Molecular approach to quantum computing

Physicists at Caltech have demonstrated the benefits of a lesser-studied approach for quantum computers that relies not on atoms but molecules. if a quantum computer platform uses qubits made of molecules, the researchers say, the […]

A 8.5 GHz Quantum Analyzer by Zurich Instruments

The Swiss company Zurich Instruments has just introduced its SHFQA Quantum Analyzer that operates at up to 8.5 GHz and can thus perform direct readout of superconducting and spin qubits. Conceived as the next generation […]

Cosmic rays may cause decoherence in qubits

Researchers at MIT, MIT Lincoln Laboratory, and Pacific Northwest National Laboratory (PNNL) have found that a qubit’s performance may soon hit a wall because of the low-level, otherwise harmless background radiation that is emitted by trace elements […]

IBM has achieved a Quantum Volume of 64 with 27 qubits

IBM on Thursday announced it’s reached a new quantum computing milestone, hitting its highest Quantum Volume to date. Using a 27-qubit client-deployed system, IBM achieved a Quantum Volume of 64.   Quantum Volume is a metric […]

Scalable quantum computer with superconducting circuits

So far, superconducting quantum computers have certain constraints on qubit connectivity, such as nearest-neighbor couplings. To overcome this limitation, a team of researchers at RIKEN, Japan, has proposed a scalable architecture to simultaneously connect several […]

AI delivers step forward in quantum computing

Researchers at Oxford University, in collaboration with DeepMind, University of Basel and Lancaster University, have created a machine learning algorithm that interfaces with a quantum device and ‘tunes’ it faster than human experts, without any […]

A quantum thermometer to measure the coldest temperatures

Physicists from Trinity College Dublin have proposed a thermometer based on quantum entanglement that can accurately measure temperatures a billion times colder than those in outer space. These ultra-cold temperatures arise in clouds of atoms, […]

US Army announces a 128-qubit prototype project

A research project funded by the U.S. Army has developed a new approach to manufacturing quantum computer chips, representing a significant step forward toward making quantum processors. The research was completed by scientists at the […]

Excitons bound by photon exchange

A team of researchers successfully created the first artificial atom using photons as threads to weave electrons together. In contrast to interband excitons in undoped quantum wells, doped quantum wells do not display sharp resonances […]

Major quantum computational breakthrough

MIP* = RE is not a typo. It is a groundbreaking discovery and the catchy title of a recent paper in the field of quantum complexity theory. Complexity theory is a zoo of “complexity classes” of which MIP*and RE are […]

New benchmarks to optimize quantum computer performance

Computer scientists at UCLA have shown that existing compilers, which tell quantum computers how to use their circuits to execute quantum programs, inhibit the computers’ ability to achieve optimal performance. Specifically, their research has revealed […]

Quantum states 10,000 times longer coherent

A team of scientists at the University of Chicago‘s Pritzker School of Molecular Engineering announced the discovery of a simple modification that allows quantum systems to stay coherent 10,000 times longer than before. Though the scientists tested […]

High fidelity entanglement through a fiber cable

A team of researchers from Heriot-Watt University, the Indian Institute of Technology and the University of Glasgow has demonstrated a way to transport entangled particles through a commercial fiber cable with 84.4% fidelity. The work […]

Quantum researchers create an error-correcting qubit

Yale physicists have developed an error-correcting cat qubit—a new device that combines the Schrödinger’s cat concept of superposition (a physical system existing in two states at once) with the ability to fix some of the […]

First quantum algorithm to characterize noise

Researchers at University of Sydney Nano Institute have developed the first system-wide quantum algorithm to characterize noise. Noise is the main obstacle to building large-scale quantum computers. To tame the noise (interference or instability), scientists […]

Limits on Purifying Quantum States

A new theoretical study identifies fundamental tradeoffs that limit the amount of noise reduction in quantum information systems. Quantum information technology could perform certain tasks faster and more securely than classical methods, but noise is […]

Quantum computing enhanced computational catalysis

The quantum computation of electronic energies can break the curse of dimensionality that plagues many-particle quantum mechanics. It is for this reason that a universal quantum computer has the potential to fundamentally change computational chemistry […]

Using entangled photons to play “quantum Go”

A team of researchers affiliated with several institutions in China has developed a form of the board game Go using entanglement. The researchers created a version of quantum Go using entangled photons and found that […]