Principle proposed by CQT's Stephanie Wehner and Corsin Pfister rules out various alternative theories of nature, including the possibility that state space is discrete.

Experiments described in Nature and Physical Review Letters demonstrate the 'non-adiabatic holonomic quantum gates' recently proposed by CQT theorists and their collaborators.

Researchers in Singapore and the UK propose a scheme to strengthen an error-correcting toric topological code.

CQT researchers show that a violation of the quantum uncertainty principle implies a violation of the second law of thermodynamics.

Singapore's debut in the global event will feature a local challenge from CQT PI Alexander Ling.

CQT researchers and their collaborators propose simulation of a relativistic quantum field theory that has resisted full mathematical solution since the 1950s.

Martin Kiffner is recognised by the American Physical Society for services to peer review.

Papers presented at the prestigious ACM-SIAM SODA conference tackle a search problem and the complexity of creating shared quantum states.

Team of 13 Principal Investigators led by Valerio Scarani to receive five-year grant from Singapore's Ministry of Education.

Joseph Fitzsimons and Troy Lee will each receive a research grant of up to S$3 million as recipients of the prestigious fellowship.

We are pleased to announce the results of the Centre for Quantum Technologies / New Scientist Quantum shorts film competition.

Hear the latest from our ion trappers, learn why CQT is spending a million dollars on a fridge and understand how Singapore has become the world capital for direct product theorems. All this and more in our 2012 Annual Report...

Computer scientists and experimentalists collaborate to implement a communication protocol for parties who don't trust each other.

Evon Tan is named CQTian of the Year and Troy Lee is chosen as the Centre’s top performer.

Ten quantum-inspired films will face an international jury and public vote.

The Centre for Quantum Technologies is five today. What have we achieved?

CQT researchers and collaborators have written a comprehensive review of measures of quantum correlations for Reviews of Modern Physics.

CQT's Outreach Fellow Karol Jalochowski reports on his progress.

The peaks should be a distinctive marker of the important but not well-understood phenomenon of Anderson localisation, predict CQT researchers and their collaborators.

Researchers including Artur Ekert, co-inventor of quantum cryptography, discover new power in the secret messaging technique.

CQT researchers and their collaborators present in Nature Physics a 'hidden influence inequality' that exposes how quantum predictions challenge our understanding of spacetime.

A preview from CQT's annual report for 2012, for which Serge Haroche contributed these reflections on his research and life beyond physics.

Article by Principal Investigator Vlatko Vedral exploring the past and future of thermodynamics is featured on the magazine's cover.

CQT congratulates Dave Wineland, a member of the Centre's advisory board, and Serge Haroche on their well-deserved award.

In pinning down the down the properties of ¹³⁷Ba⁺, the Mictrotraps group demonstrates skills for precision measurements and quantum computing experiments.

CQT PI Alexander Ling and his collaborators were invited to write about the group’s work on quantum optics for launch into space.

CQT's Stephanie Wehner and co-authors are first to look at the quantum analogue of classical randomness extractors.

Different reasoning leads CQT research teams to differing predictions for the lifetime of a quantum state implicated in birds' magnetic sense.

The second annual conference on quantum cryptography was hosted by CQT in Singapore, 10-14 September 2012.

Karol Jalochowski will be working on a documentary series about 'the most challenging puzzles of reality', as seen through a quantum lens.

Artur Ekert has co-authored with Oxford physicist David Deutsch an article looking “Beyond the Quantum Horizon”.

Six distinguished scientists spend a week at CQT for their annual review of the Centre's research direction.

CQT theorists contributed to a pair of papers in Nature Physics that put discord to the test.

The team has found a "direct product theorem for bounded-round public-coin randomized communication complexity" and will present the result at a prestigious conference.

Nelly, who has joined CQT as a research assistant after a successful undergraduate project, wins two prizes from Singapore's Nanyang Technological University.

Competition with New Scientist as media partner seeks short films inspired by quantum physics.

Arun is first from the now more than 50-strong PhD student cohort at CQT to collect his degree.

Events at the physics-focused meeting featured CQT Director Artur Ekert, Principal Investigator Alexander Ling and CQT PhD student Colin Teo.

Four CQTians - including student Colin Teo, selected as a bright young researcher - will join Singapore President Tony Tan Keng Yam at the prestigious event in Germany.

DPM Teo Chee Hean was accompanied on his visit to the National University of Singapore by the Permanent Secretary (National Research and Development) and other VIPs.

Photon-entangling technology that CQT team proposes to launch on a satellite performs well in weather-balloon test.

CQT congratulates Lai Choy Heng on his appointment as Executive Vice President (Academic affairs) for pioneering liberal arts college.

