QIPC News

Entangled electrons do the splits

Daniele Binosi — Fri, 16 Oct 2009 15:06:05 +0100

The device, which is based on a superconducting �Y� junction, should pave the way for tests of the so-called non-locality of quantum mechanics in the solid state.

Full story available here.

Scheme removes entropy from ultracold atoms

Daniele Binosi — Fri, 02 Oct 2009 14:39:43 +0100

Resulting low-entropy gas could be the ideal system for investigating quantum phenomena that can only exist in highly ordered environments.

Full story available here.

Tricolour entanglement could connect qubits

Daniele Binosi — Fri, 25 Sep 2009 11:38:33 +0100

Physicists in Brazil have added another capability to the quantum computing toolkit by being the first to show that light beams of three different wavelengths can be entangled.

Full news available here

Full Program of Quantum to Cosmos Lectures now Available

Lukas Theussl — Mon, 07 Sep 2009 09:16:56 +0100

The program for the Quantum to Cosmos Festival, coming to you October 15-25, is available at http://www.q2cfestival.com/program.

Ultracold trios tell us more about Efimov states

Daniele Binosi — Fri, 31 Jul 2009 09:21:55 +0100

Massimo Inguscio and colleagues at the University of Florence have made the first Efimov trimers that contain two different species of atoms. A separate team led by Inguscio has also made the first measurement of the energy spectrum of a trimer comprising three identical atoms.

Full story available at physicsworld.com

Quantiki Video Abstracts

Lukas Theussl — Fri, 24 Jul 2009 09:53:54 +0100

The collection is on-line on the Quantiki site.

Ultracold atom takes a quantum walk

Daniele Binosi — Fri, 10 Jul 2009 15:12:32 +0100

Single atoms have been spotted doing the quantum version of the random walk by physicists in Germany. This sighting of a �quantum walk� could help in the design of quantum search algorithms, or in the understanding of the transition from the quantum, microscopic world to the classical, macroscopic world.

Full story available here.

Ultra cold atoms help share quantum information

Daniele Binosi — Fri, 05 Jun 2009 09:39:17 +0100

Scientists in the US have demonstrated a novel "light-switch" in an optical fibre that could become a new tool in the communications industry. The device created by Michal Bajcsy at Harvard University and colleagues could be developed to share both classical and quantum information.

Full story available here.

Chip targets cold atoms

Daniele Binosi — Fri, 22 May 2009 08:58:31 +0100

A new method to trap atoms on a chip has been developed by researchers in the UK. The technique involves capturing cold atoms directly from a room temperature gas of rubidium � and could lead to the development of �atom chips� that can deliver just one atom or photon at a time.

Full story here

Is a room-temperature, solid-state quantum computer mere fantasy?

Daniele Binosi — Wed, 20 May 2009 09:38:28 +0100

Creating a practical solid-state quantum computer is seriously hard. Getting such a computer to operate at room temperature is even more challenging. Is such a quantum computer possible at all? If so, which schemes might have a chance of success?

Reads some possible answers at APS Physics website

Mott insulator stores light

Daniele Binosi — Fri, 15 May 2009 09:21:59 +0100

Immanuel Bloch group and physicists from Israel�s Weizmann Institute of Science and Harvard University, have stored pulses of light in a cloud of ultracold atoms for up to 240 ms � about 40 times longer than the previous record. They did this by arranging the atoms into a lattice-like structure in which the atoms are prevented from moving around. This state, known as a Mott insulator, can then re-emit the pulses on command.

Full story available at physicsworld.com

Are you a hill-climber or a valley-crossing type of scientist?

Daniele Binosi — Thu, 02 Apr 2009 10:07:44 +0100

The publish-or-perish ethic too often favours a narrow and conservative approach to scientific innovation. Mark Buchanan asks whether we are pushing revolutionary ideas to the margins. Read this very interesting essay at physicsworld

Do you have an eye for entanglement?

