Quantum Physics news

Proposed Spacetime Structure Could Provide Hints for Quantum Gravity Theory

Physics / Quantum Physics

19 hours ago | 4.8 / 5 (28) | 16

(PhysOrg.com) -- Spacetime, which consists of three dimensions of space and one time dimension, is such a large, abstract concept that scientists have a very difficult time understanding and defining it. Moreover, ...

Everlasting Quantum Wave: Physicists Predict New Form of Soliton in Ultracold Gases

Physics / Quantum Physics

17 hours ago | 4.7 / 5 (10) | 2

(PhysOrg.com) -- Solitary waves that run a long distance without losing their shape or dying out are a special class of waves called solitons. These everlasting waves are exotic enough, but theoreticians at ...

Rice physicists find reappearing quantum trios

Physics / Quantum Physics

Dec 11, 2009 | 4.8 / 5 (43) | 8

Using atoms at temperatures colder than deep space, Rice University physicists have delivered overwhelming proof for a once-scoffed-at theory that's become a hotbed for research some 40 years after it first ...

JQI researchers create entangled photons from quantum dots

Physics / Quantum Physics

Nov 18, 2009 | 4.3 / 5 (8) | 1

To exploit the quantum world to the fullest, a key commodity is entanglement—the spooky, distance-defying link that can form between objects such as atoms even when they are completely shielded from one another. Now, physicists ...

Rice ties in race for atomic-scale breakthrough

Physics / Quantum Physics

Nov 17, 2009 | 4.7 / 5 (3) | 0

Everybody loves a race to the wire, even when the result is a tie. The great irony is the ultraprecise clocks that could result from this competition could probably break any tie.

Scientists demonstrate 'universal' programmable quantum processor

Physics / Quantum Physics

Nov 15, 2009 | 4.5 / 5 (24) | 11

Physicists at the National Institute of Standards and Technology have demonstrated the first "universal" programmable quantum information processor able to run any program allowed by quantum mechanics -- th ...

Solving big problems with new quantum algorithm

Physics / Quantum Physics

Nov 09, 2009 | 4.6 / 5 (32) | 0

(PhysOrg.com) -- In a recently published paper, Aram Harrow at the University of Bristol and colleagues from MIT in the United States have discovered a quantum algorithm that solves large problems much faster ...

First Bose-Einstein condensation of strontium

Physics / Quantum Physics

Nov 09, 2009 | 4.8 / 5 (10) | 5

In an international first, scientists from the Institute of Quantum Optics and Quantum Information (IQOQI, Austria) produced a Bose-Einstein condensate of the alkaline-earth element strontium, thus narrowly ...

Quantum gas microscope offers glimpse of quirky ultracold atoms

Physics / Quantum Physics

Nov 04, 2009 | 4.6 / 5 (19) | 4

(PhysOrg.com) -- Physicists at Harvard University have created a quantum gas microscope that can be used to observe single atoms at temperatures so low the particles follow the rules of quantum mechanics, ...

Creating a six-qubit cluster state

Physics / Quantum Physics

Nov 02, 2009 | 4.6 / 5 (10) | 2

(PhysOrg.com) -- Many scientists believe that quantum entanglement is required in order for effective quantum computing. Entanglement takes place when there is a connection that exists between two objects - even when they ...

Study Shows Time Traveling May Not Increase Computational Power

Physics / Quantum Physics

Oct 22, 2009 | 4.1 / 5 (26) | 5

(PhysOrg.com) -- For more than 50 years, physicists have been intrigued by the concept of closed time-like curves (CTCs). Because a CTC returns to its starting point, it raises the possibility of traveling backward in time. ...

Field experiment on a robust hierarchical metropolitan quantum cryptography network

Physics / Quantum Physics

Oct 16, 2009 | 5 / 5 (1) | 0

Key Laboratory of Quantum Information (CAS), University of Science and Technology of China has recently demonstrated a metropolitan Quantum Cryptography Network (QCN) for Government Administration in Wuhu, China. The project ...

Quantum Computer Chips Now One Step Closer To Reality

Physics / Quantum Physics

Oct 15, 2009 | 4.6 / 5 (16) | 0

In the quest for smaller, faster computer chips, researchers are increasingly turning to quantum mechanics -- the exotic physics of the small. The problem: the manufacturing techniques required to make quantum devices have ...

Quantum-limited Measurement Method for Nanosensors

Physics / Quantum Physics

Oct 14, 2009 | 4.3 / 5 (4) | 0

(PhysOrg.com) -- (PhysOrg.com) -- A team of scientists from the Max Planck Institute of Quantum Optics and the Ludwig Maximilians University have succeeded in applying a novel optical method to nano-mechanical ...

Atomtronic transistor and diode could advance quantum computing

Physics / Quantum Physics

Oct 09, 2009 | 4.6 / 5 (24) | 5

(PhysOrg.com) -- What if atoms could be used to perform the functions currently the province of electronic devices? The goal of atomtronics is to do just that by creating analogues to the common items found in electronic ...

Quantum computing may actually be useful, after all

Physics / Quantum Physics

Oct 09, 2009 | 4.6 / 5 (35) | 9

(PhysOrg.com) -- In recent years, quantum computers have lost some of their luster. In the 1990s, it seemed that they might be able to solve a class of difficult but common problems — the so-called NP-complete ...

Physicists Demonstrate Three-Color Entanglement

Physics / Quantum Physics

Oct 07, 2009 | 4.3 / 5 (25) | 3

(PhysOrg.com) -- For the first time, physicists have demonstrated the quantum entanglement of three light beams, all of different wavelengths. Entanglement of two light beams of different wavelengths has already ...

Scientists discover quantum fingerprints of chaos

Physics / Quantum Physics

Oct 07, 2009 | 4.8 / 5 (28) | 1

Chaotic behavior is the rule, not the exception, in the world we experience through our senses, the world governed by the laws of classical physics.