Researchers have discovered a new mechanism in magnetic compounds that couples multiple topological bands. The coupling can significantly enhance the effects of quantum phenomena. Read More Quantum Computers News — ScienceDaily
npj Quantum Information, Published online: 01 June 2021; doi:10.1038/s41534-021-00409-y Implementation of quantum imaginary-time evolution method on NISQ devices by introducing nonlocal approximation
Scientists have developed a new understanding of how electrons behave in strong magnetic fields. Their results explain measurements of electric currents in three-dimensional materials that signal a quantum Hall effect – a phenomenon thus far […]
The quantum simulation of quantum chemistry shows promise with a novel two-step low-rank factorization method that substantially reduces gate complexity of Hamiltonian and unitary Coupled Cluster Trotter steps, enabling practical implementation on near-term quantum devices with linear connectivity, as demonstrated by a 50-qubit molecular simulation requiring only 4,000 layers of two-qubit gates.
The researchers developed a multi-pixel spectrally resolved detector system that can simultaneously measure multiple parameters of optical frequency combs (mean energy, central frequency, and spectral bandwidth) in a single shot, achieving and even surpassing the standard quantum limit by utilizing quantum frequency combs with multiple squeezed states.
A new study finds a unique form of tunable and ultrastrong spin-spin interactions in orthoferrites under a strong magnetic field. The discovery has implications for quantum simulation and sensing.
This research advances quantum computing by developing and mathematically proving the effectiveness of multi-exponential error extrapolation techniques, while demonstrating how to efficiently combine it with quasi-probability and symmetry verification methods to achieve superior error mitigation in NISQ devices without requiring quantum error correction’s large qubit overhead.
npj Quantum Information, Published online: 25 May 2021; doi:10.1038/s41534-021-00415-0 Quantum nonlocality without entanglement: explicit dependence on prior probabilities of nonorthogonal mirror-symmetric states
npj Quantum Information, Published online: 25 May 2021; doi:10.1038/s41534-021-00420-3 Parallel quantum simulation of large systems on small NISQ computers
npj Quantum Information, Published online: 24 May 2021; doi:10.1038/s41534-021-00417-y Quantum Zeno effects across a parity-time symmetry breaking transition in atomic momentum space
npj Quantum Information, Published online: 21 May 2021; doi:10.1038/s41534-021-00410-5 Optimal provable robustness of quantum classification via quantum hypothesis testing
Fermions can either exist as individual particles, like electrons, protons, and neutrons, or as so-called quasiparticles. The latter are composed of many components, but behave like a single fermion particle. What characterises fermions is that […]
Entanglement is one of the most important properties of quantum particles and a core resource of many emerging quantum technologies. However, its leverage as a resource is limited as entanglement is a fragile phenomenon that […]
npj Quantum Information, Published online: 20 May 2021; doi:10.1038/s41534-021-00418-x Intensity modulator for secure, stable, and high-performance decoy-state quantum key distribution
npj Quantum Information, Published online: 19 May 2021; doi:10.1038/s41534-021-00412-3 Entanglement-assisted capacity regions and protocol designs for quantum multiple-access channels
Scientists have developed an algorithm to train computers to analyze signals from subatomic particles embedded in advanced electronic materials.
Two research breakthroughs are poised to accelerate the development of synthetic diamond-based quantum technology.
Equal1 Laboratories (Equal1), a silicon-based quantum computing company, has announced the company is the first to demonstrate a fully integrated Quantum Processor Unit (QPU) operating at 3.7 kelvin ― a major milestone with implications for the […]
A Lawrence Berkeley National Laboratory-led international team of researchers has discovered a way to use ion beams to create long strings of “color center” qubits in diamond. Creating large numbers of high-quality qubits, in close […]
Researchers at Tampere University Photonics Laboratory have demonstrated how two interfering photons can bunch into various shapes. These complex shapes are beneficial for quantum technologies, such as performing fast photonic quantum computations and safe data […]
In collaborative international effort, laser physicists at LMU have built the first hybrid plasma accelerator
Researchers at KTH Royal Institute of Technology in Sweden developed integrated chips that can generate light particles on demand and without the need for extreme refrigeration. In order for photons to deliver qubits on-demand in […]
New experiments provide evidence for a decades-old theory that, in the quantum regime, an electron behaves as if it is made of two particles: one particle that carries its negative charge and the other that […]
A black hole permanently scrambles information that can’t be recovered with any quantum machine learning algorithm, shedding new light on the classic Hayden-Preskill thought experiment.
QuTech has resolved a major issue on the road towards a working large-scale quantum computer. QuTech, together with Intel, has designed and fabricated an integrated circuit that can operate at extremely low temperatures when controlling […]