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7 papers · 2 filters
High fidelity quantum memory via dynamical decoupling: theory and experiment
Xinhua Peng, Dieter Suter, Daniel A. Lidar
Quantum information processing requires overcoming decoherence---the loss of "quantumness" due to the inevitable interaction between the quantum system and its environment. One app…
Optimized Dynamical Decoupling for Time Dependent Hamiltonians
Stefano Pasini, Götz S. Uhrig
The validity of optimized dynamical decoupling (DD) is extended to analytically time dependent Hamiltonians. As long as an expansion in time is possible the time dependence of the…
Optimized Dynamical Decoupling for Power Law Noise Spectra
S. Pasini, G. S. Uhrig
We analyze the suppression of decoherence by means of dynamical decoupling in the pure-dephasing spin-boson model for baths with power law spectra. The sequence of ideal pulses…
Experimental generation of pseudo bound entanglement
H. Kampermann, X. Peng, D. Bruss +1
We use Nuclear Magnetic Resonance (NMR) to experimentally generate a bound entangled (more precisely: pseudo bound entangled) state, i.e. a quantum state which is non-distillable b…
Efficient Coherent Control by Optimized Sequences of Pulses of Finite Duration
Götz S. Uhrig, Stefano Pasini
Reliable long-time storage of arbitrary quantum states is a key element for quantum information processing. In order to dynamically decouple a spin or quantum bit from a dephasing…
Optimized pulses for the perturbative decoupling of spin and decoherence bath
S. Pasini, P. Karbach, C. Raas +1
In the framework of nuclear magnetic resonance, we consider the general problem of the coherent control of a spin coupled to a bath by means of composite or continuous pulses of du…