Measurement of tunneling time via electron interferometry

After many decades, our understanding of the tunneling time across a barrier at the theoretical and experimental levels remains unsatisfactory and subject to debate. We describe an electron interference experiment by which the tunneling time across a symmetric potential barrier can be obtained from the phase shift introduced by the barrier to the interference pattern. We compare these phase shifts as predicted by three competing views of the tunneling time.

[1]  Iñigo L. Egusquiza,et al.  Time in quantum mechanics , 2002 .

[2]  E. H. Hauge,et al.  Tunneling times: a critical review , 1989 .

[3]  D. Sokolovski,et al.  Semiclassical traversal time analysis of superluminal tunneling , 2000 .

[4]  Sala,et al.  Systematic approach to define and classify quantum transmission and reflection times. , 1994, Physical review. A, Atomic, molecular, and optical physics.

[5]  J. C. Martínez,et al.  Transit and Reflection Times for a Non-Symmetric Barrier and a Symmetric Double Barrier , 2003 .

[6]  P. Ghose.  Testing Quantum Mechanics on New Ground , 1999 .

[7]  L. Sanche,et al.  Absolute and effective cross-sections for low-energy electron-scattering processes within condensed matter , 1998, Radiation and environmental biophysics.

[8]  P. Laporta,et al.  Superluminal optical pulse propagation at 1.5 microm in periodic fiber Bragg gratings. , 2001, Physical review. E, Statistical, nonlinear, and soft matter physics.

[9]  Rubenstein,et al.  Optics and interferometry with Na2 molecules. , 1995, Physical review letters.

[10]  L. A. Maccoll.  Note on the Transmission and Reflection of Wave Packets by Potential Barriers , 1932 .

[11]  H. Winful.  Nature of "superluminal" barrier tunneling. , 2003, Physical review letters.

[12]  Rolf Landauer,et al.  Barrier interaction time in tunneling , 1994 .

[13]  R. J. Oakes.  Magnetic Shielding by Superconducting Films , 1962 .

[14]  F. Smith,et al.  Lifetime Matrix in Collision Theory , 1960 .

[15]  Tsuyoshi Matsuda,et al.  Demonstration of single‐electron buildup of an interference pattern , 1989 .