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Theoretical Quantum Optics > News

News on Quantum Optics

New ’building material’ points toward quantum computers

02 October 2017

A Danish-American research team has shown that it is possible to produce ‘Majorana particles’ in a new ‘building material’. The research, led by scientists from Niels Bohr institute, paves the road for new types of experiments.

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Smart atomic cloud solves Heisenberg's observation problem

13 July 2017

One of the most fundamental principles of physics, "Quantum Back Action", has been challenged by researchers from the Niels Bohr Institute, which has used laser light to link a vibrating membrane with cesium atoms.

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Iron secrets behind superconductors unlocked

07 July 2017

Due to magnetism iron should - theoretically - be a poor superconductor. Nevertheless certain ironbased materials possess fine superconducting properties. Why? Because the five unbound electrons found in iron...

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Holey pattern boosts coherence of nanomechanical membrane vibrations

12 June 2017

Researchers at the Niels Bohr Institute have introduced a new type of nanomechanical resonator, in which a pattern of holes localizes vibrations to a small region in a 30 nm thick membrane.

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Søren Stobbe awarded the 2017 SCIENCE Business Prize

24 May 2017

38-year-old Associate Professor Søren Stobbe of the University of Copenhagen’s Niels Bohr Institute has been awarded  the 2017 SCIENCE Business Prize by the University of Copenhagen’s Faculty of Science. Søren Stobbe received the award for successfully conducting commercially-oriented research while inspiring his students to do the same. Likewise, 35-year-old Assistant Professor Mads Fiil Hjorth of the Department of Nutrition, Exercise and Sports and 35-year-old Postdoc Svend Roesen Madsen of the Department of Plant and Environmental Sciences received the Business Prize for Young Researchers. They received their awards for conducting research in commercial contexts while inspiring others.  The 2017 SCIENCE Business Prize is worth 75,000 Danish kroner – the largest sum for a UCPH award, while the two business-minded younger researchers shared the second prize, each being awarded 37,500 kroner towards their future work.

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Huge grant to quantum research

19 April 2017

Danish National Research Foundation is willing to donate up to 62 million kroner to a new research centre at the Niels Bohr Institute. The new Centre of Excellence will be named Hybrid Quantum Networks (Hy – Q).

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First step towards photonic quantum network

25 January 2017

First step towards photonic quantum networkResearchers from the Niels Bohr Institute have now developed the first building blocks needed to construct complex quantum photonic circuits for quantum networks. This rapid development in quantum networks

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The Sound of Quantum Vacuum

21 December 2016

Quantum mechanics dictates sensitivity limits in the measurements of displacement, velocity and acceleration. A recent experiment at NBI probes these limits, analyzing how quantum fluctuations set a sensor membrane

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University of Copenhagen partners with Microsoft to develop topological quantum computer

28 November 2016

Professor Charles Marcus will build the world's first topological quantum computer at the Niels Bohr Institute in collaboration with the Technical University of Delft and Sydney University under a Microsoft...

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Effective reflection of light for quantum technology

23 September 2016

Effective reflection of light for quantum technologyResearchers at the Niels Bohr Institute have developed a new method where they create a very strong interaction between light and atoms, which means that the light can be controlled and reflected on a glass fiber.

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Optical magnetic field sensor can detect signals from the nervous system

15 July 2016

The human body is controlled by electrical impulses in, for example, the brain, the heart and nervous system. These electrical signals create tiny magnetic fields, which can be used to diagnose various diseases. 

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Quantum photonic researchers start new company, Sparrow Quantum

27 May 2016

Researchers in the research group Quantum Photonics at the Niels Bohr Institute have formed a new company, Sparrow Quantum, which will produce photonic chips that could be used for quantum technology based on light.

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Superfast light source made from artificial atom

26 April 2016

New research results from the Niels Bohr Institute show that light sources can be made much faster by using a principle that was predicted theoretically in 1954. Superfast light sources can be used, for example, in laser lights, LED...

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Massive investment: From theoretical quantum physics to usable quantum technology

07 April 2016

In a major new effort to translate quantum physics into practical quantum technology, the Innovation Fund Denmark has therefore invested 80 million kroner in a nationwide project involving three universities.

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Protected Majorana states for quantum information

09 March 2016

Quantum technology has the potential to revolutionize computation, cryptography, and simulation of quantum systems. However: quantum states are fragile, and so must be controlled without being measured. 

