the University of Münster have, together with physicist Dr. Sabine Hossenfelder from the Frankfurt Institute for Advanced Studies (FIAS), developed a new model for this problem. Their starting point was the Mori-Zwanzig formalism, a method for describing systems consisting of a large number of particles with a small number of measurands. The results of the study have now been published in the journal Physical Review Letters.
➖@Phytimes➖
phys.org
Studying cosmic expansion using methods from many-body physics
It is almost always assumed in cosmological calculations that there is a even distribution of matter in the universe. This is because the calculations would be much too complicated if the position of ...
#PhysicsNEWS
➖@Phytimes➖
Making lasers more efficient, versatile and compact
Their inner workings reside in the realm of physics, but lasers make everyday life possible. Talking on a cell phone or googling COVID stats while your apples and oranges are scanned at the checkout counter—lasers at every step.
➖@Phytimes➖
➖@Phytimes➖
Making lasers more efficient, versatile and compact
Their inner workings reside in the realm of physics, but lasers make everyday life possible. Talking on a cell phone or googling COVID stats while your apples and oranges are scanned at the checkout counter—lasers at every step.
➖@Phytimes➖
phys.org
Making lasers more efficient, versatile and compact
Their inner workings reside in the realm of physics, but lasers make everyday life possible. Talking on a cell phone or googling COVID stats while your apples and oranges are scanned at the checkout counter—lasers ...
#PhysicsNEWS
➖@Phytimes➖
Physical features boost the efficiency of quantum simulations
Recent theoretical breakthroughs have settled two long-standing questions about the viability of simulating quantum systems on future quantum computers, overcoming challenges from complexity analyses to enable more advanced algorithms. Featured in two publications, the work by a quantum team at Los Alamos National Laboratory shows that physical properties of quantum systems allow for faster simulation techniques.
➖@Phytimes➖
➖@Phytimes➖
Physical features boost the efficiency of quantum simulations
Recent theoretical breakthroughs have settled two long-standing questions about the viability of simulating quantum systems on future quantum computers, overcoming challenges from complexity analyses to enable more advanced algorithms. Featured in two publications, the work by a quantum team at Los Alamos National Laboratory shows that physical properties of quantum systems allow for faster simulation techniques.
➖@Phytimes➖
phys.org
Physical features boost the efficiency of quantum simulations
Recent theoretical breakthroughs have settled two long-standing questions about the viability of simulating quantum systems on future quantum computers, overcoming challenges from complexity analyses ...
#PhysicsNEWS
➖@Phytimes➖
Exotic six-quark particle predicted by supercomputers
The predicted existence of an exotic particle made up of six elementary particles known as quarks by RIKEN researchers could deepen our understanding of how quarks combine to form the nuclei of atoms.
➖@Phytimes➖
➖@Phytimes➖
Exotic six-quark particle predicted by supercomputers
The predicted existence of an exotic particle made up of six elementary particles known as quarks by RIKEN researchers could deepen our understanding of how quarks combine to form the nuclei of atoms.
➖@Phytimes➖
phys.org
Exotic six-quark particle predicted by supercomputers
The predicted existence of an exotic particle made up of six elementary particles known as quarks by RIKEN researchers could deepen our understanding of how quarks combine to form the nuclei of atoms.
#PhysicsNEWS
➖@Phytimes➖
New spin amplifier accelerates search for dark matter
Despite astrophysical evidence for the existence of dark matter, direct detection of its interaction with particles and fields of the standard model has not been achieved. Illuminating dark matter is the best hope of making progress in understanding the universe and would provide insights into astrophysics, cosmology and physics beyond the standard model.
➖@Phytimes➖
➖@Phytimes➖
New spin amplifier accelerates search for dark matter
Despite astrophysical evidence for the existence of dark matter, direct detection of its interaction with particles and fields of the standard model has not been achieved. Illuminating dark matter is the best hope of making progress in understanding the universe and would provide insights into astrophysics, cosmology and physics beyond the standard model.
➖@Phytimes➖
phys.org
New spin amplifier accelerates search for dark matter
Despite astrophysical evidence for the existence of dark matter, direct detection of its interaction with particles and fields of the standard model has not been achieved. Illuminating dark matter is ...
#PhysicsNEWS
➖@Phytimes➖
Quantum theory needs complex numbers
Physicists construct theories to describe nature. Let us explain it through an analogy with something that we can do in our everyday life, like going on a hike in the mountains. To avoid getting lost, we generally use a map. The map is a representation of the mountain, with its houses, rivers, paths, etc. By using it, it is rather easy to find our way to the top of the mountain. But the map is not the mountain. The map constitutes the theory we use to represent the mountain's reality.
➖@Phytimes➖
➖@Phytimes➖
Quantum theory needs complex numbers
Physicists construct theories to describe nature. Let us explain it through an analogy with something that we can do in our everyday life, like going on a hike in the mountains. To avoid getting lost, we generally use a map. The map is a representation of the mountain, with its houses, rivers, paths, etc. By using it, it is rather easy to find our way to the top of the mountain. But the map is not the mountain. The map constitutes the theory we use to represent the mountain's reality.
➖@Phytimes➖
phys.org
Quantum theory needs complex numbers
Physicists construct theories to describe nature. Let us explain it through an analogy with something that we can do in our everyday life, like going on a hike in the mountains. To avoid getting lost, ...
#PhysicsNEWS
➖@Phytimes➖
Gravitational wave scientists set their sights on dark matter
The technologies behind one of the biggest scientific breakthroughs of the century—the detection of gravitational waves—are now being used in the long-standing search for dark matter.
