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Journals and Conferences
A quantum computer can solve hard problems, such as prime factoring, database searching and quantum simulation, at the cost of needing to protect fragile quantum states from error. Quantum error… (More)
Quantum computing becomes viable when a quantum state can be protected from environment-induced error. If quantum bits (qubits) are sufficiently reliable, errors are sparse and quantum error… (More)
Say that a graph has persistent transition if the Ising model on the graph can exhibit a phase transition (nonuniqueness of Gibbs measures) in the presence of a nonzero external eld. We show that for… (More)
By compensating for a phase-based decoherence effect, we produce the brightest high quality source of polarization entangled photons to date: 2.01*10/sup 6/ measured pairs per second.
P. Roushan1,∗ C. Neill2,∗ A. Megrant1,∗ Y. Chen, R. Babbush, R. Barends, B. Campbell, Z. Chen, B. Chiaro, A. Dunsworth, A. Fowler, E. Jeffrey, J. Kelly, E. Lucero, J. Mutus, P. J.J. O’Malley, M.… (More)
Delayed-choice quantum cryptography is a novel protocol, incorporating an optical storage system, which achieves substantially higher effective data rates for quantum key distribution.
We present a fabrication process for fully superconducting interconnects compatible with superconducting qubit technology. These interconnects allow for the 3D integration of quantum circuits without… (More)
Using type-I down-conversion, we extend the boundaries of experimentally accessible two-qubit polarization states. Specifically, we create and characterize maximally entangled mixed states that lie… (More)
Frequency up- and down-conversion in nonlinear crystals enables several fundamental resources for optical quantum information, including on-demand single photons, entangled-photon states, and… (More)
This essay turns to ancient sources in order to rethink the relationship between political apathy and democracy. If modern democratic theorists place political apathy entirely outside of democracy –… (More)