Daniele Binosi — Fri, 27 Feb 2009 08:11:13 +0100

Physicists in Switzerland and the UK leaded by QUROPE member N. Gisin, have proposed a way of using human vision to observe the purely quantum effect of "entanglement".

Full news available here

Atoms teleport information over long distance

Daniele Binosi — Fri, 23 Jan 2009 07:45:03 +0100

Chris Monroe group teleported quantum information between two atoms separated by a significant distance, for the first time. Until now this feat had only been achieved between photons, and between two nearby atoms through the intermediary action of a third. This advance could be a significant milestone in the quest for a workable quantum computer.

Full news available here

Experiment verifies Nobel-winning theory

Daniele Binosi — Fri, 19 Dec 2008 13:00:28 +0100

Marco Bellini and colleagues from the University of Florence have shown that if one photon is removed from a beam of coherent laser light, the light remains in the same coherent state

Full story available here

Lamb shift spotted in solid qubit

Daniele Binosi — Fri, 12 Dec 2008 09:14:40 +0100

Andreas Wallraff and colleagues at ETH Zurich in Switzerland and the University of Sherbrooke in Quebec have spotted the Lamb shift in the energy levels of a qubit called a �transmon�, which is made from two tiny pieces of superconductor connected by two tunnel junctions (Science 322 1357)

Full news available here

Physicists set new entanglement record

Daniele Binosi — Fri, 17 Oct 2008 08:56:23 +0100

Researchers in China and Europe have entangled a record-breaking 10 quantum bits � an important breakthrough in the quest to develop practical quantum computers.
Full story available @ physicsworld.com

Quantum gas of ultracold polar molecules is a first

Daniele Binosi — Fri, 19 Sep 2008 09:17:59 +0100

The first stable quantum gas of molecules with large electric dipole moments has been made by physicists in the US.

See the full news at PhysicsWorld

Quantum repeater demonstrated

Daniele Binosi — Fri, 29 Aug 2008 09:36:01 +0100

An international team of physicists has taken an important step on the road to global quantum communication by demonstrating the basic principle of a quantum repeater. The breakthrough, which marks the first time that two atom clouds have been entangled remotely, could someday be used to counteract decay in quantum signals. Full story available at physicsworld.com; also have a look at the following press release.

Enigma variations

Lukas Theussl — Mon, 28 Jul 2008 12:51:43 +0100

The latest issue of the Economist runs an article on Quantum Cryptography. Read the full story.

Multi-particle entanglement in solid is a first

Daniele Binosi — Fri, 06 Jun 2008 09:03:09 +0100

An international team of physicists has entangled three diamond nuclei for the first time. The development promotes solid-state systems to a rank of quantum systems including ions and photons that have achieved entanglement for more than two particles.
Full news available here

Spin states endure in quantum dot

Daniele Binosi — Fri, 30 May 2008 09:02:48 +0100

Physicists in the UK and Brazil have taken an important step towards the creation of quantum dots with sufficiently robust spin states. Go, read the full story here.

IBM Cooks Up Replacement For NAND, Hard Drives

Daniele Binosi — Tue, 06 May 2008 09:47:24 +0100

Read the full story at Daily Tech

Prototype gravitational-wave detector uses squeezed light

Daniele Binosi — Tue, 06 May 2008 09:50:56 +0100

Full story available following this link

A quantum leap in computing power

Lukas Theussl — Tue, 22 Apr 2008 14:20:26 +0100

Read the whole article here.

Quantum logic gate is miniaturized

Daniele Binosi — Fri, 28 Mar 2008 09:31:17 +0100

Read the full story at physicsworld.

