When will Two Agents Agree on a Quantum Measurement Outcome? Intersubjective Agreement in QBism.

In the QBist approach to quantum mechanics, a measurement is an action an agent takes on the world external to herself. A measurement device is an extension of the agent and both measurement outcomes and their probabilities are personal to the agent. According to QBism, nothing in the quantum formalism implies that the quantum state assignments of two agents or their respective measurement outcomes need to be mutually consistent.

Title V of the Older Americans Act, the Senior Community Service Employment Program: participant demographics and service to racially/ethnically diverse populations.

Title V of the Older Americans Act, the Senior Community Service Employment Program (SCSEP), is a 40+-year-old federal program providing subsidized community service and employment training to low-income, unemployed individuals aged 55 and older. It is the only nationally mandated workforce training program for seniors. Because of SCSEP's dual mission, participants added 48 million hours of community service (valued at almost $1 billion) to the U.

Finite de Finetti theorem for infinite-dimensional systems.

We formulate and prove a de Finetti representation theorem for finitely exchangeable states of a quantum system consisting of k infinite-dimensional subsystems. The theorem is valid for states that can be written as the partial trace of a pure state |Psi/Psi| chosen from a family of subsets {Cn} of the full symmetric subspace for n subsystems. We show that such states become arbitrarily close to mixtures of pure power states as n increases.

Decoherence and linear entropy increase in the quantum baker's map.

We show that the coarse-grained quantum baker's map exhibits a linear entropy increase at an asymptotic rate given by the Kolmogorov-Sinai entropy of the classical chaotic baker's map. The starting point of our analysis is a symbolic representation of the map on a string of N qubits, i.e.