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quantum optics News
Diamond Metalens Could Improve Quantum Device Performance and Scalability
PHILADELPHIA, June 14, 2019 — At the chemical level, diamonds are no more than carbon atoms aligned in a 3D crystal lattice. Even a diamond that looks flawless contains defects that can absorb or emit light. Small defects in diamonds called nitrogen-vacancy (NV) centers hold electron spins that can be manipulated at room temperature. Each NV center emits light that can provide information about the spin’s quantum state. Collecting light from deeply embedded NV centers usually requires a bulky optical
Efficiency of Quantum Memory Gets a Boost
HONG KONG, April 30, 2019 — Quantum memory efficiency, an essential component for quantum computers, is the focus of joint research from the Hong Kong University of Science and Technology (HKUST), South China Normal University (SCNU), and Nanjing University. The research team...
Low-Loss, All-Fiber System Supports Coupling Between Distant Atoms
TOKYO, April 3, 2019 — A team of scientists from Waseda University, the Japan Science and Technology Agency, and the University of Auckland developed an integrated, all-fiber coupled-cavities quantum electrodynamics (QED) system, in which a meter-long portion of...
Particle Cavity Cooling Could Aid Quantum Effects Study
VIENNA, April 2, 2019 — A new method for cooling levitated nanoparticles using optical tweezers, discovered by researchers at the University of Vienna, the Austrian Academy of Sciences, and the Massachusetts Institute of Technology (MIT), could advance scientists’...
Measuring Quantum Back Action Could Improve Sensitivity of Gravitational-Wave Detectors
BATON ROUGE, La., March 26, 2019 — Researchers at Louisiana State University (LSU) have defined a broadband, off-resonance measurement of quantum radiation pressure noise (QRPN) in the audio band, at frequencies relevant to gravitational-wave detectors. The noise spectrum obtained by...
New Approach to Measuring Large-Scale Photonic Correlation at Single-Photon Level
SHANGHAI, March 6, 2019 — A multi-institutional research team has demonstrated a way to map and measure large-scale photonic quantum correlation with single-photon sensitivity. The ability to measure thousands of instances of quantum correlation is critical for making...
Visible-Telecom Entangled Photon Pairs Could Support Quantum Communication
GAITHERSBURG, Md., March 1, 2019 — A photon pair source that can bridge the visible and telecom bands could be useful for transporting quantum communications over optical fibers. However, the optical components that store and process quantum information typically require...
Funding Aims to Improve Global Gravitational Wave Network
SWINDON, England, Feb. 25, 2019 — U.S. and U.K. science funding agencies have earmarked $30 million in additional funding aimed at significantly increasing the sensitivity of gravitational wave observatories around the globe. Improvements to the global gravitational wave network,...
All-Photonic Quantum Repeaters Could Lead to Faster, More Secure Quantum Internet
TORONTO, Jan. 29, 2019 — Researchers at the University of Toronto are working to address the challenges of transmitting quantum information securely over great distances using optical fiber communication. They have developed a prototype for a key element for all-photonic...
Nobel Prize Winner Glauber Dies at 93
NEWTON, Mass., Jan. 1, 2019 — Roy J. Glauber, Nobel laureate, passed away Dec. 26, 2018, at the age of 93. Glauber was awarded one-half of the 2005 Nobel Prize in Physics “for his contribution to the quantum theory of optical coherence.” Glauber’s prize-winning work centered on...
Researchers Achieve Strong Optomechanical Coupling of Light and Sound
LONDON, Dec. 28, 2018 — A strong coupling regime between light and high-frequency acoustic sound waves was demonstrated by a team from Imperial College London, the University of Oxford, and the National Physical Laboratory. The team’s findings could provide a possible...
Using Fiber Optics, ORNL Team Demonstrates Universal Quantum Computing
OAK RIDGE, Tenn., Dec. 10, 2018 — Researchers at Oak Ridge National Laboratory (ORNL) have demonstrated a frequency-based approach to quantum computing. The researchers performed two distinct, independent operations simultaneously on two qubits encoded on photons of different...
