Experimental demonstration of a robust, high-fidelity geometric two ion-qubit phase gate Universal logic gates for two quantum bits (qubits) form an essential ingredient of quantum computation. Dynamical gates have been proposed in the context ... D Leibfried,B Demarco,V Meyer,... - 《Nature...
High-fidelity photonic quantum logic gate based on near-optimal Rydberg single-photon source 这是我们组师兄他们的成果,《基于近最优里德堡单光子源的高保真度光量子逻辑门》,近期发表在了Nature Communication上。下面是报道的公众号文章,原文可以上nature查。这应该是目前世界上最好的单光子源和保真度最高的光量...
High-fidelity ion-trap quantum computing with hyperfine clock states We propose the implementation of a geometric-phase gate onmagnetic-field-insensitive qubits with $\\hat{\\sigma}^z$-dependent forces fortrapped ion quantum... L Aolita,K Kim,J Benhelm,... - 《Physical Review A》 被引量...
Single trapped ions are promising systems for quantum nodes, providing a very high level of control over their photonic interaction5,31,32and large coherence times33,34; importantly, single-ion qubits are directly addressable and thus allow quantum information processing via high-fidelity quantum gate...
Gate fidelity and noisy channel spectrum We first provide some preliminaries about quantum channels, the fidelity of implemented noisy gates, and the relationship between the fidelity of a gate and the channel spectrum of its noisy implementation. ...
Embraced with the built-in noise resilience feature for quantum evolutions, holonomic quantum computation provides high fidelity quantum gate operations, and thus has attracted much attention from researchers for stepping forward the development of robust quantum computation. Here in this work, we propose...
decoherence-free subspace. Therefore the dominant source of decoherence — dephasing is highly depressed. The homodyne detection of the coherent state directly measure the relative phase of the signal state, so the photon losses only decrease the fidelity but not lead to a failure of the ...
The quantification of coherence generally uses three functions: \(l_{1}\)-norm coherence, relative entropy, and quantum fidelity [38]. Similar to the frozen coherence process that we will discuss in the future, the general conditions for frozen coherence based on quantum fidelity could be explor...
These error rates have decreased over time, but are still many orders of magnitude larger than what is needed to run high-fidelity algorithms. To reduce error rates further, researchers need to supplement approaches that lower gate error rates at the physical level with other methods such as Q...
Capacitively coupled semiconductor spin qubits hold promise as the building blocks of a scalable quantum computing architecture with long-range coupling between distant qubits. However, the two-qubit gate fidelities achieved in experiments to date have b