Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Journal of Materials Chemistry C

Prospects for photon–phonon dressing and crystal-field non-Hermitian alignment of Eu 3+ :BiPO 4

Muhammad Usman, Iqbal Hussain, Muhammad Kashif Majeed, Faisal Munir, Faisal Nadeem, Muhammad Waqas Usmani, Irfan Ahmad, Faizan Raza, Yanpeng Zhang

Published Jan 1, 2025• 7 citations
Publisher

Abstract

We report non-Hermitian energy level alignment via photon–phonon dressing quantization. We propose a spectral homogenizer based on four types of alignment, revealing that the reverse dressing effect induces this alignment.
DOI
10.1039/d4tc03660c

Related papers

Prospects for Photon-Phonon Dressing and Crystal-Field Non-Hermitian Alignment of Eu3+: Bipo4

Muhammad Usman, Iqbal Hussain, Muhammad Kashif Majeed +6 more

•Jan 1, 2024•0 citations

Optical Router and 4 × 1 Multiplexer of Coexisting Crystal Field and Non‐Hermitian Autler‐Townes Splitting Controlled by Photon–Phonon Dressing in Eu 3+ : BiPO 4

Anas Mujahid, Huanrong Fan, Yafen Wang +7 more

Abstract For the first time, the Autler Townes‐splitting dependency on parity‐time symmetry breaking is investigated. The first‐, second‐, and third‐order splitting in spectral domain outputs obtained through different phase transitions of Eu 3+ : BiPO 4 are explored. First‐order splitting corresponds to pure crystal field splitting attributed to the shifting of energy levels and the inherent effect of the crystal field. Second/third‐order splitting results from the coexistence of crystal field and non‐Hermitian spectral Autler Townes (SAT)‐splitting caused by single‐photon dressing coupled with the interaction of phonon and double photon–phonon dressing. It is further explored the relationship between spectral and temporal‐domain splitting obtained through the different phases of Eu 3+ : BiPO 4 by changing the laser detuning. It is authenticated that the contributions of crystal field, photon, and phonon dressing interactions can only be individually distinguished in the spectral domain. Moreover, the experiment results suggest the analogy of an optical 4 × 1 multiplexer with a channel spacing contrast of ≈91% and an optical router with a channel equalization ratio of ≈93%.

Advanced Quantum Technologies•Sep 8, 2023•6 citations

Spectral and temporal atomic coherence interaction in Eu 3+ : NaYF 4 and Eu 3+ : BiPO 4

Zhou Feng, Muhammad Imran, Faisal Nadeem +5 more

demonstrates the strongest cross-interaction and longest coherent time under the dressing effect due to the smallest dressing phonon detuning and off-resonance profile cross-interaction at PMT2 because the angle quantization is the strongest. Such results can be used for designing novel quantum devices and have potential applications in quantum memory devices.

Physical Chemistry Chemical Physics•Dec 21, 2023•0 citations

Natural non-Hermitian interaction alignment with photon-phonon quantization in Eu3+: NaYF4

Iqbal Hussain, Usman Javed, Muhammad Fahad Ather +7 more

We investigated the photon and phonon alignment for two dressing interaction profile in Eu+3: NaYF4. The evolution from strong to weak interaction alignment can be controlled by time gate width and time gate position, which shows that time gate position seems more sensitive than time gate width, while changing both can make interaction alignment oscillation due to two phonon and one photon quantization. Fluorescence FL signal switch from dip to peak interaction profile due to strong gamma, while the Super-Fluorescence SFWM signal switch from peak to dip interaction profile due to strong Rabi frequency (G). Comparing single laser spectral alignment to two-laser interaction alignment, the FL and SFWM shows dressing peak dip switch (spectral to interaction profile). In contrast, there is no switch in AT (spectral to interaction profile) because, the phase difference of the second laser balances the destructive and constructive dressing quantization’s. Such results can have potential applications in fine and hyper structure interaction alignment in non-polar ion.

Results in Physics•Jun 16, 2024•3 citations

Non‐Hermitian Photon‐Phonon Quantization Evolution Controlled by QWP Polarization Phase in Sm 3+ : BiPO 4

Sehrish Aslam, Usman Javed, Fiza Latif +4 more

ABSTRACT Non‐Hermitian quantum dynamics provide powerful approaches for controlling gain and loss in open quantum systems. However, experimental methods for tuning non‐Hermitian quantization remain limited. In this work, we investigate the evolution of non‐Hermitian photon–phonon dressed‐state quantization in Sm 3+ : BiPO 4 controlled by the polarization‐dressing phase using a quarter‐wave plate (QWP). We observed three types of destructive and constructive switching behavior, governed by the initial phase and determined by the competition between photon‐dressing Rabi frequency and dephasing rate. By continuously tuning the polarization phase, destructive quantization appears when the dephasing rate is dominant, whereas constructive quantization is stabilized by the photon Rabi frequency. These regimes exhibit discrete optical jumps, Landau‐like step‐level macroscopic quantization, and exceptional‐point switching between correlated states. Lower excitation power further enhances polarization‐controlled dressing quantization because of the larger dephasing rate. These results establish polarization phase as an effective control parameter for non‐Hermitian quantum jumps and macroscopic quantization, opening new possibilities for optical switching and quantum memory applications.