Entangled photons could sharpen your view

Daniele Binosi — Fri, 28 Mar 2008 09:44:23 +0100

Read the full story at physicsworld or the original article by Seth Lloyd arXiv:0803.2022

Information May Leak from Black Holes at Dial-Up Speeds

Daniele Binosi — Mon, 17 Mar 2008 14:03:23 +0100

Read the full news at SCIAM website

Pattern recognition on a quantum computer

Lukas Theussl — Fri, 07 Mar 2008 10:13:06 +0100

Read the whole story at arstechnica.com

Quantum logic clock

Lukas Theussl — Fri, 07 Mar 2008 10:14:58 +0100

Read the whole story at nist.gov

Entangled memory is a first

Lukas Theussl — Fri, 07 Mar 2008 10:16:27 +0100

Physicists in the US are the first to store two entangled quantum states in a memory device and then retrieve the states with their entanglement intact. Read more at physicsworld.com.

Quantum Teleporting, Yes; the Rest Is Movie Magic

Lukas Theussl — Mon, 11 Feb 2008 10:29:40 +0100

A new movie "Jumper" is about to come out in which the hero can "quantum teleport" himself. The New York Times have an amusing article about a discussion evening that confronted the movies' director and star with quantum physicists at MIT. Enjoy!

More on D-Wave

Daniele Binosi — Thu, 07 Feb 2008 12:12:43 +0100

Scott Aaronson's blog is a must for all of you that are interested in the D-Wave Adiabatic Quantum Computer saga (well let's say is a must for QIPC people and full stop.) On the 29th of January Geordie Rose President and CEO of D-Wave Systems Inc. has been visiting MIT. Read what happened here

D-Wave bags $17m more in funding

Lukas Theussl — Wed, 06 Feb 2008 14:02:29 +0100

Quantum Teleportation and Memory in Tandem

Lukas Theussl — Wed, 06 Feb 2008 14:04:31 +0100

Quantum of Solace

Lukas Theussl — Wed, 06 Feb 2008 14:47:03 +0100

Read more about the announcement of the new James Bond movie at Yahoo News.

Berry�s phase seen in solid-state qubit

Daniele Binosi — Fri, 23 Nov 2007 09:45:44 +0100

Full story available @ physicsworld.com

Single spins controlled by an electric field

Daniele Binosi — Fri, 09 Nov 2007 09:59:01 +0100

Read the full story at phsycsworld.com

Two is a crowd for quantum particles

Daniele Binosi — Fri, 09 Nov 2007 10:00:59 +0100

Read the full story at phsycsworld.com

A faster way to better quantum computers

Lukas Theussl — Fri, 05 Oct 2007 08:53:20 +0100

Read the whole story at physicsworld.com.

Microchip �bus� links up quantum bits

Lukas Theussl — Fri, 28 Sep 2007 09:12:53 +0100

Read the whole story at physicsworld.com.

Single-photon microwave source fits on a chip

Lukas Theussl — Fri, 21 Sep 2007 09:07:17 +0100

Read the whole story at physicsworld.com.

Single-atom entanglement goes further

Daniele Binosi — Fri, 14 Sep 2007 17:08:28 +0100

Read the full story here and the Nature abstract here

New optical microcavity could lead to more efficient quantum computing

Daniele Binosi — Fri, 14 Sep 2007 17:12:26 +0100

Read the full story here

Single-photon transistor plans unveiled

Lukas Theussl — Fri, 07 Sep 2007 14:53:06 +0100

Read the whole story at physicsworld.com.

Light collapses step-by-step

Lukas Theussl — Fri, 24 Aug 2007 09:59:19 +0100

Read the full story at physicsworld.com.

Quantum leap in communications

Jarek Miszczak — Thu, 28 Jun 2007 11:32:53 +0100

A recent discovery by the European Space Agency (ESA) is set to revolutionize the world of communications through the ingenious application of a quantum phenomenon known as entanglement. Read more at European Research Headlines.

Single atom entangles two photons

Lukas Theussl — Fri, 22 Jun 2007 06:31:50 +0100

Read the whole story at physicsweb.org.

Demonstration of superconducting controlled-NOT

Jarek Miszczak — Wed, 20 Jun 2007 10:25:03 +0100

Scientists at the TU Delft made new step towards the quantum computer by demonstrating �controlled-NOT� calculation with two qubits using superconducting rings. For more information see press release from TU DElft and the article in Nature.

