### Scientists set quantum speed limit

University of California, Berkeley, scientists have proved a fundamental relationship between energy and time that sets a "quantum speed limit" on processes ranging from quantum computing and tunneling to ...

### Discovery of uncertainty relations beyond the Heisenberg

In the quantum world, the famous Heisenberg uncertainty principle bounds the product of the variances of two incompatible observables such as the position and the momentum of a particle by the Planck constant. Heisenberg, ...

### Tricking the uncertainty principle

(Phys.org) —Caltech researchers have found a way to make measurements that go beyond the limits imposed by quantum physics.

### Proving uncertainty: First rigorous formulation supporting Heisenberg's famous 1927 principle

Nearly 90 years after Werner Heisenberg pioneered his uncertainty principle, a group of researchers from three countries has provided substantial new insight into this fundamental tenet of quantum physics ...

### A bound on the natural width of the Higgs boson

CMS has improved the constraints on the Higgs width, a fundamental property of this unique new particle, by more than two orders of magnitude.

### Researchers use squeezed light to enhance photonic force microscopy

(Phys.org) —A team of researchers working in Australia has used "squeezed light" to enhance the sharpness of images produced using photonic force microscopy. In their paper published in Physical Review Le ...

### Researchers use quantum entanglement to improve differential interference contrast microscopy

(Phys.org)—A team of researchers with members from Hokkaido and Osaka Universities in Japan has used quantum entanglement of photons to improve image results created using differential interference contrast ...

### Research team challenges the limits of famous quantum principle

(Phys.org) —A team of physicists is challenging the very limits of Heisenberg's famous uncertainty principle by measuring quantum particles with unprecedented accuracy.

### Teleportation just got easier—but not for you, unfortunately

Thanks to two studies published in Nature last Thursday, the chance of successful teleportation has considerably increased. Which is a good thing, right? ...

### Hydrogen atoms under the magnifying glass

To describe the microscopic properties of matter and its interaction with the external world, quantum mechanics uses wave functions, whose structure and time dependence is governed by the Schrödinger equation. ...

### Curves in spacetime violate Heisenberg's uncertainty principle

(Phys.org)—If an object traveling through spacetime can loop back in time in a certain way, then its trajectory can allow a pair of its components to be measured with perfect accuracy, violating Heisenberg's ...

### Researchers demonstrate Heisenberg uncertainty principle at macro level

(Phys.org)—Physicists working at the University of Colorado have succeeded in demonstrating one of the major tenets of quantum mechanics—namely the Heisenberg uncertainty principle—at the macro level. In their paper ...

### Physicists extend entanglement in Einstein experiment

(Phys.org)—Using a photon fission process, physicists have split a single photon into a pair of daughter photons and then split one of the daughter photons into a pair of granddaughters to create a total ...

### More certainty on uncertainty's quantum mechanical role

Scientists who study the ultra-small world of atoms know it is impossible to make certain simultaneous measurements, for example finding out both the location and momentum of an electron, with an arbitrarily ...