Phys.org September 22, 2021 Based on light-matter coupling, an international team of researchers (Russia, Switzerland, Germany, UK) created an optical switch which in a proof-of-principle demonstration achieved switching with just one photon at room temperature. The switch could act as a component that links devices by shuttling data between them in the form of optical signals, and serve as an amplifier, boosting the intensity of an incoming laser beam by a factor of up to 23,000. The device relies on two lasers to set its state to “0” or “1” and to switch between them. The switching occurs inside a […]
Tag Archives: Computation technology
Harnessing socially-distant molecular interactions for future computing
Nanowerk February 15, 2021 Researchers in Australia studied the electronic properties of magnesium phthalocyanine (MgPc) sprinkled on a metal surface and demonstrated that the quantum mechanical properties of electrons within the molecules (energy and spatial distribution) are significantly affected by the presence of neighbouring molecules. This effect was observed for intermolecular separation distances of several nanometres. Quantitative analysis of the experimental results and theoretical modelling showed that this interaction was due to mixing between the quantum mechanical orbitals of neighbouring molecules. The molecular orbital mixing leads to significant changes in electron energies and electron distribution symmetries. The long range of […]
New approach for controlling qubits via microwave pulses reduces error rates and increases efficiency
Phys.org January 10, 2020 Microwave trapped-ion quantum logic gates avoid spontaneous emission as a fundamental source of decoherence. However, microwave two-qubit gates are still slower than laser-induced gates and hence more sensitive to fluctuations and noise of the motional mode frequency. In order to reduce error rates even further and provide reliable operations much faster researchers in Germany have developed a method where ions are trapped under vacuum by using electric fields above a chip structure. Qubit operations are implemented by sending microwave signals through special conductor loops embedded in the chip structure. Using microwave fields has the advantage that […]