Quantum well fires single electrons on demand

Lukas Theussl — Fri, 01 Jun 2007 10:27:47 +0100

Read the whole story at physicsweb.org.

Entanglement dies a sudden death

Lukas Theussl — Fri, 04 May 2007 06:54:11 +0100

Read the whole story at physicsweb.org.

Quantum cryptography is hacked

Daniele Binosi — Wed, 02 May 2007 11:44:30 +0100

Read the full story at news@nature.com.

Optical lattices could give insight into QCD

Daniele Binosi — Wed, 02 May 2007 11:46:38 +0100

Full story at physicsweb.org

Quantum physics says goodbye to reality

Lukas Theussl — Mon, 23 Apr 2007 10:41:05 +0100

Read the story at physicsweb.org.

Photosynthesis takes a leaf out of the quantum book

Lukas Theussl — Mon, 16 Apr 2007 08:39:44 +0100

Physicists in the US have shown that electrons involved in photosynthesis reactions "sample" different energy-level routes in much the same way quantum-computer algorithms can -- at least in theory -- quickly search through unsorted databases.

Read more at physicsweb.org and lbl.gov.

Single-Photon Server Created From an Atom

Daniele Binosi — Wed, 21 Mar 2007 14:45:36 +0100

A team lead by Prof. G. Rempe have succeeded in turning a rubidium atom into a single-photon server, which could allow scientists to generate high-quality photons with consistent energy levels for use in quantum computing.
The full news can be read following this link.

Physicists watch the 'birth, life and death of a photon'

Lukas Theussl — Thu, 15 Mar 2007 08:33:22 +0100

Physicists in France are the first to watch single photons appear spontaneously, live a brief life, and then vanish into thin air. Read the whole story at physicsweb.org.

Quantum cryptography goes wireless

Daniele Binosi — Mon, 12 Mar 2007 11:35:37 +0100

QUROPE scientist Prof. A. Zeilinger and his team have successfully transmitted a secure quantum key between two of the Canary Islands (photons travelled 144 km through the air.)
Nature news report.

Toshiba Plug Loophole in Security of Quantum Cryptography

Jarek Miszczak — Wed, 21 Feb 2007 08:52:49 +0100

Toshiba Research announced that it has developed two new technologies to realize "unconditionally secure" quantum key distribution and overcome a potential security loophole in current commercial QKD systems. Read more.

Scientists dubious of quantum computer claims

Jarek Miszczak — Fri, 16 Feb 2007 08:11:44 +0100

Independent quantum computing researchers said they are dubious of some of the claims made by D-Wave Systems Inc because the company has not yet submitted its findings for peer review. Read more at CNN.com and physicsweb.org.

World's First Commercial Quantum Computer Demonstrated

Jarek Miszczak — Wed, 14 Feb 2007 15:11:51 +0100

The world's first commercially viable quantum computer was unveiled and demonstrated today in Silicon Valley by D-Wave Systems, Inc., a privately-held Canadian firm headquartered near Vancouver. Read the press release from D-Wave Systems.

Quantum Computer running today?

Daniele Binosi — Tue, 13 Feb 2007 09:48:57 +0100

It has appeared in rose.blog a news regarding the demo of a Quantum Computer called Orion. The Orion system is a hardware accelerator designed to solve a particular NP-complete problem called the two dimensional Ising model in a magnetic field.

At the moment one cannot judge if it is a genuine QC or "just a" supraconducting system running "classical" stimulated annealing, but I guess we soon know.

More comments on the news by Andrew Steane and Seth Lloyd are also available here and here.

Bubbles compute in logical devices

Lukas Theussl — Fri, 09 Feb 2007 09:34:07 +0100

Logic gates that use tiny bubbles moving in a fluid have been created at MIT. Read the whole story at physicsweb.org.

Storing light here -- and retrieving it there

Lukas Theussl — Thu, 08 Feb 2007 09:05:13 +0100

Macroscopic particles can be quantum mechanically indistinguishable even though they are physically separate. Read the whole story at physicsweb.org.

