Quantum Physics

Quantum Physics News -- ScienceDaily News on quantum physics. Read current research on everything from quantum mechanics to quantum dots. Was Albert Einstein right?

  • High-sensitivity 3-D technique using single-atom measurements
    on March 23, 2018 at 6:13 pm

    Researchers have unveiled a stunningly accurate technique for scientific measurements which uses a single atom as the sensor, with sensitivity down to 100 zeptoNewtons. […]

  • A new kind of quantum bits in two dimensions
    on March 19, 2018 at 4:42 pm

    Two novel materials, each composed of a single atomic layer and the tip of a scanning tunneling microscope - these are the ingredients to create a novel kind of a so-called 'quantum dot'. These extremely small nanostructures allow delicate control of individual electrons by fine-tuning their energy levels directly. Such devices are key for modern quantum technologies. […]

  • A future colorfully lit by mystifying physics of paint-on semiconductors
    on March 19, 2018 at 4:42 pm

    It defies conventional wisdom about semiconductors. It's baffling that it even works. It eludes physics models that try to explain it. This newly tested class of light-emitting semiconductors is so easy to produce from solution that it could be painted onto surfaces to light up our future in myriad colors shining from affordable lasers, LEDs, and even window glass. […]

  • Plasmons triggered in nanotube quantum wells
    on March 16, 2018 at 4:11 pm

    A novel quantum effect observed in a carbon nanotube film could lead to the development of near-infrared lasers and other optoelectronic devices, according to scientists. […]

  • New quantum spin liquid predicted by Nobel Laureate prepared for the first time
    on March 15, 2018 at 2:18 pm

    This achievement is an important step towards building so-called topological quantum computers. […]

  • Quantum mechanics runs hot in a cold plasma
    on March 15, 2018 at 1:13 pm

    Researchers have found a new system that could help yield 'warmer' quantum technologies. […]

  • Graphene flakes for future transistors
    on March 14, 2018 at 6:49 pm

    Tiny and very promising for possible applications in the field of nanoelectronics: they are the graphene nanoflakes. These hexagonal shaped nanostructures would allow to exploit quantum effects to modulate the current flow. Thanks to their intrinsic magnetic properties, they could also represent a significant step forward in the field of spintronics, which is based on the electron spin. […]

  • Physicists quantum simulate topological materials with ultracold atoms
    on March 13, 2018 at 2:17 pm

    A team of physicists has reported the observation of an SPT phase for ultracold atoms using atomic quantum simulation. This work opens the way to expanding the scope of SPT physics with ultracold atoms and studying non-equilibrium quantum dynamics in these exotic systems. […]

  • Riding the (quantum magnetic) wave
    on March 12, 2018 at 5:29 pm

    Scientists have shown that an organic-based magnet can carry waves of quantum mechanical magnetization, called magnons, and convert those waves to electrical signals. It's a breakthrough for the field of magnonics (electronic systems that use magnons instead of electrons) because magnons had previously been sent through inorganic materials that are more difficult to handle. […]

  • Insight into metastability and avalanche dynamics in strongly correlated gases with long-range...
    on March 9, 2018 at 7:02 pm

    The phenomenon of metastability -- when a system is in a state that is stable but not the one of least energy -- is widely observed in nature and technology. Yet, many aspects underlying the mechanisms governing the behavior and dynamics of such systems remain unexplored. Physicists have now demonstrated a promising platform for studying metastability on a fundamental level, using an exquisitely well controlled gas consisting of a few ten thousands of atoms. […]

  • Seeing is believing: Precision atom qubits achieve major quantum computing milestone
    on March 7, 2018 at 2:52 pm

    A unique approach to creating quantum bits from precisely positioned individual atoms in silicon is reaping major rewards, with scientists showing for the first time that they can make two of these atom qubits 'talk' to each other. The team has the ability to see the exact position of their qubits in the solid state. […]

  • Reshaping energy landscape of phonons in nanocrystals
    on March 6, 2018 at 8:37 pm

    Phonons, which are packets of vibrational waves that propagate in solids, play a key role in condensed matter and are involved in various physical properties of materials. In nanotechnology, for example, they affect light emission and charge transport of nanodevices. As the main source of energy dissipation in solid-state systems, phonons are the ultimate bottleneck that limits the operation of functional nanomaterials. […]

  • Physicists lay groundwork to better understand the birth of the universe
    on March 6, 2018 at 7:16 pm

    Scientists have developed the first techniques for describing the thermodynamics of very small systems with very high energy -- like the universe at the start of the Big Bang -- which could lead to a better understanding of the birth of the universe and other cosmological phenomena. […]

  • Roton quasiparticles observed in quantum gas
    on March 5, 2018 at 9:02 pm

    An team of physicists has for the first time observed so-called roton quasiparticles in a quantum gas. Empirically introduced by Landau to explain the bizarre properties of superfluid liquid Helium, these quasiparticles reflect an 'energy softening' in the system as precursor of a crystallization instability. The new work demonstrates similar phenomena in the quantum-gas phase thanks to magnetic interactions, paving the way for a novel understanding of paradigmatic states of quantum fluids, such as supersolids. […]

