Coherently-controlled two-dimensional spectroscopy: Evidence for phase induced long-lived memory effects
Bibliographic record
Abstract
Using low-intensity phase-shaped excitation pulses we used two-dimensional (2D) electronic spectroscopy to follow the time dependence of the coherent correlations imposed on a solvated organic dye (Rhodamine 101 in methanol) at room temperature. Shaping of the excitation pulses strongly affects both the real and imaginary parts of the 2D-spectra, especially at small waiting times. In particular, the periodic phase modulation of the excitation pulses appears as a two-dimensional grid-like modulation in the correlation spectrum corresponding to the waiting time T = 0. By increasing the waiting time, this modulation quickly disappears in omega(t) space. However, it is still present in w, space even at very long waiting times (> or = 80 ps) where the inhomogeneous broadening is significantly reduced, and reaches its stationary value of approximately 16%. The resonant nature of this induced modulation at long waiting time allows us to conclude that phase shaping of the excitation induces a long-lived memory in solvated organic dyes that is associated with coherent population transfer.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".