Decoherence control by quantum decoherence itself

Abstract

We propose a general approach of protecting a two-level system against decoherence via quantum engineering of non-classical multiple superpositions of coherent states in a non-Markovian reservoir. The scheme surprisingly only uses the system-environment interaction responsible for the decoherence and projective measurements of the two-level system. We demonstrate the method on the example of an excitonic qubit in self-assembled semiconductor quantum dots coupled to super-Ohmic reservoir of acoustic phonons.

5 pages and 1 figure of the main text + 3 pages and 1 figure of the supplement

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Cited by in corpus (13)

• A scheme for direct detection of qubit-environment entanglement generated during qubit pure dephasing
• Steady-state coherences by composite system-bath interactions
• Unconditional preparation of squeezed vacuum from Rabi interactions
• Entanglement generation between a charge qubit and its bosonic environment during pure dephasing - dependence on environment size
• Transfer and teleportation of system-environment entanglement
• Detection of entanglement during pure dephasing evolutions for systems and environments of any size
• Experimental quantum decoherence control by dark states of the environment
• Preferred basis derived from eigenstate thermalization hypothesis
• Theory on electron-phonon spin dehphasing in GaAs multi-electron double quantum dots
• Inducing nontrivial qubit coherence through a controlled dispersive environment
• A signature of quantumness in pure decoherence control
• Protecting quantum systems from decoherence with unitary operations
• Photonic quantum information with time-bins: Principles and applications