Quantum memories based on engineered dissipation
arXiv:1010.2901 · doi:10.1103/PhysRevA.83.012304
Abstract
Storing quantum information for long times without disruptions is a major requirement for most quantum information technologies. A very appealing approach is to use self-correcting Hamiltonians, i.e. tailoring local interactions among the qubits such that when the system is weakly coupled to a cold bath the thermalization process takes a long time. Here we propose an alternative but more powerful approach in which the coupling to a bath is engineered, so that dissipation protects the encoded qubit against more general kinds of errors. We show that the method can be implemented locally in four dimensional lattice geometries by means of a toric code, and propose a simple 2D set-up for proof of principle experiments.
6 +8 pages, 4 figures, Includes minor corrections updated references and aknowledgements
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- On the optimal feedback control of linear quantum systems in the presence of thermal noise
- Passive correction of quantum logical errors in a driven, dissipative system: a blueprint for an analog quantum code fabric
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- Rapid mixing and stability of quantum dissipative systems
- Engineered Open Systems and Quantum Simulations with Atoms and Ions
- Suppression of ac Stark shift scattering rate due to non-Markovian behavior
- A Perturbative Approach to Continuous-Time Quantum Error Correction
- Using quantum state protection via dissipation in a quantum-dot molecule to solve the Deutsch problem
- Diffusive lossless energy and coherence transfer by noisy coupling