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Photons open the gateway for quantum networks

23 October 2015

Photons open the gateway for quantum networksThere is tremendous potential for new information technology based on light (photons), and quantum technology based on photons – called quantum photonics, will be able to hold much more information than current computer technology.

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Quantum networks: Back and forth are not equal distances!

27 July 2015

Quantum networks: Back and forth are not equal distances! Researchers from the Niels Bohr Institute have discovered a new type of photonic channels, where back and forth are not equal distances! Such a system has been a missing component for building quantum photonic circuits on a large

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Super sensitive measurement of magnetic fields in swinging atoms

30 March 2015

Super sensitive measurement of magnetic fieldsThere are electrical signals in the nervous system, the brain and throughout the human body and there are tiny magnetic fields associated with these signals that could be important for medical science.

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Quantum link between QDev in Denmark and QuTech in Holland

17 March 2015

Quantum link between QDev in Denmark and QuTech in HollandThe Center for Quantum Devices, QDev at the Niels Bohr Institute at the University of Copenhagen and QuTech at Delft University of Technology in Holland have therefore entered into an international partnership in the research

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Quantum mechanic frequency filter for atomic clocks

06 March 2015

Quantum mechanic frequency filter for atomic clocks In an atomic clock, electrons jumping from one orbit to another decides the clock’s frequency. To get the electrons to jump, researchers shine light on the atoms using stabilised laser light. However, the laser light has to have a very

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New superconducting hybrid crystals developed at the University of Copenhagen

12 January 2015

New superconducting hybrid crystals developed at the University of Copenhagen  A new type of ‘nanowire’ crystals that fuses semiconducting and metallic materials on the atomic scale could lay the foundation for future semiconducting electronics. Researchers at the University of Copenhagen are behind

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Atoms queue up for quantum computer networks

24 December 2014

Atoms queue up for quantum computer networksIn order to develop future quantum computer networks, it is necessary to hold a known number of atoms. To do this, researchers from NBI have developed a method with a trap that captures the atoms along an ultra thin glass fiber

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Breakthrough in light sources for new quantum technology

29 August 2014

Future quantum circuits are photonic circuits, i.e. circuits based on light (photons) instead of electrons. Now scientists at the Niels Bohr Institute have succeeded in creating a steady stream of photons emitted one at a time and in a

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Ultra sensitive detection of radio waves with lasers

05 March 2014

Ultra sensitive detection of radio waves with lasers When detecting radio waves ‘noise’ in the instrument limits how sensitive and precise the measurements can be. Now researchers at the Niels Bohr Institute have developed a new method where they can avoid noise by means of

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Quantum teleportation between atomic systems over long distances

06 June 2013

The research group Quantum Optics at NBI has succeeded in teleporting information between two clouds of gas atoms and to carry out the teleportation – not just one or a few times, but successfully every single time

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Breaking the limits of classical physics

07 June 2012

Researchers from NBI have made a simple experiment that demonstrates that nature violates common sense. The experiment illustrates that light does not behave according to the principles of classical physics...

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Cooling semiconductor by laser light

22 January 2012

Cooling semiconductor by laser lightResearchers at the NBI have combined two worlds – quantum physics and nano physics, and this has led to the discovery of a new method for laser cooling semiconductor membranes

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Two giant grants from the EU to the Niels Bohr Institute

28 October 2011

Two giant grants from the EU to the Niels Bohr InstituteThe Niels Bohr Institute has received two large research grants totalling 35 million kroner from ERC. The two recipients are Eugene Polzik, professor and head of Quantop and Jan Ambjørn, professor with...

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Quantum optical link sets new time records

17 August 2011

Quantum optical link sets new time records The key component in quantum communication over long distances is entanglement between two atomic systems. Entanglement is very fragile and up until now researchers have only been able to maintain the...

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Quantum memory for communication networks of the future

07 November 2010

Quantum memory for communication networks of the futureResearchers from the Niels Bohr Institute have succeeded in storing quantum information using two 'entangled' light beams. Quantum memory is a necessary element of future quantum communication networks...

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Record measurement of extremely small magnetic fields

12 April 2010

Record measurement of extremely small magnetic fieldsResearchers at the research center QUANTOP at the Niels Bohr Institute at the University of Copenhagen have constructed an atomic magnetometer, which has achieved the highest sensitivity allowed by quantum mechanics.

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