Slowly but surely, researchers seem to be inching toward workable quantum computers. According to IEEE Spectrum, Christopher Monroe and his team at the University of Maryland may have gotten one step closer: they've teleported the quantum state of an ion to another ion a meter (3.3 ft) away.
Quantum teleportation isn't entirely new, but Monroe says his particular approach "will enable the creation of quantum repeaters—still-theoretical devices needed to make large-scale quantum cryptography networks—and will also be useful for making quantum computers." IEEE Spectrum has more:
At the heart of teleportation lies a quantum mechanics effect known as entanglement. That phenomenon allows two particles—such as photons, atoms, or ions—to be linked in such a way that if someone measures the quantum state of one object, the state of the other becomes known as well. Entangled photons are often used in experimental quantum information networks. But while photons are easy to transmit (after all, they move with the highest speed in the universe), they are very difficult to store. On the other hand, atoms and ions preserve entanglement for a long time, but being massive, they are much harder to move from place to place.
The beauty of Monroe's approach to teleportation is that it is an intelligent combination of the strengths of photons and ions. His team used two ytterbium ions confined in electromagnetic ion traps and cooled by lasers. The goal is to teleport the quantum state of one ytterbium ion to the other. Both ions are prepared for entanglement by microwave pulses and then zapped by ultrafast laser pulses. Each ion subsequently gives off a photon, which is entangled with the ion's state. Through a complex series of steps, the system transfers the quantum state of one ytterbium ion to the other.
Although he and his team have only demonstrated teleportation across one meter, Monroe says that in theory, his approach "can be extended to distances as great as thousands of kilometers."
|SilverStone Nitrogon NT08-115XP cooler fits in nearly any case||3|
|Samsung set to disable remaining Galaxy Note 7 handsets||33|
|Deals of the week: laptops and spinning storage||13|
|Qualcomm readies up 48-core Centriq 2400 ARM server chip||54|
|BitFenix Shogun chassis goes for internal and external coolness||3|
|AMD and Intel join forces for a bundle of hardware and games||59|
|Report: Samsung Galaxy S8 may go into full-screen mode||23|
|Gigabyte XK700 keyboard will challenge your limits||22|
|Microsoft and Intel set to bring AR to the people with Project Evo||10|
|The little 1.5-GHz Celeron isn't likely to set anyone's pants on fire with its performance. Not setting pants on fire can be a good thing you know. --...||+43|