Quantum Zeno Effect Rationalizes the Phonon Bottleneck in Semiconductor Quantum Dots

Kilina, Svetlana; Neukirch, Amanda; Habenicht, Bradley F.; Kilin, Dmitri S.; Prezhdo, Oleg V.

doi:10.1103/physrevlett.110.180404

Cited by 234 publications

(365 citation statements)

References 61 publications

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“…It is the suppression of unitary time evolution caused by quantum decoherence within the system [110]. The quantum Zeno effect rationalized the phonon bottleneck seen in semiconductor QDs [136]. Note that decoherence can also accelerate the dynamics [137].…”

Section: Phonon Bottleneckmentioning

confidence: 96%

See 1 more Smart Citation

Time-domain ab initio modeling of excitation dynamics in quantum dots

Neukirch¹,

Hyeon‐Deuk²,

Prezhdo³

2014

Coordination Chemistry Reviews

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The review discusses the results of ab initio time-dependent density functional theory and nonadiabatic molecular dynamics simulations of photoinduced dynamics of charges, excitons, plasmons, and phonons in semiconductor and metallic quantum dots (QD). The simulations create an explicit timedomain representation of the excited-state processes, including elastic and inelastic electron-phonon scattering, multiple exciton generation, fission, and recombination. These nonequilibrium phenomena control the optical and electronic properties of QDs. Our approach can account for QD size and shape, as well as chemical details of QD structure, such as dopants, defects, core/shell regions, surface ligands, and unsaturated bonds. Each of these variations significantly alters the properties of photoexcited QDs.The insights reported in this review provide a comprehensive understanding of the excited-state dynamics in QDs and suggest new ways of controlling the photo-induced processes. The design principles that follow, guide development of photovoltaic cells, electronic and spintronic devices, biological labels, and other systems rooted in the unique physical and chemical properties of nanoscale materials.

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Section: Phonon Bottleneckmentioning

confidence: 96%

“…When the semiclassical decoherence correction was included in TDDFT-NAMD [46], a phonon bottleneck between the 1P e and 1S e states in a CdSe QD was observed in the simulation [136]. Using the optical response formalism, Section 2.6, the pure-dephasing time between these states was found to be 36 fs.…”

Section: Phonon Bottleneckmentioning

confidence: 98%

Time-domain ab initio modeling of excitation dynamics in quantum dots

Neukirch¹,

Hyeon‐Deuk²,

Prezhdo³

2014

Coordination Chemistry Reviews

Self Cite

View full text Add to dashboard Cite

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“…An accurate description of quantum dynamics is needed in many areas of physics and related disciplines, including photovoltaic and photocatalytic applications [1][2][3], lightoperated nanoscale materials [4,5] and molecular electronics [6][7][8][9]. The large number of quantum, semiclassical, and quantum-classical techniques of varying complexity have been developed over the last few decades [10][11][12][13][14][15] and successfully applied to study nonequilibrium processes such as electron-phonon relaxation [1,[16][17][18], charge and energy transfer [19,20], and photoinduced atomistic rearrangements [21,22].…”

mentioning

confidence: 99%

“…The large number of quantum, semiclassical, and quantum-classical techniques of varying complexity have been developed over the last few decades [10-15] and successfully applied to study nonequilibrium processes such as electron-phonon relaxation [1,[16][17][18], charge and energy transfer [19,20], and photoinduced atomistic rearrangements [21,22]. Highly accurate fully quantum methods [23][24][25] are extremely computationally demanding and can be applied only to small systems and short time scales.…”

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confidence: 99%

Second-Quantized Surface Hopping

Akimov

Prezhdo

2014

Phys. Rev. Lett.

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The trajectory surface hopping method for quantum dynamics is reformulated in the space of many-particle states to include entanglement and correlation of trajectories. Used to describe many-body correlation effects in electronic structure theories, second quantization is applied to semiclassical trajectories. The new method allows coupling between individual trajectories via energy flow and common phase evolution. It captures the properties of a wave packet, such as branching, Heisenberg uncertainty, and decoherence. Applied to a superexchange process, the method shows very accurate results, comparable to exact quantum data and improving greatly on the standard approach.

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“…Moreover, it was predicted that an enhancement of decay due to frequent measurements could also be observed, a phenomenon which is called AZE [35,36]. Although shown theoretically to be possible for a variety of potential applications [37][38][39][40][41][42][43], QZE and AZE are not seen as prevalent a subject as the other methods that were mentioned above. This is mainly because that their experimental realizations have been beset with the following two obstacles: Firstly, the time scale for the initial nonexponential decay is often too short to implement frequent measurements, for example, this time scale for the spontaneous emission of atoms in the vacuum is roughly of the order of 10 −17 s. Secondly, it is hard to realize frequent measurements on a highly unstable quantum system [33].…”

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confidence: 99%

Simulating Zeno physics by a quantum quench with superconducting circuits

Tong

Kwek

et al. 2014

Phys. Rev. A

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Studying out-of-equilibrium physics in quantum systems under quantum quench is of vast experimental and theoretical interests. Using periodic quantum quenches, we present an experimentally accessible scheme to simulate the quantum Zeno and anti-Zeno effects in an open quantum system of a single superconducting qubit interacting with an array of transmission line resonators. The scheme is based on the following two observations: Firstly, compared with conventional systems, the short-time non-exponential decay in our superconducting circuit system is readily observed; and secondly, a quench-off process mimics an ideal projective measurement when its time duration is sufficiently long. Our results show the active role of quantum quench in quantum simulation and control.PACS numbers: 03.67.Ac., 03.65. Xp, 03.67.Pp, Introduction.-Recently, there has been an increasing interest in exploring quench dynamics in quantum systems, in which a parameter of the system is tuned abruptly at specific time [1]. Interest in this area has been evoked principally by several experimental realizations such as in ultra-cold atoms [2,3], where the high controllability in tuning parameters of the system has been achieved and the realization of different external sudden interruptions has been made accessible. Many important issues, for example the equilibration process and the relationship between thermalization and the integrability of many-body systems under quantum quench [4][5][6][7][8][9][10][11][12], have been investigated. So far, most of these works have focused on the ideal closed quantum systems. However, any realistic quantum system would become open due to the inevitable interaction with its surrounding environment, causing the so-called decoherence [13]. Studying quench dynamics in open system can not only cast better understanding on environment-induced decoherence effects under external interruptions but also give help in exploring potential strategies to control decoherence [14].

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Quantum Zeno Effect Rationalizes the Phonon Bottleneck in Semiconductor Quantum Dots

Cited by 234 publications

References 61 publications

Time-domain ab initio modeling of excitation dynamics in quantum dots

Time-domain ab initio modeling of excitation dynamics in quantum dots

Second-Quantized Surface Hopping

Simulating Zeno physics by a quantum quench with superconducting circuits

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