The SECOQC White Paper on QKD

Daniele Binosi — Wed, 07 Feb 2007 16:00:13 +0100

The latest version (5.1) of the SECOQC White Paper on QKD which discusses the "added value of QKD to classical cryptography" can be found here: http://www.secoqc.net/downloads/secoqc_crypto_wp.pdf

Can Neutrons be Used in Quantum Computers?

Lukas Theussl — Thu, 18 Jan 2007 13:44:24 +0100

Read the story at PhysOrg.com.

Senetas and ID Quantique claim gigabit quantum encryption

Lukas Theussl — Thu, 18 Jan 2007 13:48:08 +0100

Read the story at EETtimes.com.

Photonic Schroedinger cat breaks record

Lukas Theussl — Thu, 18 Jan 2007 13:49:38 +0100

Read the story at PhysicsWeb.

Quantum Cryptography, It's Some Kind of MagiQ

Jarek Miszczak — Fri, 15 Dec 2006 13:16:31 +0100

Read the interview with Bob Gelfond, founder of quantum cryptography pioneer MagiQ Technologies posted at HackReport.net.

United States patent for superconducting quantum device

Jarek Miszczak — Mon, 11 Dec 2006 08:23:15 +0100

This US patent from NEC and Riken contains description of superconducting charge quantum bit device which performs CNOT operation. Read full text (PDF)

TU Delft shines light on atomic transistor

Jarek Miszczak — Fri, 01 Dec 2006 14:39:25 +0100

This research offers new insights into the behaviour of so-called dopant atoms in silicon. The researchers are able to measure and manipulate a single dopant atom in a realistic semi-conducting environment. The individual behaviour of dopant atoms is a stumbling block to the further miniaturisation of electronics. The researchers have published their findings in the Physical Review Letters. Read more

Simulator for developing quantum computers

Jarek Miszczak — Wed, 29 Nov 2006 09:02:26 +0100

Scientists from Imperial College have proven theoretically a novel way to build a simulator that can recreate the way atoms and particles behave in a quantum system. The proposed simulator is unique because it could let researchers control how individual particles move and interact with each other. Read more at Imperial College website

A Quantum (Computer) Step

Lukas Theussl — Wed, 22 Nov 2006 13:34:36 +0100

A University of Utah study shows it's feasible to read data stored as nuclear 'spins'. Read the whole story here.

Novel Atom Refining Boosts Entanglement of Atom Pairs

Lukas Theussl — Fri, 17 Nov 2006 09:24:17 +0100

Physicists at the National Institute of Standards and Technology (NIST) have demonstrated a method for "refining" entangled atom pairs (a process called purification) so they can be more useful in quantum computers and communications systems.
Read the full story at NIST TechBeat.

Spin measured without destruction

Lukas Theussl — Mon, 13 Nov 2006 09:20:18 +0100

The spin state of a single electron in a quantum dot has been measured for the first time without destroying the state. Read the full story at PhysicsWeb.

NIST demos quantum atom entanglement

Lukas Theussl — Wed, 08 Nov 2006 15:58:28 +0100

The National Institute of Standards and Technology (NIST) has demonstrated error-free quantum communication by pairs of entangled atoms. Whole story

Quantum attacks worry computer scientists

Lukas Theussl — Wed, 08 Nov 2006 16:00:50 +0100

Read the story at SecurityFocus.

Fermion Superfluidity in an Optical Lattice

Lukas Theussl — Wed, 25 Oct 2006 12:00:46 +0100

Read the whole story at Physics News Update.

Elements 116 and 118 discovered

Lukas Theussl — Fri, 20 Oct 2006 11:30:34 +0100

Elements 116 and 118 have been discovered at Lawrence Berkeley Lab. Read the whole story at Physics News Update.

Scientists teleport two different objects

Lukas Theussl — Wed, 04 Oct 2006 00:00:00 +0100

Read this CNN featured article entitled Scientists teleport two different objects.