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

Europhysics Letters (EPL)

Coherent fluorescence resonance energy transfer: Construction of nonlocal multiparticle entangled states and quantum computing

Sergey K. Sekatskii, Majed Chergui, Giovanni Dietler

Published Jul 1, 2003• 24 citations
Publisher

Abstract

The coherent Fluorescence Resonance Energy Transfer (FRET) combined with Scanning Near-Field Optical Microscopy (SNOM) are proposed for the creation of complex and nonlocal entangled states involving hundreds of atoms. Micro- and milli-second decoherence times of the electron excitation occur for rare-earth dopant ions in crystals at low temperatures, and we show that the characteristic coherent FRET distances for such systems are of the order of 20 nm. Thus, both position and time precision necessary for the quantum manipulation can be attained by modern SNOM technology. Potential applications for quantum computing are discussed.

DOI
10.1209/epl/i2003-00472-2

Related papers

Coherent fluorescence resonance energy transfer between two dipoles: Full quantum electrodynamics approach

В. В. Климов, Sergey K. Sekatskii, Giovanni Dietler

The quantum electrodynamical theory of coherent fluorescence resonance energy transfer (FRET) between two dipoles (free atoms, molecules or dopant centres in crystalline matrices at low temperature conditions) in an arbitrary non-dissipative environment is elaborated using a canonical quantization scheme. It is shown that population dynamics of both atoms can be expressed in terms of a classical Green function. This general theory corresponds well to the problem of description of controllable quantum manipulations under the donor-acceptor system (e.g. its application for FRET scanning near-field optical microscopy-based quantum computing). In addition, its usefulness is illustrated for the case of coherent FRET in free space and for the case when atoms are placed near an ideally conducting plane. The possibility of creating an entangled state of three atoms is demonstrated.

Journal of Modern Optics•May 8, 2004•11 citations

Coherent cooperative fluorescence resonance energy transfer

Sergey K. Sekatskii, Konstantin K. Pukhov

Cooperative fluorescence resonance energy transfer effect is experimentally demonstrated for a few crystals doped with rare-earth ions. We show that, at the liquid helium temperatures in similar crystals, coherent cooperative fluorescence resonance energy transfer, as well as an inverse coherent up-conversion process, could be observed, and briefly discuss possible applications of these effects.

Optics and Spectroscopy•Dec 1, 2014•1 citation

Coherent exciton mechanism of three-dimensional quantum optical lithography

Eugen Pavel

Two- and three-dimensional effects observed in quantum optical lithography indicate the existence of a long-distance energy migration, greater than 500 nm, to a reaction center with a diameter smaller than 1 nm. The confinement effect was obtained by energy transfer of coherent Frenkel excitons in an electric field gradient followed by a cooperative process of rare-earth ions in fluorescent photosensitive glass ceramics. A mechanism is proposed and discussed in order to explain the breakthrough of the diffraction limit of light. Fluorescent photosensitive glass ceramics act as a coherent perfect absorber, a time-reversed laser.

Applied Optics•May 7, 2015•9 citations

Resonance fluorescence and cavity quantum electrodynamics with quantum dots

Andreas Müller

Next-generation information technology is expected to rely on discrete two-state quantum systems that can deterministically emit single photons. Quantum dots are mesoscopic (~10,000 atoms large) semiconductor islands grown in a host crystal of larger band-gap that make well-defined two-level quantum systems and are very attractive due to stability, record coherence times, and the possibility of integrating them into larger structures, such as optical microcavities. This work presents experimental progress towards understanding the coherent optical processes that occur in single quantum dots, particularly such phenomena that might be one day utilized for quantum communication applications. High resolution low temperature optical spectroscopy is used in conjunction with first order (amplitude) and second-order (intensity) correlation measurements of the emitted field. A novel technique is introduced that is capable of harvesting the fluorescence of single dots at the same frequency as the laser, previously impossible due to insurmountable scattering. This technique enables the observation, for the first time, of single quantum dot resonance fluorescence, in both the weak and strong excitation regimes, which forms the basis for deterministic generation of single photons. Guided by the rich theoretical description available from quantum optics with atoms we obtain insight into the complex dynamics of this driven system. Quantum dots confined to novel optical microcavities were further investigated using micro photoluminescence. An optical microcavity properly coupled to a two-level system can profoundly modify its emission characteristics via quantum electrodynamical effects, which are highly attractive for single photon sources. The all-epitaxial structures we probe are distinguished by a bulk morphology that overcomes the fragility problems of existing approaches, and provides high quality factors as well as small mode volumes. Lasing is obtained with larger strucutres. Additionally, isolation of individual dots is further realized in smaller cavities and the Purcell effect observed in time-resolved photon counting experiments.

