SpinQ Triangulum: A commercial three-qubit desktop quantum computer

An implementation of the Deutsch-Jozsa algorithm on a three-qubit NMR quantum computer

A new approach to the implementation of a quantum computer by high-resolution nuclear magnetic resonance (NMR) is described. The key feature is that two or more line-selective radio-frequency pulses are applied simultaneously. A three-qubit quantum computer has been investigated using the 400 MHz NMR spectrum of the three coupled protons in 2,3dibromopropanoic acid. It has been employed to impl...

Qubit metrology for building a fault-tolerant quantum computer

Recent progress in quantum information has led to the start of several large national and industrial efforts to build a quantum computer. Researchers are now working to overcome many scientific and technological challenges. The program's biggest obstacle, a potential showstopper for the entire effort, is the need for high-fidelity qubit operations in a scalable architecture. This challenge aris...

Two-qubit gates in a microwave photonic quantum computer

SIMULATION OF n-QUBIT QUANTUM SYSTEMS: A COMPUTER-ALGEBRAIC APPROACH

During the last decade, the ˇeld of quantum computation has attracted a lot of interest and motivated many theoretical and experimental studies of n-qubit quantum systems. But apart from the promise of more efˇcient quantum algorithms, these investigations also revealed a number of obstacles which still have to be overcome in practice. In this context, the use of simulation programs has proved ...

Three-qubit quantum-gate operation in a cavity QED system

A scheme is proposed to obtain three-qubit gates, such as quantum-phase gate and C2-NOT gate operations, in a cavity QED system where highly detuned cavity-field modes interact with a four-level system in an inverted-Y configuration. The influence of the Stark shift is also included in such proposed gate operations. Since only the metastable lower levels are involved in the gate operations, the...