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Electronic coherence signatures can be directly identified in the time-frequency maps measured in 2 dimensional spectroscopy (2DES). We demonstrate the theory and discuss the advantages of this approach by a detailed application to the fast femtosecond beatings of a wide variety of electronic coherences in dimers of size-dispersed (8%) 3nm quantum dots (QDs). The observed and computed results can be consistently characterized directly in the time-frequency domain by probing the polarization in a 2DES set-up. Experimental and computed time-frequency maps are found in very good agreement and several electronic coherences are characterized at room temperature in solution before extensive dephasing due to the size-dispersion kicks in. As compared to the frequency-frequency maps that are commonly used in 2DES, the time-frequency maps allow for exploiting electronic coherences without additional post processing and with fewer 2DES measurements. Towards quantum technology applications, we also report on the modeling of the time-frequency photocurrent response of these electronic coherences, which opens the way to integrating QD devices with classical architectures thereby enhancing the quantum advantage of such technologies for parallel information processing at room temperature.

The advantages of the directly measured time-frequency maps are discussed as a useful representation of the coherent output in a 2 dimensional electronic spectroscopy (2DES). We demonstrate the theory by a detailed application to the fast femtosecond beatings of a wide variety of electronic coherences in dimers of size-dispersed (9%) 3nm quantum dots (QDs). The observed and computed results can be consistently characterized directly in the time-frequency domain by probing the polarization in a 2DES set-up. Experimental and computed time-frequency maps are found in very good agreement and several electronic coherences are characterized at room temperature in solution before extensive dephasing due to the size-dispersion kicks in. As compared to the frequency-frequency maps that are commonly used in 2DES, the time-frequency maps allow for exploiting electronic coherences without additional post processing and with fewer 2DES measurements of polarization. Towards quantum technology applications, we also report on the modeling of the time-frequency photocurrent response of these electronic coherences, which opens the way to integrating QD devices with classical architectures thereby enhancing the quantum advantage of such technologies for parallel information processing at room temperature.

The electrocardiograms of 286 autopsied patients with Q waves in Leads I or aVL who had high precordial leads taken were reviewed. Twenty patients displayed QRS changes of infarction in the high precordial leads, without demonstrating any diagnostic QRS changes in the standard precordial leads. In only two instances was the electrocardiographic diagnosis supported at autopsy. It is suggested by this study that myocardial infarction is the exceptional cause for the electrocardiographic abnormalities seen only in the high precordial leads.