  • Massive astrophysical objects governed by subatomic equation
    on March 5, 2018 at 4:15 pm

    Surprisingly, a quintessential equation of quantum mechanics emerges while studying astronomical disks of orbiting material. […]

  • New way to 'see' the quantum world
    on March 5, 2018 at 4:13 pm

    Scientists have invented a new imaging technique that produces rapid, precise measurements of quantum behavior in an atomic clock in the form of near-instant visual art. […]

  • Controlled coupling of light and matter
    on March 5, 2018 at 2:36 pm

    Researchers have built the foundations for a new field of nano-optics: they have succeeded in controlling the coupling of light and matter at room temperature. […]

  • Scientists observe a new quantum particle with properties of ball lightning
    on March 2, 2018 at 7:48 pm

    Scientists have created, for the first time a three-dimensional skyrmion in a quantum gas. The skyrmion was predicted theoretically over 40 years ago, but only now has it been observed experimentally. […]

  • Want more efficient simulators? Store time in a quantum superposition
    on March 2, 2018 at 3:17 pm

    Computer models of systems such as a city's traffic flow or neural firing in the brain tends to use up a lot of memory. But a new approach with quantum simulators could significantly cut that memory use by taking a quantum approach to time, suggest researchers. […]

  • Practical spin wave transistor one step closer
    on March 1, 2018 at 7:41 pm

    Physicists have managed to alter the flow of spin waves through a magnet, using only an electrical current. This is a huge step towards the spin transistor that is needed to construct spintronic devices. These promise to be much more energy efficient than conventional electronics. […]

  • Dressing atoms in an ultracold soup
    on February 28, 2018 at 7:44 pm

    Using lasers, US and Austrian physicists have coaxed atoms in an ultracold strontium gas into complex structures unlike any previously seen in nature. Researchers created 'Rydberg polarons' in a gas at least 1 million times colder than deep space. […]

  • Solution to the hyperfine puzzle in reach: Measurements on bismuth nuclei bridge reported gap...
    on February 28, 2018 at 2:22 pm

    Last year, physicists cast doubt on our current understanding of the interplay between electrons and atomic nuclei, and are now upping the ante by proposing a solution to this so-called “hyperfine puzzle”. They have made new measurements of the magnetic properties of bismuth atomic nuclei. […]

  • Individual quantum dots imaged in 3-D for first time
    on February 27, 2018 at 4:55 pm

    Researchers have developed an imaging technique that uses a tiny, super sharp needle to nudge a single nanoparticle into different orientations and capture 2-D images to help reconstruct a 3-D picture. The method demonstrates imaging of individual nanoparticles at different orientations while in a laser-induced excited state. […]

  • Teaching quantum physics to a computer
    on February 27, 2018 at 4:16 pm

    Physicists have used machine learning to teach a computer how to predict the outcomes of quantum experiments. The results could prove to be essential for testing future quantum computers. […]

  • Helium ions open whole new world of materials
    on February 27, 2018 at 2:16 pm

    Scientists have found an exciting new way to manipulate and design materials of the future at the atomic level and change the way they behave at a larger scale that opens the way to new applications such as early cancer biomarkers. […]

  • Artificial intelligence techniques reconstruct mysteries of quantum systems
    on February 26, 2018 at 5:25 pm

    The same techniques used to train self-driving cars and chess-playing computers are now helping physicists explore the complexities of the quantum world. For the first time, physicists have demonstrated that machine learning can reconstruct a quantum system based on relatively few experimental measurements. This method will allow scientists to thoroughly probe systems of particles exponentially faster than conventional, brute-force techniques. […]

  • Largest molecular spin found close to a quantum phase transition
    on February 26, 2018 at 3:33 pm

    An international research team has synthesized a new magnetic molecule. The team has confirmed that this reveals the largest ground state spin attained so far. […]

  • Exotic state of matter: An atom full of atoms
    on February 26, 2018 at 1:58 pm

    Scientists have provided proof for a new state of matter: an electron orbits a nucleus at a great distance, while many other atoms are bound inside the orbit. […]

  • Attosecond physics: A keen sense for molecules
    on February 23, 2018 at 5:23 pm

    Laser physicists have developed an extremely powerful broadband infrared light source. This light source opens up a whole new range of opportunities in medicine, life science, and material analysis. […]

  • Developing reliable quantum computers
    on February 22, 2018 at 7:50 pm

    Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can't manage. But how do you test a quantum computer to ensure it is working reliably? Depending on the algorithmic task, this could be an easy or a very difficult certification problem. An international team of researchers has taken an important step towards solving a difficult variation of this problem, using a statistical approach. […]