Achieving high-fidelity single-qubit gates in a strongly driven charge qubit with 1/f charge noiseA study shows that pulsing techniques can suppress an important source of errors in qubits formed in semiconductor quantum dots. Quantum bits (qubits) are the building block of quantum technologies, ...
Charge qubits formed in double quantum dots represent quintessential two-level systems that enjoy both ease of control and efficient readout. Unfortunately, charge noise can cause rapid decoherence, with typical single-qubit gate fidelities falling below $90\\\%$. Here, we develop analytical methods...
High-fidelity ac gate operations of a three-electron double quantum dot qubit We show theoretically that the threshold fidelity can be achieved with ac gate operation of the quantum dot hybrid qubit. Formed by three electrons in a... CH Wong - 《Physical Review B》 被引量: 2发表: 2016年...
We describe a simple way of characterizing the average fidelity between a unitary (or anti-unitary) operator and a general operation on a single qubit, which only involves calculating the fidelities for a few pure input states, and discuss possible applications to experimental techniques including ...
Two-qubit single-photon quantum logic gates. Characterization of three two-qubit quantum gates on the space of polarization andx-parity:athe identity gate;bthe\(\sqrt {{\rm{CNOT}}} \)gate; andcthe CNOT gate. For each gate, we show the phase implemented on the PS-SLM (Fig.4), and ...
The action of the Hadamard gate on single-qubit |ψ〉 is to perform the following transformation: (3.8)H(a|0〉+b|1〉)=a12(|0〉+|1〉)+b12(|0〉−|1〉)=12[(a+b)|0〉+(a−b)|1〉]. The Hadamard gate therefore interchanges the CB and diagonal basis: |0〉↔|+〉and|1〉...
Minimum assured fidelity and minimum average fidelity in quantum teleportation of single qubit using non-maximally entangled states. Prakash, H., Verma, V.: Minimum assured fidelity and minimum average fidelity in quantum teleportation of single qubit using non-maximally entangled states... H Prakash...
Measuring the state of a qubit is a key fundamental operation of a quantum computer. High-fidelity single-shot readout of superconducting qubits can be achieved using parametric amplifiers at millikelvin temperatures. However, scaling parametric amplifie
By studying the influence of the shape and power of the control pulses, we find evidence that the present limitation to the gate fidelity is mostly related to the external hardware and not the intrinsic behaviour of the qubit. 机译:基于对硅中单个P-31原子的电子和核自旋的相干控制和单次读出...
Optimal control for fast and high-fidelity quantum gates in coupled superconducting flux qubits We apply the quantum optimal control theory based on the Krotov method to implement single-qubit X and Z gates and two-qubit cnot gates for inductively ... SY Huang,HS Goan - 《Phys.rev.a》 被引...