Entangled photon spectroscopy

A Eshun, O Varnavski… - Accounts of Chemical …, 2022 - ACS Publications
Conspectus The enhanced interest in quantum-related phenomena has provided new
opportunities for chemists to push the limits of detection and analysis of chemical processes …

Two-photon fluorescence microscopy at extremely low excitation intensity: The power of quantum correlations

O Varnavski, T Goodson III - Journal of the American Chemical …, 2020 - ACS Publications
Quantum entanglement has been shown to imply correlations stronger than those allowed
by classical models. The possibility of performing tasks that are classically impossible has …

Nonlinear optical microscopy with ultralow quantum light

YZ Ma, B Doughty - The Journal of Physical Chemistry A, 2021 - ACS Publications
Nonlinear optical (NLO) microscopy relies on multiple light–matter interactions to provide
unique contrast mechanisms and imaging capabilities that are inaccessible to traditional …

Quantifying the enhancement of two-photon absorption due to spectral-temporal entanglement

T Landes, MG Raymer, M Allgaier, S Merkouche… - Optics …, 2021 - opg.optica.org
When a low flux of time-frequency-entangled photon pairs (EPP) illuminates a two-photon
transition, the rate of two-photon absorption (TPA) can be enhanced considerably by the …

Colors of entangled two-photon absorption

O Varnavski, SK Giri, TM Chiang… - Proceedings of the …, 2023 - National Acad Sciences
Multiphoton absorption of entangled photons offers ways for obtaining unique information
about chemical and biological processes. Measurements with entangled photons may …

Hot-band absorption can mimic entangled two-photon absorption

A Mikhaylov, RN Wilson… - The Journal of …, 2022 - ACS Publications
It has been proposed that entangled two-photon absorption (E2PA) can be observed with up
to 1010 lower photon flux than its classical counterpart, therefore enabling ultralow-power …

Quantum light-enhanced two-photon imaging of breast cancer cells

O Varnavski, C Gunthardt, A Rehman… - The Journal of …, 2022 - ACS Publications
Correct biological interpretation from cell imaging can be achieved only if the observed
phenomena proceed with negligible perturbation from the imaging system. Herein, we …

Single-photon scattering can account for the discrepancies among entangled two-photon measurement techniques

BP Hickam, M He, N Harper, S Szoke… - The Journal of …, 2022 - ACS Publications
Entangled photon pairs are predicted to linearize and increase the efficiency of two-photon
absorption, allowing continuous wave laser diodes to drive ultrafast time-resolved …

Enhancing entangled two-photon absorption for picosecond quantum spectroscopy

RK Burdick, GC Schatz… - Journal of the American …, 2021 - ACS Publications
Entangled two-photon absorption (ETPA) is known to create photoinduced transitions with
extremely low light intensity, reducing the risk of phototoxicity compared to classical two …

Setting bounds on entangled two-photon absorption cross sections in common fluorophores

KM Parzuchowski, A Mikhaylov, MD Mazurek… - Physical Review …, 2021 - APS
Excitation with entangled photon pairs may lead to an increase in the efficiency of two-
photon absorption at low photon flux. The corresponding process, entangled two-photon …