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Multi-level quantum description of decoherence in superconducting qubits
Guido Burkard, Roger H. Koch, David P. DiVincenzo
We present a multi-level quantum theory of decoherence for a general circuit realization of a superconducting qubit. Using electrical network graph theory, we derive a Hamiltonian…
Exact Born Approximation for the Spin-Boson Model
Daniel Loss, David P. DiVincenzo
Within the lowest-order Born approximation, we present an exact calculation of the time dynamics of the spin-boson model in the Ohmic regime. We observe non-Markovian effects at ze…
Locking classical correlation in quantum states
David DiVincenzo, Michal Horodecki, Debbie Leung +2
We show that there exist bipartite quantum states which contain large hidden classical correlation that can be unlocked by a disproportionately small amount of classical communicat…