Paper by CQT researchers and their collaborators in Nature Communications highlights differences in computational power of different quantum phases.

Congratulations to Rahul on winning an NUS Young Researcher Award 2012.

A trio of papers arising from research initiated at CQT show how to harness spontaneous emission for good.

A month-long art/science collaboration at CQT has ended with the installation of a "Cabinet of Curiosities" on the Centre's sixth floor.

Researchers from Singapore and Spain have designed circuit QED schemes to take advantage of the 'ultrastrong coupling regime'. The results are published in Physical Review Letters.

CQT researchers and their collaborators report in Nature Communications that quantum mechanics can reduce the complexity of classical models.

Supported by the 2012 NUS Arts/Science Residency programme, Grit Ruhland will spend a month at CQT working on a "Cabinet of Curiosities".

In the New Journal of Physics, CQT's Dimitris G. Angelakis and his group members describe a technique for quantum simulation of neutrino oscillations.

CQT researchers and their collaborators propose in the Biophysical Journal a new quantum biology mechanism for European robins' magnetic sense

Serge Haroche gave the six-part lecture series "Quantum information with real or artificial atoms and photons in cavities" in February.

Two-day meeting encourages Singapore's standing as a hot spot for research in physics.

CQT's Rahul Jain and his collaborator publish in IEEE Transactions on Information Theory intuitive proofs of a widely-applied theorem.

Talk and exhibition stand at annual meeting of the American Association for the Advancement of Science in Vancouver, Canada, capture international attention.

CQT Director Artur Ekert profiled in Singapore's TODAY newspaper.

Idea invented by CQT's Joe Fitzsimons and colleagues implemented in the lab.

CQT-organised workshop drew researchers from around the world to discuss the significance of 'discord' as a measure of quantumness.

Arun to be first graduate of the PhD@CQT programme established in 2008.

CQT proudly supports the journalist and film-maker in producing documentaries about quantum physics.

International team demonstrates approach that could test for quantum superpositions in macroscopic objects.

CQT and Oxford researcher calculates lengthened lifetimes for quantum memories using toric codes in the presence of imperfections.

Award recognises exceptional contributions to making CQT a welcoming and vibrant place.

We are pleased to make available the Centre's Annual Report for 2011. Download the pdf here.

Around 50 researchers participated in the workshop on quantum state and process estimation.

Dagomir describes his team's novel approach to a foundational quantum problem: how the classical world emerges from the quantum.

Oxford and CQT researchers measure quantum effects in the macroscopic world.

Address to NUS highlights the two institute's commitment to work together on quantum research.

Researchers from Singapore and Oxford calculate that an 'amplifier' spin system could enhance the sensitivity of magnetic sensors thousandfold.

Research association between CQT, the French public research organisation CNRS and six French research institutions will facilitate collaboration.

CQT's Christian Kurtsiefer and Valerio Scarani appear in "Ciphercrime", a feature about hacking quantum cryptography systems.

Experiment by CQT researchers and their collaborators shows why quantum physicists should always read the fine print.

George Musser, staff editor and writer for Scientific American, has received an American Institute of Physics communication award.

Investment in S$600,000 frequency comb brings new optical precision to CQT’s experimental labs.

CQT's Esther Hänggi and colleagues show that it may be possible to rule out the idea that faster-than-light communication could explain results interpreted as quantum.

Congratulations to Masahito Hayashi on receiving the 2011 IEEE Information Theory Paper Award.

Congratulations to Kuldip Singh on receiving the Commendation Medal in Singapore’s National Day Awards 2011.

Paper proposes scheme to certify that entangling devices of the sort required for quantum teleportation behave as they should.

Congratulations to Le Phuc Thinh on winning an NUS Outstanding Undergraduate Researcher Prize.

The quantum world allows you to answer questions correctly when you don't even have all the information you should need, CQT and UC Berkeley researchers find.

CQT staff take hands-on science to opening event of the Singapore Science Festival

CQT researchers have three papers accepted for major conference FOCS 2011.

CQT researchers and their collaborators assess a qubit design that could offer a million-fold improvement in lifetime over the current experimental best.

Researchers in Singapore and Norway implemented an eavesdropper exploiting a loophole, since closed, in secure communications technology.

Artists Linda Sim and Dario Lombardi spend their residency at CQT developing an art installation inspired by ideas in physics.

CQT's Vlatko Vedral and Oscar Dahlsten, with colleagues from ETH Zurich, define the thermodynamic meaning of negative entropy.

The magazine's June cover story is by CQT's Vlatko Vedral.

Scientific American article "The strangest numbers in string theory" co-authored with John Huerta.

Researchers propose that photons can simulate a long-sought quantum effect.

CQT Director interviewed on science radio show The Red Shift.

