378 citations · 3.4k across the 62 of their papers we have counts for
6 papers · 1 filter
Why protective measurement does not establish the reality of the quantum state
Joshua Combes, Christopher Ferrie, Matthew S. Leifer +1
"Protective measurement" refers to two related schemes for finding the expectation value of an observable without disturbing the state of a quantum system, given a single copy of t…
Fisher-symmetric informationally complete measurements for pure states
Nan Li, Christopher Ferrie, Jonathan A. Gross +2
We introduce a new kind of quantum measurement that is defined to be symmetric in the sense of uniform Fisher information across a set of parameters that injectively represent pure…
On the novelty, efficacy, and significance of weak measurements for quantum tomography
Jonathan A. Gross, Ninnat Dangniam, Christopher Ferrie +1
The use of weak measurements for performing quantum tomography is enjoying increased attention due to several recent proposals. The advertised merits of using weak measurements in…
Cost of postselection in decision theory
Joshua Combes, Christopher Ferrie
Postselection is the process of discarding outcomes from statistical trials that are not the event one desires. Postselection can be useful in many applications where the cost of g…
Minimax quantum tomography: the ultimate bounds on accuracy
Christopher Ferrie, Robin Blume-Kohout
A minimax estimator has the minimum possible error ("risk") in the worst case. We construct the first minimax estimators for quantum state tomography with relative entropy risk. Th…
Near-optimal quantum tomography: estimators and bounds
Richard Kueng, Christopher Ferrie
We give bounds on the average fidelity achievable by any quantum state estimator, which is arguably the most prominently used figure of merit in quantum state tomography. Moreover,…