Operator Quantum Zeno Effect: Protecting Quantum Information with Noisy Two-Qubit Interactions

Abstract

The time evolution of some quantum states can be slowed down or even stopped under frequent measurements. This is the usual quantum Zeno effect. Here, we report an operator quantum Zeno effect, in which the evolution of some physical observables is slowed down through measurements even though the quantum state changes randomly with time. Based on the operator quantum Zeno effect, we show how we can protect quantum information from decoherence with two-qubit measurements, realizable with noisy two-qubit interactions.

accepted by Phys. Rev. Lett

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• Experimental protection against evolution of states in a subspace via a super-Zeno scheme on an NMR quantum information processor
• Quantum Zeno Effect of General Quantum Operations
• The quantum Zeno and anti-Zeno effects: from weak to strong system-environment coupling
• Quantum computation with noisy operations
• Protection of entanglement between two two-level atoms
• Bound State Internal Interactions as a Mechanism for Exponential Decay
• Entanglement Protection of Classically Driven Qubits in a Lossy Cavity
• Impact of independent reservoirs on the quantum Zeno and anti-Zeno effects
• The quantum Zeno and anti-Zeno effects with non-selective measurements
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• Finite-size scalings in measurement-induced dynamical phase transition