RealFeedApp Four copies yield a nonzero certificate
Using five copies of unknown three-qubit states increases the optimal success probability for certification from τ²/48 to 5τ²/72 while retaining the original state. At six copies, the certification probability reaches (39+2S)τ²/296.
- Field
- hardware and chips
- What they did
- Researchers developed a method to measure the state of three qubits using four copies of the original state to obtain an entanglement certificate, while a fifth copy increases the success probability and allows the original unknown state to be retained.
- Why it matters
- This is crucial for quantum computing, as retaining an unknown state after measurement is essential for further operations, and increasing the success probability makes the process more reliable.
#quantum computing#entanglement#three-qubit#state retention#certification
