Quantum vacuum: Less than zero energy

The Quantum Vacuum

Energy is a quantity that must always be positive -- at least that's what our intuition tells us. If every single particle is removed from a certain volume until there is nothing left that could possibly carry energy, then a limit has been reached. Or has it? Is it still

Austrian Discovery Could Open the Door to Quantum Teleportation

Erik Lucero/University of California Santa Barabra

The race to further understand and eventually harness the potential power of the quantum world is well underway with each year bringing scientists closer to technologies such as quantum computers and quantum encryption.More recently, a group of scientists from the University of Vienna and the Austrian Academy of Sciences, in

Researchers create scalable platform for on-chip quantum emitters

Researchers create scalable platform for on-chip quantum emitters

Household lightbulbs give off a chaotic torrent of energy, as trillions of miniscule light particles—called photons—reflect and scatter in all directions. Quantum light sources, on the other hand, are like light guns that fire single photons one by one, each time they are triggered, enabling them to carry hack-proof digital

What Does Quantum Theory Actually Tell Us about Reality?

Quantum Theory

For a demonstration that overturned the great Isaac Newton’s ideas about the nature of light, it was staggeringly simple. It “may be repeated with great ease, wherever the sun shines,” the English physicist Thomas Young told the members of the Royal Society in London in November 1803, describing what is

Researchers ‘teleport’ a quantum gate

quantum gate

Yale University researchers have demonstrated one of the key steps in building the architecture for modular quantum computers: the "teleportation" of a quantum gate between two qubits, on demand.The findings appear online Sept. 5 in the journal Nature.The key principle behind this new work is quantum teleportation, a unique feature

Quantum computer simulates two types of bizarre materials

Scientists have used a quantum computer to conduct large-scale simulations of two types of quantum materials. These studies involved about 2,000 quantum bits, or qubits — many more than the tens of qubits available in most quantum computers.The results, published in two recent studies in Science and Nature, provide a