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13 papers · 2 filters
Breakdown of the coherent state path integral: two simple examples
Justin H. Wilson, Victor Galitski
We show how the time-continuous coherent state path integral breaks down for both the single-site Bose-Hubbard model and the spin path integral. Specifically, when the Hamiltonian…
Sharp phase transitions in a small frustrated network of trapped ion spins
G. -D. Lin, C. Monroe, L. -M. Duan
Sharp quantum phase transitions typically require a large system with many particles. Here we show that for a frustrated fully-connected Ising spin network represented by trapped a…
Fast and robust quantum computation with ionic Wigner crystals
J. D. Baltrusch, A. Negretti, J. M. Taylor +1
We present a detailed analysis of the modulated-carrier quantum phase gate implemented with Wigner crystals of ions confined in Penning traps. We elaborate on a recent scheme, prop…
The Accuracy of Perturbative Master Equations
Chris H. Fleming, Nick I. Cummings
We consider open quantum systems with dynamics described by master equations that have perturbative expansions in the system-environment interaction. We show that, contrary to intu…
Quantum Computing
Thaddeus D. Ladd, Fedor Jelezko, Raymond Laflamme +3
Quantum mechanics---the theory describing the fundamental workings of nature---is famously counterintuitive: it predicts that a particle can be in two places at the same time, and…
Interferometry with Synthetic Gauge Fields
Brandon M. Anderson, Jacob M. Taylor, Victor M. Galitski
We propose a compact atom interferometry scheme for measuring weak, time-dependent accelerations. Our proposal uses an ensemble of dilute trapped bosons with two internal states th…