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Tunneling Time and Weak Measurement in Strong Field Ionization.

Tomáš Zimmermann1,2, Siddhartha Mishra1, Brent R Doran3

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|June 25, 2016
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Tunneling delays in strong field ionization are clarified by linking definitions to experimental observables. This research suggests tunneling is not instantaneous, impacting attosecond science interpretations.

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Area of Science:

  • Quantum mechanics
  • Strong field physics
  • Attosecond science

Background:

  • Tunneling delays are debated with conflicting definitions.
  • Lack of consensus on physical observables for tunneling time.

Purpose of the Study:

  • Relate different tunneling time definitions to distinct experimental observables.
  • Investigate the physical meaning of tunneling time in strong field ionization.

Main Methods:

  • Connecting tunneling time definitions (Larmor, Bohmian) to experimental observables (attoclock, resonance lifetime).
  • Utilizing weak measurement theory and its connection to experimental observables.
  • Analyzing discrepancies between Bohmian and weak measurement values in strong field ionization.

Main Results:

  • Larmor time aligns with the attoclock observable.
  • Bohmian time corresponds to the resonance lifetime of a bound state.
  • Significant discrepancy found between Bohmian and weak measurement tunneling times in strong field ionization, attributed to postselection.

Conclusions:

  • Tunneling time definitions are linked to specific experimental observables.
  • Tunneling is unlikely to be an instantaneous process.
  • Findings have implications for interpreting attosecond science experiments.