IEEE Spectrum September 13, 2019 The University of Maryland has announced the launch of the Quantum Technology Center which aims to translate quantum physics research into innovative technologies. The center will pursue collaborations with industry and government labs to help take promising quantum advances from the lab to the marketplace. It will also train students in the development and application of quantum technologies to produce a workforce educated in quantum-related engineering. UMD already hosts more than 200 researchers in quantum science, one of the greatest concentrations in the world. Much of the effort has been led by the Joint Quantum […]
Tag Archives: Quantum technology
Researchers demonstrate three-dimensional quantum hall effect for the first time
Eurekalert August 15, 2019 The possibility of generalizing the Quantum Hall Effect (QHE ) to 3D electronic systems was proposed decades ago. Now an international team of researchers (China, USA – Brookhaven National Laboratory, Florida State University, MIT, Singapore) reports the experimental realization of the 3D QHE in bulk zirconium pentatelluride (ZrTe5) crystals. When they cooled the material to very low temperature while under a moderate magnetic field, its longitudinal resistivity drops to zero, indicating that the material transforms from a metal to an insulator. Using this unique material, the electrons can move through the surfaces, giving a Hall resistivity. […]
Scientists discover new state of matter
Phys.org August 15, 2019 A team of researchers in the US (New York University, Wayne State University, SUNY Buffalo) have shown the experimental evidence for a topological superconductivity. They analyzed a transition of quantum state from its conventional state to a new topological state, measuring the energy barrier between these states focusing on majorana particles. Majorana particles have the potential to store quantum information in a special computation space where quantum information is protected from the environment noise. As there is no natural host material for these particles the new form of matter provides a platform on which these calculations […]
World’s first link layer protocol brings quantum internet closer to a reality
Phys.org August 20, 2019 Researchers in the Netherlands have developed a link layer protocol they identified for use in fundamental and technological design considerations of quantum network hardware. They illustrated it by considering the state-of-the-art quantum processor platform, Nitrogen-Vacancy (NV) centers in diamond. They examined the robustness and performance of the protocol. They implemented the protocol and successfully validated the physical simulation model against data gathered from the NV hardware. The protocol is robust. They studied the performance of the protocols for 169 distinct simulation scenarios and initiated the study of quantum network scheduling strategies to optimize protocol performance for […]
Quantum teleportation moves into the third dimension
Physics World August 7, 2019 All demonstrations of teleportation to date were limited to a two-dimensional subspace−so-called qubit−of the quantized multiple levels of the quantum systems. In general, a quantum particle can naturally possess not only multiple degrees of freedom, but also, many degrees of freedom can have high quantum number beyond the simplified two-level subspace. Making use of multiport beam-splitters and ancillary single photons, an international team of researchers (China, Austria) propose a resource-efficient and extendable scheme for teleportation of arbitrarily high-dimensional photonic quantum states. Experimentally they have demonstrated teleportation of a qutrit, which is equivalent to a spin-1 […]
Physicists count sound particles with quantum microphone
Phys.org July 27, 2019 Researchers at Stanford University built a hybrid platform that integrates nanomechanical piezoelectric resonators with a microwave superconducting qubit on the same chip. They excited the phonons with resonant pulses and probed the resulting excitation spectrum of the qubit to observe phonon-number-dependent frequency shifts that are about five times larger than the qubit linewidth. The result demonstrated a fully integrated platform for quantum acoustics that combines large couplings, considerable coherence times and excellent control over the mechanical mode structure. With modest experimental improvements, the approach could enable quantum nondemolition measurements of phonons and will lead to quantum […]
Travelling towards a quantum internet at light speed
Science Daily July 29, 2019 An international team of researchers (Japan, Germany) used laser light to send quantum information to a quantum dot by altering the spin state of a single electron trapped there. While electrons don’t spin in the usual sense, they do have angular momentum, which can be flipped when absorbing circularly polarized laser light. They were able to monitor the inter-dot charge tunneling which only occur when the photo-electron spin in one QD is anti-parallel to the electron spin in the other. The transfer of superposition states or entangled states allows for completely secure quantum key distribution […]
Researchers build transistor-like gate for quantum information processing — with qudits
EurekAlert July 16, 2019 A team of researchers in the US (Purdue University, Oak Ridge National Laboratory) implemented qudit gate with a set of standard off-the-shelf equipment used daily in the optical communication industry. Qudits exist in multiple states, such as 0 and 1 and 2. More states mean that more data can be encoded and processed. They achieved more entanglement with fewer photons by encoding one qudit in the time domain and the other in the frequency domain of each of the two photons. They built a gate using the two qudits encoded in each photon, for a total […]
Nanocrystal ‘factory’ could revolutionize quantum dot manufacturing
Phys.org March 15, 2019 Researchers at North Carolina State University have developed a microfluidic system (called NC Factory) which starts with cesium lead bromide perovskite quantum dots and introduced various halide salts to precisely tune their fluorescence color across the entire spectrum of visible light. Anions in these salts replace the bromine atoms in the green-emitting dots with either iodine atoms (to move toward the red end of the spectrum) or chlorine atoms (to move toward blue). Coupled with continuous process monitoring, the system can precisely control both chemical composition and processing parameters. It can be used to continuously manufacture […]
Long-distance quantum information exchange—success at the nanoscale
Phys.org March 15, 2019 An international team of researchers (Denmark, Australia, USA – Purdue University) discovered that by placing a large, elongated quantum dot between the left dots and right dots, it can mediate a coherent swap of spin states, within a billionth of a second, without ever moving electrons out of their dots. In other words, we now have both fast interaction and the necessary space for the pulsed gate electrodes. The research may have profound implications for the architecture of solid-state quantum computers allowing the realization of networks in which the increased qubit-qubit connectivity translated into a significantly […]