Phys.org February 2, 2023 An international team of researchers (UK, Italy) has reported the experimental realization of the prime number quantum potential VN(x), defined as the potential entering the single-particle Schrödinger Hamiltonian with eigenvalues given by the first N prime numbers. Using computer-generated holography, they created light intensity profiles suitable to optically trap ultracold atoms in these potentials for different N values. As a further application, they implemented a potential whose spectrum is given by the lucky numbers, a sequence of integers generated by a different sieve than the familiar Eratosthenes’s sieve used for the primes. According to the researchers their results pave the way […]
Tag Archives: Quantum systems
Direct printing of nanodiamonds at the quantum level
Nanowerk May 4, 2022 The quantum defects in nanodiamonds, such as nitrogen-vacancy (NV) centers, are emerging as promising candidates for nanoscale sensing and imaging, and the controlled placement with respect to target locations is vital to their practical applications. Researchers in Hong Kong have developed on-demand electrohydrodynamic printing of nanodiamonds containing NV centers with high precision control over quantity and position. After thorough characterizations of the printing conditions, they showed that the number of printed nanodiamonds can be controlled at will, attaining the single-particle level precision. This printing approach enables positioning NV center arrays with a controlled number directly on […]
Quantum systems learn joint computing
EurekAlert February 24,2021 An international team of researchers (Germany, Spain) succeeded in connecting two qubit modules across a 60-meter distance in such a way that they effectively form a basic quantum computer with two qubits. They performed a quantum computing operation between two independent qubit setups in different laboratories. To generate entanglement between qubits for quantum computations they employed modules consisting of a single atom as a qubit that is positioned amidst two mirrors. Between these modules, they sent a photon, that is transported in the optical fiber. This photon is then entangled with the quantum states of the qubits […]
Quantum systems learn joint computing
Phy.org February 5, 2021 The big challenge in quantum computing is to realize scalable multi-qubit systems with cross-talk–free addressability and efficient coupling of arbitrarily selected qubits. Quantum networks promise a solution by integrating smaller qubit modules to a larger computing cluster. Such a distributed architecture, however, requires the capability to execute quantum-logic gates between distant qubits. An international team of researchers (Germany, Spain) experimentally realized such a gate over 60 meters. They employed an ancillary photon that they successively reflected from two remote qubit modules, followed by a heralding photon detection, which triggers a final qubit rotation. They used the […]
In a new quantum simulator, light behaves like a magnet
Phys.org March 19, 2019 An international team of researchers (Switzerland, France, Japan) proposes a new “quantum simulator”, a photonic device that can be built and run with current experimental techniques. It may be built using superconducting coupled to laser fields in such a way that it causes an effective interaction among photons. It can simulate the complex behavior of real, interacting magnets at very low temperatures. They found that the photons behaved in the same way as magnetic dipoles across the quantum phase transition in real materials. The Using the new technique photons can be used to run a virtual […]
Sound waves let quantum systems ‘talk’ to one another
Phys.org February 18, 2019 Transferring information between different types of technology, such as quantum memories and quantum processors has been a persistent challenge. To couple the sound waves with the spins of electrons in the material an international team of researchers (University of Chicago, UC Santa Barbara, Argonne National Laboratory, Japan) built a system with curved electrodes to concentrate the sound waves, like using a magnifying lens to focus a point of light. Using the synchrotron they observed inside the material as the sound waves moved through it. The research reveals the importance of shear strain for future device engineering […]
One step closer to complex quantum teleportation
Science Daily November 2, 2018 Researchers in Austria are pursuing a new path to increase the information capacity of complex quantum systems – instead of just increasing the number of particles involved, the complexity of each system is increased. By using a computer algorithm Melvin that autonomously searches for an experimental implementation, they entangled three photons beyond the conventional two-dimensional nature using quantum systems which have more than two possible states — in this particular case, the angular momentum of individual light particles. The individual photons now have a higher information capacity than QuBits. The developed methods and technologies could […]