Quantum Interference and Coherence

Rhodes, William T.; Asakura, Toshimitsu; Brenner, Karl‐Heinz; Hänsch, Theodor W.; Kamiya, Toshio; Krausz, Ferenc; Ḿonemar, B.; Venghaus, H.; Weber, Horst; Weinfurter, Harald

doi:10.1007/b100106

Cited by 10 publications

(26 citation statements)

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“…Then, by defining a coordinate system one can show that in this limit (29) and (30) respectively. This part of a similar derivation is discussed in detail in [37].…”

Section: A1 Photon and Phonon Expectation Valuesmentioning

confidence: 94%

“…ij are the two-time expectation functions discussed shortly [37,39]. In (D.1), the sum runs through i, j=1, 2 for the monomers in the dimer.…”

Section: D2 Calculating Spectramentioning

confidence: 99%

“…The two-time expectation values of the lowering and raising operators are evaluated with the quantum regression theorem (QRT) [22,31,37,39]. This maps these expectation values onto elements of the system density matrix.…”

Section: D2 Calculating Spectramentioning

confidence: 99%

“…The theory behind the Markovian QRT is well documented [22,31,37], so we will just state the relevant results. One finds from using the QRT, that…”

Section: D3 Approximating F Pnmentioning

confidence: 99%

“…where s  ( ) t are the raising and lowering operators for monomer-j in the Heisenberg picture [37,39]. Note that to get the overall absorption of some weak probe-field one must subtract the emission spectrum from the absorption [37,39]. However, here we are only interested in the raw absorption spectrum.…”

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confidence: 99%

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Optimal power generation using dark states in dimers strongly coupled to their environment

2019

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Dark state protection has been proposed as a mechanism to increase the power output of light harvesting devices by reducing the rate of radiative recombination. Indeed many theoretical studies have reported increased power outputs in dimer systems which use quantum interference to generate dark states. These models have typically been restricted to particular geometries and to weakly coupled vibrational baths. Here we consider the experimentally-relevant strong vibrational coupling regime with no geometric restrictions on the dimer. We analyze how dark states can be formed in the dimer by numerically minimizing the emission rate of the lowest energy excited eigenstate, and then calculate the power output of the molecules with these dark states. We find that there are two distinct types of dark states depending on whether the monomers form homodimers, where energy splittings and dipole strengths are identical, or heterodimers, where there is some difference. Homodimers, which exploit destructive quantum interference, produce high power outputs but strong phonon couplings and perturbations from ideal geometries are extremely detrimental. Heterodimers, which are closer to the classical picture of a distinct donor and acceptor molecule, produce an intermediate power output that is relatively stable to these changes. The strong vibrational couplings typically found in organic molecules will suppress destructive interference and thus favor the dark-state enhancement offered by heterodimers.

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“…Then, by defining a coordinate system one can show that in this limit (29) and (30) respectively. This part of a similar derivation is discussed in detail in [37].…”

Section: A1 Photon and Phonon Expectation Valuesmentioning

confidence: 94%

“…ij are the two-time expectation functions discussed shortly [37,39]. In (D.1), the sum runs through i, j=1, 2 for the monomers in the dimer.…”

Section: D2 Calculating Spectramentioning

confidence: 99%

Section: D2 Calculating Spectramentioning

confidence: 99%

“…The theory behind the Markovian QRT is well documented [22,31,37], so we will just state the relevant results. One finds from using the QRT, that…”

Section: D3 Approximating F Pnmentioning

confidence: 99%

mentioning

confidence: 99%

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Optimal power generation using dark states in dimers strongly coupled to their environment

2019

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Shaping the Spatial Coherence of Quantum Source

You 由

2024

Chinese Phys. Lett.

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Pulse propagation through a dielectric slab doped with a triple quantum dot nanostructure

Nasehi¹,

Mahmoudi²,

Sahrai³

2016

Laser Phys.

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The propagation of an electromagnetic pulse through a dielectric slab doped with a triple quantum dot (QD) nanostructure has been discussed in the presence of electron tunneling. We include the effect of an incoherent pump field in the transmission and reflection of a pulse in a triple QD. It is shown that the reflected and transmitted pulses can be switched from subluminal to superluminal light propagation by changing either the rate of the incoherent pump field or the inter-dot tunneling between QD1, QD2 and QD3 in a slab. Furthermore, it is demonstrated that the inter-dot tunnel coupling can significantly affect the behavior of optical bistability (OB) and optical multi-stability (OM) in a dielectric slab. The obtained results can be used for the development of new types of nanoelectronic devices for realizing the switching process.

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Quantum Interference and Coherence

Cited by 10 publications

References 0 publications

Optimal power generation using dark states in dimers strongly coupled to their environment

Optimal power generation using dark states in dimers strongly coupled to their environment

Shaping the Spatial Coherence of Quantum Source

Pulse propagation through a dielectric slab doped with a triple quantum dot nanostructure

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