论文标题
测量在量子计算机上准备的等级2混合状态的纠缠
Measuring entanglement of a rank-2 mixed state prepared on a quantum computer
论文作者
论文摘要
我们研究了在量子计算机上制备的等级2混合状态中某个量子和其余系统之间的纠缠。我们为此目的提出的协议是基于纠缠与量子位之间相关性的几何措施的关系。作为一种特殊情况，我们考虑了两分等级2的混合状态，并找到同意与纠缠的几何措施的关系。在IBMQ-Melbourne量子计算机上，我们测量了由SchrödingerCat状态组成的2和4克混合量子状态的几何纠缠量。我们研究了纠缠的价值对定义纯状态重量的参数的依赖性。最后，我们确定了2 Quibit混合状态的同意。
We study the entanglement between a certain qubit and the remaining system in rank- 2 mixed states prepared on the quantum computer. The protocol, which we propose for this purpose, is based on the relation of geometric measure of entanglement with correlations between qubits. As a special case, we consider a two-qubit rank-2 mixed state and find the relation of concurrence with the geometric measure of entanglement. On the ibmq-melbourne quantum computer we measure the geometric measure of entanglement in the cases of 2- and 4-qubit mixed quantum states which consist of Schrödinger cat states. We study the dependence of the value of entanglement on the parameter which defines the weight of pure states. Finally, we determine the concurrence of 2-qubit mixed state.
