How is the fidelity between the shared state (rho_{AB}) and the maximally entangled state (|Phi^+rangle) used to determine the security of the BB84 protocol?
The fidelity between the shared state and the maximally entangled state is a critical metric in determining the security of the BB84 protocol, a cornerstone of quantum key distribution (QKD). To understand this relationship, it is essential to consider the fundamentals of quantum cryptography, the principles underlying the BB84 protocol, and the role of entanglement
- Published in Cybersecurity, EITC/IS/QCF Quantum Cryptography Fundamentals, Security of Quantum Key Distribution, Security of BB84, Examination review
How does bootstrapping help verify the statistical uncertainty of the fidelity estimate in the context of the quantum supremacy experiment?
In the context of the quantum supremacy experiment, bootstrapping is a powerful statistical technique used to estimate the uncertainty of the fidelity measure, which is important for validating the experiment's results. Quantum supremacy refers to the point at which a quantum computer can perform a calculation that is infeasible for classical computers to execute in
What is cross-entropy benchmarking, and how is it used to evaluate the performance of quantum gates on the Sycamore processor?
Cross-entropy benchmarking (XEB) is a critical technique employed to evaluate the performance of quantum gates, particularly on quantum processors such as Google's Sycamore processor. This benchmarking method is instrumental in the field of quantum computing, where it serves as a robust tool to measure how well a quantum processor can perform complex quantum operations, which
How do Alice and Bob estimate the information Eve has on the state in entanglement-based protocols?
In entanglement-based quantum key distribution (QKD) protocols, Alice and Bob aim to establish a secure communication channel by exploiting the principles of quantum mechanics. However, they must also consider the potential presence of an eavesdropper, Eve, who may try to gain information about the state of the qubits being transmitted. To estimate the information Eve
How does the distance between state vectors relate to the probability of distinguishing them in a quantum computation?
In the field of quantum computation, the distance between state vectors plays a important role in determining the probability of distinguishing them. To understand this relationship, it is important to consider the fundamental principles of quantum information and complexity theory. Quantum computation relies on the use of quantum bits, or qubits, which can exist in