Optical Cluster States Could Enable One-Way Quantum Computing
QUEBEC CITY, Canada, Dec. 4, 2018 — Using a compact optical platform, a research team at Institut National De La Recherche Scientifique (INRS) has generated a high-dimensional, d-level cluster state and has used it to perform quantum computing operations. According to the researchers,...
High-Efficiency Tractor Beam Traps Atoms, Could Be Used for Quantum Experiments
ADELAIDE, Australia, Nov. 7, 2018 — University of Adelaide researchers have created a highly efficient waveguide trap for atoms that could be used for experiments in quantum memory. The trap, or tractor beam, is made of IR light that interacts with the atoms to create a change in...
Model Explores the Hallmarks of Quantum Behavior
KRAKOW, Poland, Oct. 15, 2018 — Could the way we categorize nonintuitive phenomena such as quantum interference and quantum entanglement be a result of our cognitive limitations, that is, the ways in which we study the world? Not nature, but our lack of full knowledge about the...
Impurities in Semiconductor Enable Qubits That Emit Photons in IR
GRONINGEN, Netherlands, Oct. 2, 2018 — An international research team has discovered a way to create qubits that emit photons at wavelengths close to those used by telecom providers. Scientists at the University of Groningen, together with colleagues from Linköping University and...
SWAP Gate Could Help in Scaling Quantum Computers
REHOVOT, Israel, Sept. 5, 2018 — The quantum optics lab at the Weizmann Institute of Science has created a logic gate in which a photon and an atom can automatically exchange the information they carry. This advance could help in scaling up quantum computers for practical use....
Team Demonstrates Multiple DOF, Solid-State Quantum Memory
HEFEI, China, Aug. 28, 2018 — A team from the University of Science and Technology of China has developed multi-degree-of-freedom (DOF) multiplexed solid-state quantum memory and has demonstrated photon pulse operation functions with time and frequency DOFs. The researchers...
Single-Photon Source Could Help Secure Quantum Data
SHEFFIELD, England, July 18, 2018 — Researchers have found a way to generate very rapid single-photon light pulses, a discovery that could be used to secure quantum data transfer. Single-photon pulses offer data security, because any attempt to intercept the data can be detected...
Device Offers Quantum-Compatible Link Between Microwave, Optical Domains
BOULDER, Colo., July 18, 2018 — A device that uses a small plate to absorb microwave energy and bounce it into laser light could provide a solution for sending quantum signals over long distances. Scientists at JILA, a joint institute of the University of Colorado Boulder and the...
Quantum-Enhanced Plasmonic Sensing Could Improve Biosensing, Chemical Detection
NORMAN, Okla., May 21, 2018 — Researchers used quantum states of light to enhance the sensitivities of plasmonic sensors. Results of the experiment could lead to enhanced ultratrace label-free plasmonic sensing for a range of applications. Plasmonic sensors have been shown to...
Quantum Scarring Theory Could Lead Way to Extended Quantum State
LEEDS, England, May 18, 2018 — An international team of researchers, led by the University of Leeds and in cooperation with the Institute of Science and Technology Austria and the University of Geneva, has provided a theoretical explanation for the unusual behavior of individual...
Newton’s Cradle Yields Insight into Quantum Thermalization
STANFORD, Calif., May 3, 2018 — A quantum version of Newton’s cradle was used to investigate how the chaotic motion of quantum particles eventually leads to thermal equilibrium. With the cradle, researchers observed how, after inducing small amounts of chaotic motion, a...
New Bose-Einstein Condensate Couples Light with Metal Electrons
ESPOO, Finland, April 18, 2018 — Researchers created a new Bose-Einstein condensate, where the condensed particles were mixtures of light and metal electrons (so-called surface plasmon polaritons), in motion in gold nanorods arranged into a periodic array. Unlike most previous...
Researchers Attain Largest Entangled Quantum Register to Date
INNSBRUCK, Austria, April 16, 2018 — A research team at the Institute of Quantum Optics and Quantum Information (IQOQI) in Innsbruck, together with researchers from the University of Ulm and the Institute of Quantum Optics and Quantum Information (Vienna), has achieved controlled...
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