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Researchers in the UK have taken a small but important step towards the creation of practical quantum computers by creating the first logic gates on a silicon chip that can process individual photons. The chip, which measures several millimetres across, reproduces an earlier version of the gate that occupied several square metres of space on an optical bench.
A new study hints that black holes might not be as good at keeping secrets as researchers have long thought. Recently [http://www.cs.mcgill.ca/~patrick/ Patrick Hayden] and [http://www.theory.caltech.edu/~preskill/ John Preskill] have reexamined the time it would take for information to potentially escape from inside a black hole.
Slashdot has an article about the withdrawal of an article by Jonathan Oppenheim and co-authors from Physical Review Letters because they had asked for a rights agreement compatible with GFDL which Quantiki uses for its content.
The Canadian Quantum Information Summer School has become an annual Canadian tradition and welcomes students from all over the world. The Eighth installment aims to introduce the participants to quantum algorithms, quantum error correction, quantum information theory and quantum cryptography. They will also receive lectures on implementations, quantum complexity theory, nonlocality and some more recent developments in quantum algorithms, namely quantum walks.
The Summer School is being held at the Université de Montréal in Montreal, Quebec, Canada from June 9 to 13, 2008.
One of the problems plaguing classical communication is associated with what is known as the Byzantine agreement. In this problem, messages between three different parties are subject to faulty information. Quantum communication, though, has held the promise of solving this dilemma. But until now, it has been difficult to do so, even using entangled states.
ERATO-SORST Quantum Computation and Information Project invites applications for post-doctoral positions to conduct theoretical research on quantum computation and information science, including quantum cryptography, quantum algorithm, quantum communication, and other fundamental topics on quantum information, or to conduct experimental research on quantum information with photons. Applicants should have earned a PhD in physics, computer science, information science, mathematics, or a related field, have demonstrated an excellent research accomplishment in quantum information science.
An atomic clock that uses an aluminium atom to apply the logic of computers to the peculiarities of the quantum world now rivals the world's most accurate clock, based on a single mercury atom. Both clocks are at least 10 times more accurate than the current U.S. time standard.
Recently, quantum computing has been heralded as the new cool kid on the block. The point of quantum computing is that, during a calculation, the bits (called qubits) that are being manipulated are never in a definite one or zero state. Instead, they can be thought of as being both a one and a zero simultaneously, which allows a quantum computer to explore many solutions at the same time. The upshot is that, for a limited set of problems, quantum computers may offer a substantial speed up over normal computers.
Researchers have succeeded in building diodes that manipulate heat, which paves the way for thermal transistors and logic. Lei Wang and Baowen Li describe the emerging field of “phononics”.
MagiQ Technologies, Inc., the quantum information processing (QIP) company announced success of their 3 year joint venture program. The Quantum Communications Victoria (QCV) joint venture has produced the world’s first commercial source of single photons (single particles of light), which are a crucial component of quantum communication systems. MagiQ will collaborate in development and will participate in the sales and marketing of these new products.
