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Dynamical suppression of 1/f noise processes in qubit systems
Lara Faoro, Lorenza Viola
We investigate the capability of dynamical decoupling techniques to reduce decoherence from a realistic environment generating 1/f noise. The predominance of low frequency modes in…
A subsystem-independent generalization of entanglement
Howard Barnum, Emanuel Knill, Gerardo Ortiz +2
We introduce a generalization of entanglement based on the idea that entanglement is relative to a distinguished subspace of observables rather than a distinguished subsystem decom…
A note on verification procedures for quantum noiseless subsystems
Lorenza Viola, Emanuel Knill
We establish conditions under which the experimental verification of quantum error-correcting behavior against a linear set of error operators $\ce$ suffices for the verification o…
Contractive Schroedinger cat states for a free mass
Lorenza Viola, Roberto Onofrio
Contractive states for a free quantum particle were introduced by Yuen [Yuen H P 1983 Phys. Rev. Lett. 51, 719] in an attempt to evade the standard quantum limit for repeated posit…