Advanced Quantum Technologies•Aug 29, 2026•0 citations

Super Broad Non-Hermitian Line Shape from Out-of-Phase and In-Phase Photon-Phonon Dressing in Eu3+: NaYF4 and Eu3+: BiPO4

Muhammad Kashif Majeed, Muhammad Usman, Iqbal Hussain +7 more

We report super broad non-Hermitian line shape from out-of-phase and in-phase photon-phonon dressing (quantization) in Eu3+: NaYF4 and Eu3+: BiPO4 nanocrystals. The line shape is controlled by changing time gate position, time gate width, power, temperature, sample, photomultiplier tubes, and laser. We observed that the fluorescence (FL) line-shape contrasts are 69.23% for Eu3+: BiPO4 and 43.75% for Eu3+: NaYF4, owing to the stronger out-of-phase photon-phonon dressing (destructive quantization). Moreover, we observed that the spontaneous four-wave mixing (SFWM) line shape was approximately three times wider at 300 K than at 77 K for the [(12:1)-phase] Eu3+: NaYF4 due to more high-frequency in-phase phonon dressing (strong constructive quantization). Furthermore, we showed that the noise line-shape width remains unchanged for Eu3+: BiPO4 (16 nm) and Eu3+: NaYF4 (12 nm) due to out-of-phase and in-phase photon-phonon dressing balance. Such results have potential applications in multi-channel band stop filter.

Photonics•Dec 12, 2024•0 citations
Abstract For the first time, the Autler Townes‐splitting dependency on parity‐time symmetry breaking is investigated. The first‐, second‐, and third‐order splitting in spectral domain outputs obtained through different phase transitions of Eu 3+ : BiPO 4 are explored. First‐order splitting corresponds to pure crystal field splitting attributed to the shifting of energy levels and the inherent effect of the crystal field. Second/third‐order splitting results from the coexistence of crystal field and non‐Hermitian spectral Autler Townes (SAT)‐splitting caused by single‐photon dressing coupled with the interaction of phonon and double photon–phonon dressing. It is further explored the relationship between spectral and temporal‐domain splitting obtained through the different phases of Eu 3+ : BiPO 4 by changing the laser detuning. It is authenticated that the contributions of crystal field, photon, and phonon dressing interactions can only be individually distinguished in the spectral domain. Moreover, the experiment results suggest the analogy of an optical 4 × 1 multiplexer with a channel spacing contrast of ≈91% and an optical router with a channel equalization ratio of ≈93%.
We investigated the photon and phonon alignment for two dressing interaction profile in Eu+3: NaYF4. The evolution from strong to weak interaction alignment can be controlled by time gate width and time gate position, which shows that time gate position seems more sensitive than time gate width, while changing both can make interaction alignment oscillation due to two phonon and one photon quantization. Fluorescence FL signal switch from dip to peak interaction profile due to strong gamma, while the Super-Fluorescence SFWM signal switch from peak to dip interaction profile due to strong Rabi frequency (G). Comparing single laser spectral alignment to two-laser interaction alignment, the FL and SFWM shows dressing peak dip switch (spectral to interaction profile). In contrast, there is no switch in AT (spectral to interaction profile) because, the phase difference of the second laser balances the destructive and constructive dressing quantization’s. Such results can have potential applications in fine and hyper structure interaction alignment in non-polar ion.
ABSTRACT Non‐Hermitian quantum dynamics provide powerful approaches for controlling gain and loss in open quantum systems. However, experimental methods for tuning non‐Hermitian quantization remain limited. In this work, we investigate the evolution of non‐Hermitian photon–phonon dressed‐state quantization in Sm 3+ : BiPO 4 controlled by the polarization‐dressing phase using a quarter‐wave plate (QWP). We observed three types of destructive and constructive switching behavior, governed by the initial phase and determined by the competition between photon‐dressing Rabi frequency and dephasing rate. By continuously tuning the polarization phase, destructive quantization appears when the dephasing rate is dominant, whereas constructive quantization is stabilized by the photon Rabi frequency. These regimes exhibit discrete optical jumps, Landau‐like step‐level macroscopic quantization, and exceptional‐point switching between correlated states. Lower excitation power further enhances polarization‐controlled dressing quantization because of the larger dephasing rate. These results establish polarization phase as an effective control parameter for non‐Hermitian quantum jumps and macroscopic quantization, opening new possibilities for optical switching and quantum memory applications.
We report super broad non-Hermitian line shape from out-of-phase and in-phase photon-phonon dressing (quantization) in Eu3+: NaYF4 and Eu3+: BiPO4 nanocrystals. The line shape is controlled by changing time gate position, time gate width, power, temperature, sample, photomultiplier tubes, and laser. We observed that the fluorescence (FL) line-shape contrasts are 69.23% for Eu3+: BiPO4 and 43.75% for Eu3+: NaYF4, owing to the stronger out-of-phase photon-phonon dressing (destructive quantization). Moreover, we observed that the spontaneous four-wave mixing (SFWM) line shape was approximately three times wider at 300 K than at 77 K for the [(12:1)-phase] Eu3+: NaYF4 due to more high-frequency in-phase phonon dressing (strong constructive quantization). Furthermore, we showed that the noise line-shape width remains unchanged for Eu3+: BiPO4 (16 nm) and Eu3+: NaYF4 (12 nm) due to out-of-phase and in-phase photon-phonon dressing balance. Such results have potential applications in multi-channel band stop filter.