•May 1, 2007•2 citations

Quantum Engineering of Bright-Dark Optical States of Resonantly Interacting Rare Earth Ions with Nanolocal Stark Effect

Konstantin K. Pukhov, Sergey K. Sekatskii

Earlier an idea to use controlled with modern Scanning Probe Microscopy (SPM) technique resonant interaction of dipoles (fluorescent rare earth (RE) ions in crystals) was put forward. Here we discuss the possibility to exploit nanolocal Stark effect, caused in such systems by strong inhomogeneous electric fields of sharp SPM electrodes (tips), to engineer the dark - bright states of resonantly interacting dipoles: their energies and decay (decoherence) rates can be strongly influenced by such fields.

International Conference Laser Optics (ICLO)•Jun 20, 2022•0 citations

Resonant Transfer of Excitons and Quantum Computation

Lovett, B, Reina, J H, Ahsan Nazir +2 more

Resonant energy transfer mechanisms have been observed in the sensitized luminescence of solids, and in quantum dots, molecular nanostructures, and photosynthetic organisms. We demonstrate that such mechanisms, together with the exciton-exciton binding energy shift typical of these nanostructures, can be used to perform universal quantum logic and generate quantum entanglement. (C) 2003 Elsevier B.V. All rights reserved.

•Sep 11, 2002•28 citations
The coherent Fluorescence Resonance Energy Transfer (FRET) combined with Scanning Near-Field Optical Microscopy (SNOM) are proposed for the creation of complex and nonlocal entangled states involving hundreds of atoms. Micro- and milli-second decoherence times of the electron excitation occur for rare-earth dopant ions in crystals at low temperatures, and we show that the characteristic coherent FRET distances for such systems are of the order of 20 nm. Thus, both position and time precision necessary for the quantum manipulation can be attained by modern SNOM technology. Potential applications for quantum computing are discussed.
The quantum electrodynamical theory of coherent fluorescence resonance energy transfer (FRET) between two dipoles (free atoms, molecules or dopant centres in crystalline matrices at low temperature conditions) in an arbitrary non-dissipative environment is elaborated using a canonical quantization scheme. It is shown that population dynamics of both atoms can be expressed in terms of a classical Green function. This general theory corresponds well to the problem of description of controllable quantum manipulations under the donor-acceptor system (e.g. its application for FRET scanning near-field optical microscopy-based quantum computing). In addition, its usefulness is illustrated for the case of coherent FRET in free space and for the case when atoms are placed near an ideally conducting plane. The possibility of creating an entangled state of three atoms is demonstrated.
Two- and three-dimensional effects observed in quantum optical lithography indicate the existence of a long-distance energy migration, greater than 500 nm, to a reaction center with a diameter smaller than 1 nm. The confinement effect was obtained by energy transfer of coherent Frenkel excitons in an electric field gradient followed by a cooperative process of rare-earth ions in fluorescent photosensitive glass ceramics. A mechanism is proposed and discussed in order to explain the breakthrough of the diffraction limit of light. Fluorescent photosensitive glass ceramics act as a coherent perfect absorber, a time-reversed laser.
Next-generation information technology is expected to rely on discrete two-state quantum systems that can deterministically emit single photons. Quantum dots are mesoscopic (~10,000 atoms large) semiconductor islands grown in a host crystal of larger band-gap that make well-defined two-level quantum systems and are very attractive due to stability, record coherence times, and the possibility of integrating them into larger structures, such as optical microcavities. This work presents experimental progress towards understanding the coherent optical processes that occur in single quantum dots, particularly such phenomena that might be one day utilized for quantum communication applications. High resolution low temperature optical spectroscopy is used in conjunction with first order (amplitude) and second-order (intensity) correlation measurements of the emitted field. A novel technique is introduced that is capable of harvesting the fluorescence of single dots at the same frequency as the laser, previously impossible due to insurmountable scattering. This technique enables the observation, for the first time, of single quantum dot resonance fluorescence, in both the weak and strong excitation regimes, which forms the basis for deterministic generation of single photons. Guided by the rich theoretical description available from quantum optics with atoms we obtain insight into the complex dynamics of this driven system. Quantum dots confined to novel optical microcavities were further investigated using micro photoluminescence. An optical microcavity properly coupled to a two-level system can profoundly modify its emission characteristics via quantum electrodynamical effects, which are highly attractive for single photon sources. The all-epitaxial structures we probe are distinguished by a bulk morphology that overcomes the fragility problems of existing approaches, and provides high quality factors as well as small mode volumes. Lasing is obtained with larger strucutres. Additionally, isolation of individual dots is further realized in smaller cavities and the Purcell effect observed in time-resolved photon counting experiments.
Earlier an idea to use controlled with modern Scanning Probe Microscopy (SPM) technique resonant interaction of dipoles (fluorescent rare earth (RE) ions in crystals) was put forward. Here we discuss the possibility to exploit nanolocal Stark effect, caused in such systems by strong inhomogeneous electric fields of sharp SPM electrodes (tips), to engineer the dark - bright states of resonantly interacting dipoles: their energies and decay (decoherence) rates can be strongly influenced by such fields.