Category: Quantum Physics
quantum memory

Tunable diamond string may hold key to quantum memory

Electrodes stretch diamond strings to increase the frequency of atomic vibrations to which an electron is sensitive, just like tightening a guitar string increases the frequency or pitch of the string. The tension quiets a qubit‘s environment and improves memory from tens to several hundred nanoseconds, enough time to do many operations on a quantum […]

Quantum effects observed in photosynthesis

Quantum effects observed in photosynthesis

The figure shows the photosynthetic complex of light-harvesting green sulfur bacteria the green and yellow circles highlight the two molecules simultaneously excited. Credit: dr. Thomas la Cour Jansen/University of Groningen Molecules that are involved in photosynthesis exhibit the same quantum effects as non-living matter, concludes an international team of scientists including University of Groningen theoretical […]

Stronger-than-binary correlations experimentally demonstrated for the first time

Stronger than binary correlations experimentally demonstrated for the first time

For the first time, physicists have experimentally demonstrated ternary—rather than binary—quantum correlations between entangled objects. The results show that the quantum measurement process cannot be described as a binary process (having two possible outcomes), but rather stronger-than-binary ternary measurements (which have three possible outcomes) should be considered in order to fully understand how the quantum […]

Can a quantum drum vibrate and stand still at the same time?

Can a quantum drum vibrate and stand still at the same time?

  In quantum mechanics, objects can behave like both particles and waves. The objects can be here and there at the same time. Such counterintuitive behavior is typically confined to the microscopic realm and the question why don’t we see such behavior in everyday objects? Now, A team of researchers from the UK and Australia has developed a […]

Entangled atoms shine in unison

Entangled atoms shine in unison

Physicists compared the photon interference produced by entangled and non-entangled barium atoms. (Credit: IQOQI Innsbruck/Harald Ritsch) A team led by experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for […]

Physicists Built a Real Quantum Newton's Cradle

Physicists Built a Real Quantum Newton’s Cradle

To understand the most complex science, sometimes you have to start simple – and a new experiment inspired by a desk toy has revealed solutions to some of the mysteries surrounding quantum physics. The toy in question is  Newton’s cradle, that carefully balanced row of balls that clack into one another and can keep moving for […]

Next step towards quantum network based on micromechanical oscillators

Next step towards quantum network based on micromechanical oscillators

Artists intuition of two mechanical oscillators that are brought into a quantum entangled state through a light field inside an optical interferometer. The two systems exhibit stronger than classically possible correlations, often referred to as spooky action at a distance. This demonstration of entanglement between engineered systems could help to directly realize a quantum network. […]

A new Bose-Einstein condensate has been Created

A new Bose-Einstein condensate has been Created

The wavelength of emitted light grows, that is, the energy decreases, along with the gold nanorod array. A Bose-Einstein condensate forms when an energy minimum of the lattice is reached. Researchers From  Aalto University, Finland, have created a Bose-Einstein condensate of light coupled with metal electrons, so-called surface plasmon polaritons. Nearly 100 years ago, Albert […]

quantum sensors

New NIST chip hints at quantum sensors of the future

NIST’s prototype chip for measuring important quantities such as length with quantum precision. The device works by using a laser to probe atoms to generate infrared light at a precise wavelength. The NIST chip packs a tiny cloud of atoms and structures for guiding light waves into less than 1 square centimeter. The atoms are […]

non-equilibrium many-body physics

A novel test bed for non-equilibrium many-body physics

The behavior of electrons in a material is typically difficult to predict. Novel insight comes now from experiments and simulations performed by physicists who have studied electronic transport properties in a one-dimensional quantum wire containing a mesoscopic lattice. Whether a material is, for example, a metal or an insulator depends on a range of microscopic […]