CQT researcher Valerio Scarani publishes a news article and new paper on the 'tripartite no-signaling polytope'.

Markus is second CQT researcher to be honoured by the American Physical Society.

Theorists from Singapore and Spain collaborate on work that explores the relationship between non-locality and quantum entanglement.

Researchers' calculations show that a robin's magnetic compass may preserve quantum states for longer than achieved in the lab.

Singapore hosted the 14th Workshop on Quantum Information Processing in January 2011.

Paper by CQT researchers in recent top ten list for quantum computing from ScienceWatch.com

CQT researchers Stephen Clark and Dieter Jaksch have helped to uncover the ultra-fast quantum dynamics of electrons in a room-temperature material.

Read about our research achievements and activities in this year's annual report, available to download as a PDF.

Principal Investigator Stephanie Wehner co-authors paper in Science showing that the uncertainty principle determines the non-locality of quantum mechanics.

How might category theory be useful in quantum physics? A profile of CQT Visiting Research Professor John Baez on the website of the Foundational Questions Institute explains.

Principal Investigator Valerio Scarani and two students from NUS High School of Math & Science celebrate the publication of their textbook, Six Quantum Pieces.

The elegant coffee table book presents essays from 65 quantum scientists set among black and white photographs.

The weekly Polish-language news magazine Polityka features CQT in an article by science journalist Karol Jalochowski.

X-periment! is a three-day science carnival organised by A*STAR & Science Centre Singapore that celebrates the latest developments and research works in the field of science and technology.

Official partnership between CQT and IQC, University of Waterloo featured by Waterloo Chronicle and TheRecord.com

Centre for Quantum Technologies (CQT), a Research Centre of Excellence in National University of Singapore, has been recognized as a Laureate by the Computerworld Honors Program.

A recent publication of Kean Loon, Benoit, Han Rui, Berge and Christian M has been highlighted by the American Physical Society in "Physics" among the hits of the week

Tomasz Paterek, Dagomir Kaszliskowski, Valerio Scarani and Andreas Winter from CQT, together with co-workers of the University of Gdansk (Poland), propose a new physical principle called "information causality" in a paper published in Nature.

All you wanted to know in quantum cryptography has now been reviewed for you by Valerio Scarani of CQT and his co-authors, in a publication in Reviews of Modern Physics.

Computational Complexity Theory studies how difficult it is to solve a problem, or how hard it is to verify that a proposed solution is indeed correct. The degree of difficulty depends of course on the resources one can use: in particular, quantum physics being more general than classical physics, one might expect the use of quantum resources to help.

Mile Gu's recent work on complexity and emergence catches attention of editors of Nature.

New Journal of Physics, one of the highest impact factor journals for physics and quantum information, has devoted a special issue to quantum cryptography. Four out of the twenty selected articles have been authored by the CQT Quantum Optics Group.

When atoms are cooled down to a temperature very close to absolute zero, they tend to "bunch" together in a peculiar way predicted by Bose and Einstein in the 1920s.

How do migrating birds manage to travel from Northern Europe to Africa and back? It's quantum physics, stupid!

Take a laser (not a very powerful one, but still, emitting more light than a standard pointer) and shine the light on a single atom. Do you expect to see any effect?

A team from the quantum optics group recently took their quantum key distribution system quite literally into the "wilderness". It started with an invitation from our friends at NIST to do a joint exhibition of QKD systems at the two largest computer security (a.k.a. hackers) conferences in the world: Black Hat (for the corporate types) and DEFCON (for the alternative version) in Las Vegas.

The team of Prof Christian Kurtsiefer, Prof Valerio Scarani and Prof Antia Lamas-Linares have been awarded the 2008 National Science Award.

You wouldn't trust a device sold by your enemy to establish a secret code with your friends, would you? And yet, you should - if the device is suitably based on quantum physics.

The possibility of using quantum physics for secret communication has been noticed more than 20 years ago. "Quantum cryptography" has since been implemented, first in physics laboratories (including NUS), then in the first commercial devices.

Quantum physics offers a bizarre view of reality that is observer dependent and multifaceted. Read more about it in the Straits Times as explained by one of our PIs using card games and magical tricks.

Alex Ling , a graduate student at CQT, was recently asked to give a talk about his work in quantum cryptography at the Googleplex. Alex was in California attending Photonics West (a scientific/technical conference) presenting recent work on device independent quantum cryptography.

According to quantum theory, two quantum objects can be "entangled" in a way that only joint properties are sharply defined, while the individual properties of each object are lost. For instance, two "quantum arrows" (spins) can be such that they surely point in opposite directions (sharp joint property) but no arrow points in a definite direction (individual properties are lost). This is clearly at odds with our everyday experience, in which joint properties appear only as consequences of individual ones.