➖@Phytimes➖
➖@Phytimes➖
Gravitational wave scientists set their sights on dark matter
The technologies behind one of the biggest scientific breakthroughs of the century—the detection of gravitational waves—are now being used in the long-standing search for dark matter.
➖@Phytimes➖
phys.org
Gravitational wave scientists set their sights on dark matter
The technologies behind one of the biggest scientific breakthroughs of the century—the detection of gravitational waves—are now being used in the long-standing search for dark matter.
#PhysicsNEWS
➖@Phytimes➖
Maybe 'boson clouds' could explain dark matter
The nature of dark matter continues to perplex astronomers. As the search for dark matter particles continues to turn up nothing, it's tempting to throw out the dark matter model altogether, but indirect evidence for the stuff continues to be strong. So what is it? One team has an idea, and they've published the results of their first search.
➖@Phytimes➖
➖@Phytimes➖
Maybe 'boson clouds' could explain dark matter
The nature of dark matter continues to perplex astronomers. As the search for dark matter particles continues to turn up nothing, it's tempting to throw out the dark matter model altogether, but indirect evidence for the stuff continues to be strong. So what is it? One team has an idea, and they've published the results of their first search.
➖@Phytimes➖
phys.org
Maybe 'boson clouds' could explain dark matter
The nature of dark matter continues to perplex astronomers. As the search for dark matter particles continues to turn up nothing, it's tempting to throw out the dark matter model altogether, but indirect ...
#PhysicsNEWS
➖@Phytimes➖
Light-scattering dynamics could inform interpretation of Big Bang remnants
By confirming certain light-scattering dynamics first proposed a half-century ago, University of Nebraska–Lincoln physicists are casting fresh eyes on the universe-birthing fireworks ignited by the Big Bang nearly 14 billion years ago.
➖@Phytimes➖
➖@Phytimes➖
Light-scattering dynamics could inform interpretation of Big Bang remnants
By confirming certain light-scattering dynamics first proposed a half-century ago, University of Nebraska–Lincoln physicists are casting fresh eyes on the universe-birthing fireworks ignited by the Big Bang nearly 14 billion years ago.
➖@Phytimes➖
phys.org
Light-scattering dynamics could inform interpretation of Big Bang remnants
By confirming certain light-scattering dynamics first proposed a half-century ago, University of Nebraska–Lincoln physicists are casting fresh eyes on the universe-birthing fireworks ignited by the ...
#PhysicsNEWS
➖@Phytimes➖
The mystery of the small dimensionless number with a big effect
Non-dimensional numbers may sound like a scary, incomprehensible term reserved for scientists in a laboratory, but you have more experience with them than you know. The Mach number measures the speed of an object relative to the speed of sound, so whether measuring in kilometers per second or miles per hour, Mach 2 is always twice the speed of sound. With the COVID-19 pandemic still raging worldwide, R0 is an important number constantly in the news that measures how many people a person will infect over the course of an illness, whether that time period is days, weeks or months.
➖@Phytimes➖
➖@Phytimes➖
The mystery of the small dimensionless number with a big effect
Non-dimensional numbers may sound like a scary, incomprehensible term reserved for scientists in a laboratory, but you have more experience with them than you know. The Mach number measures the speed of an object relative to the speed of sound, so whether measuring in kilometers per second or miles per hour, Mach 2 is always twice the speed of sound. With the COVID-19 pandemic still raging worldwide, R0 is an important number constantly in the news that measures how many people a person will infect over the course of an illness, whether that time period is days, weeks or months.
➖@Phytimes➖
phys.org
The mystery of the small dimensionless number with a big effect
Non-dimensional numbers may sound like a scary, incomprehensible term reserved for scientists in a laboratory, but you have more experience with them than you know. The Mach number measures the speed ...
#PhysicsNEWS
➖@Phytimes➖
Transmissive-detected laser speckle imaging for blood flow monitoring in thick tissue
Blood flow velocity is an important parameter reflecting vascular function. Abnormal vascular function is closely related to the occurrence and development of many diseases, such as diabetes, arteriosclerosis, thrombosis and so on. Therefore, the monitoring of flow velocity is not only an important research target, but also an important clinical indicator.
➖@Phytimes➖
➖@Phytimes➖
Transmissive-detected laser speckle imaging for blood flow monitoring in thick tissue
Blood flow velocity is an important parameter reflecting vascular function. Abnormal vascular function is closely related to the occurrence and development of many diseases, such as diabetes, arteriosclerosis, thrombosis and so on. Therefore, the monitoring of flow velocity is not only an important research target, but also an important clinical indicator.
➖@Phytimes➖
phys.org
Transmissive-detected laser speckle imaging for blood flow monitoring in thick tissue
Blood flow velocity is an important parameter reflecting vascular function. Abnormal vascular function is closely related to the occurrence and development of many diseases, such as diabetes, arteriosclerosis, ...
#PhysicsNEWS
➖@Phytimes➖
Black holes and dark matter—are they one and the same?
Primordial black holes created in the first instants after the Big Bang—tiny ones smaller than the head of a pin and supermassive ones covering billions of miles—may account for all of the dark matter in the universe.
➖@Phytimes➖
➖@Phytimes➖
Black holes and dark matter—are they one and the same?
Primordial black holes created in the first instants after the Big Bang—tiny ones smaller than the head of a pin and supermassive ones covering billions of miles—may account for all of the dark matter in the universe.
➖@Phytimes➖
phys.org
Black holes and dark matter—are they one and the same?
Primordial black holes created in the first instants after the Big Bang—tiny ones smaller than the head of a pin and supermassive ones covering billions of miles—may account for all of the dark matter ...