3 papers
quant-ph2021
Fault-tolerant logical gates in holographic stabilizer codes are severely restricted
Sam Cree, Kfir Dolev, Vladimir Calvera +1
We evaluate the usefulness of holographic stabilizer codes for practical purposes by studying their allowed sets of fault-tolerantly implementable gates. We treat them as subsystem…
quant-ph2020
A fidelity measure for quantum states based on the matrix geometric mean
Sam Cree, Jamie Sikora
Uhlmann's fidelity function is one of the most widely used similarity measures in quantum theory. One definition of this function is that it is the minimum classical fidelity assoc…
gr-qc2018
Can the fluctuations of the quantum vacuum solve the cosmological constant problem?
Samuel S. Cree, Tamara M. Davis, Timothy C. Ralph +3
The cosmological constant problem arises because the magnitude of vacuum energy density predicted by quantum mechanics is about 120 orders of magnitude larger than the value implie…