Enhanced Excited State Population and Coherence via Adiabatic Tunneling Ionization and Excitation

• URL: http://arxiv.org/abs/2505.22833v1
• Date: Wed, 28 May 2025 20:13:56 GMT
• Title: Enhanced Excited State Population and Coherence via Adiabatic Tunneling Ionization and Excitation
• Authors: Chi-Hong Yuen,
• Abstract summary: Tunneling ionization followed by strong-field excitation leads to ultrafast phenomena such as charge migration and lasing.<n>Recent developments suggest that the population of the ionic excited state can be greatly enhanced due to the complex interplay between tunneling and excitation.<n>This work introduces a novel framework for generating and controlling the electronic excited state and coherence using intense laser pulses.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Tunneling ionization followed by strong-field excitation leads to important ultrafast phenomena such as charge migration and lasing. Recent theoretical developments suggest that the population of the ionic excited state can be greatly enhanced due to the complex interplay between tunneling and excitation. In this Letter, using an adiabatic approach for both tunneling and excitation, semi-analytical solutions are derived for the population and coherence of a two-level ionic system. This approach removes the strong-field dressing, revealing novel sub-half-cycle processes for excited state population and coherence buildup. It predicts that the excited state population is enhanced by an order of magnitude, independent of the laser wavelength, while coherence amplitude can be boosted by over four orders of magnitude for a multi-cycle pulse. For a single-cycle pulse, it suggests that coherence amplitude decreases rapidly as the wavelength increases. This work introduces a novel framework for generating and controlling the electronic excited state and coherence using intense laser pulses, with applications in strong-field control of chemistry and lasing.

Related papers

• High-speed and high-connectivity two-qubit gates in long chains of trapped ions [35.40737096974622]
  impulsive spin-dependent excitation can be used to perform high-fidelity non-local entangling operations in quasi-uniform chains of up to 40 ions.<n>We identify a regime of phonon-mediated entanglement between arbitrary pairs of ions in the chain, where any two pairs of ions in the chain can be entangled in approximately 1.3-2 centre-of-mass oscillation periods.<n>These results suggest entangling gates based on impulsive spin-dependent excitation presents new possibilities for large-scale computation in near-term ion-trap devices.
  arXiv  Detail & Related papers  (2025-06-13T01:09:06Z)
• Probing excited-state dynamics of transmon ionization [47.00361052400629]
  We study the excited-state dynamics induced by strong drives during readout in circuit QED.<n>With up to 10 resolvable states, we quantify the critical photon number of ionization, the resulting state after ionization, and the fraction of the population transferred to highly excited states.
  arXiv  Detail & Related papers  (2025-05-01T16:28:03Z)
• Spin self-organization in an optical cavity facilitated by inhomogeneous broadening [0.0]
  We study the onset of collective spin-self-organization in a thermal ensemble of driven two-level atoms confined in an optical cavity.<n>We find that inhomogeneous Doppler broadening facilitates the onset of spin-self-organization.
  arXiv  Detail & Related papers  (2024-07-29T05:03:53Z)
• Dissipative stabilization of maximal entanglement between non-identical emitters via two-photon excitation [49.1574468325115]
  Two non-identical quantum emitters, when placed within a cavity and coherently excited at the two-photon resonance, can reach stationary states of nearly maximal entanglement. We show that this mechanism is merely one among a complex family of phenomena that can generate both stationary and metastable entanglement when driving the emitters at the two-photon resonance.
  arXiv  Detail & Related papers  (2023-06-09T16:49:55Z)
• Tailoring population transfer between two hyperfine ground states of Rb87 [49.1574468325115]
  We investigate the coherent control over a complex multi-level atomic system using the stimulated Raman adiabatic passage (STIRAP) We demonstrate the ability to decompose the system into three- and four-level subsystems independently interacting with light beams.
  arXiv  Detail & Related papers  (2022-10-21T14:57:21Z)
• Driving Force and Nonequilibrium Vibronic Dynamics in Charge Separation of Strongly Bound Electron-Hole Pairs [59.94347858883343]
  We study the dynamics of charge separation in one, two and three-dimensional donor-acceptor networks. This allows us to identify the precise conditions in which underdamped vibrational motion induces efficient long-range charge separation.
  arXiv  Detail & Related papers  (2022-05-11T17:51:21Z)
• Enhanced coupling of electron and nuclear spins by quantum tunneling resonances [0.0]
  We propose a controllable mechanism to enhance this transfer rate. We analyze the spin dynamics of helium-3 atoms with hot, optically-excited potassium atoms. We find a resonant enhancement of the spin-exchange cross section by up to six orders of magnitude and two orders of magnitude enhancement for the thermally averaged, polarization rate-coefficient.
  arXiv  Detail & Related papers  (2022-01-04T17:33:02Z)
• Strongly entangled system-reservoir dynamics with multiphoton pulses beyond the two-excitation limit: Exciting the atom-photon bound state [62.997667081978825]
  We study the non-Markovian feedback dynamics of a two-level system interacting with the electromagnetic field inside a semi-infinite waveguide. We compare the trapped excitation for an initially excited quantum emitter and an emitter prepared via quantized pulses containing up to four photons.
  arXiv  Detail & Related papers  (2020-11-07T12:56:16Z)
• Sub-barrier pathways to Freeman resonances [0.0]
  An intuitive model is put forward which explains the mechanism of the intermediate population of excited states during nonadiabatic tunneling ionization. The enhancement of ionization is shown to arise due to the constructive interference of contributions into the excitation amplitudes originating from different laser cycles.
  arXiv  Detail & Related papers  (2020-09-14T19:52:32Z)
• Subradiance with saturated atoms: population enhancement of the long-lived states [0.0]
  Dipole-dipole interactions are at the origin of long-lived collective atomic states, often called subradiant. We experimentally demonstrate a two hundred-fold increase in the population of these modes, as the saturation parameter of the driving field is increased.
  arXiv  Detail & Related papers  (2020-09-10T22:59:52Z)
• Optically pumped spin polarization as a probe of many-body thermalization [50.591267188664666]
  We study the spin diffusion dynamics of 13C in diamond, which we dynamically polarize at room temperature via optical spin pumping of engineered color centers. We find good thermal contact throughout the nuclear spin bath, virtually independent of the hyperfine coupling strength. Our results open intriguing opportunities to study the onset of thermalization in a system by controlling the internal interactions within the bath.
  arXiv  Detail & Related papers  (2020-05-01T23:16:33Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.