Universal Dynamical Decoupling of a Single Solid-State Spin from a Spin Bath

By G. D. Lange, Zhihui Wang, D. Ristè, V. Dobrovitski, Ronald Hanson. Science, 2010

717 citations recorded by the source corpus.

Avoiding Loss in a Quantum System Single electron spins in solid-state environments have been explored as candidates for quantum information storage and computation; however, they often interact strongly with their surroundings and lose the stored information on the time scale of pico- to milliseconds. Dynamical decoupling schemes have been introduced to “undo” the effects of this interaction by applying a sequence of control pulses that reverse the undesirable evolution of the system. De Lange et al. (p. 60, published online 9 September) tested several decoupling schemes on a nitrogen vacancy center in diamond and found that a scheme with evenly spaced pulses with double-axis decoupling could prolong the coherence time of an arbitrary spin state up to 25-fold. The coherence time of single spins is extended by a sequence of microwave pulses. Controlling the interaction of a single quantum system with its environment is a fundamental challenge in quantum science and technology. We strongly suppressed the coupling of a single spin in diamond with the surrounding spin bath by using double-axis dynamical decoupling. The coherence was preserved for arbitrary quantum states, as verified by quantum process tomography. The resulting coherence time enhancement followed a general scaling with the number of decoupling pulses. No limit was observed for the decoupling action up to 136 pulses, for which the coherence time was enhanced more than 25 times compared to that obtained with spin echo. These results uncover a new regime for experimental quantum science and allow us to overcome a major hurdle for implementing quantum information protocols.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/84e0ff378c8018546144ef877c8e4939ef18ddf4

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Citations in the corpus

A quantum memory intrinsic to single nitrogen-vacancy centres in diamond (2011, methodology): “or compensated using dynamical methods to decouple the spin from its environmen”
Dynamical decoupling and noise spectroscopy with a superconducting flux qubit (2011, methodology): “Several multi-pulse sequences developed within the field of nuclear magnetic resonance [2] (NMR) have recently been applied to mitigate noise in qubits based on atom ic ensembles [11], semiconductor quantum dots [12,13], and diamond nitrogen–vacancy centres [14,15].”
Decoherence of ensembles of nitrogen-vacancy centers in diamond (2020, methodology): “1d) to extract T2([N]) and the stretched exponential parameter p [20, 25].”
Quantum superposition, entanglement, and state teleportation of a microorganism on an electromechanical oscillator (2015, methodology): “be used to increase the coherent time TM by several orders, eventually limited by the relaxation time T1 [59].”
Sensitivity optimization for NV-diamond magnetometry (2019, background): “…the characteristic decay time of the NV- spin state measured through Hahn echo, denoted by T2 (the coherence time), is substantially longer than the inhomogenous dephasing time T ∗2 , typically exceeding the latter by one to two orders of magnitude (Bauch et al., 2019; de Lange et al., 2010).”
Heralded entanglement between solid-state qubits separated by three metres (2012, background): “(b) The coherence of the NV B spin qubit as a function of total free evolution time tFE during an N-pulse dynamical decoupling sequence [23].”