Simultaneous SU(2) rotations on multiple quantum dot exciton qubits using a single shaped pulse

Mathew, Rogers; Yang, Hong Yi Shi; Hall, K. C.

doi:10.1103/physrevb.92.155306

Cited by 7 publications

(3 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this work, we demonstrate the simultaneous inversion of an ensemble of >10 QDs with a wide range of optical properties using a single chirped laser pulse. While some progress in the parallel driving of distinct QDs has been made in recent years, including the application of general pulse shape engineering to arbitrary qubit rotations 20 , 41 , 47 – 49 , these experiments have been limited to a pair of quantum dots, in contrast to the work reported here. The implementation of ARP on distinct emitters could be applied to parallel quantum state initialization in QD-based qubits and to laser triggering of QD sources of single photons, adding to the toolkit for coherent optical control in solid-state systems.…”

Section: Discussionmentioning

confidence: 99%

Robust parallel laser driving of quantum dots for multiplexing of quantum light sources

Ramachandran,

Wilbur,

Mathew

et al. 2024

Sci Rep

Self Cite

View full text Add to dashboard Cite

Deterministic sources of quantum light (i.e. single photons or pairs of entangled photons) are required for a whole host of applications in quantum technology, including quantum imaging, quantum cryptography and the long-distance transfer of quantum information in future quantum networks. Semiconductor quantum dots are ideal candidates for solid-state quantum emitters as these artificial atoms have large dipole moments and a quantum confined energy level structure, enabling the realization of single photon sources with high repetition rates and high single photon purity. Quantum dots may also be triggered using a laser pulse for on-demand operation. The naturally-occurring size variations in ensembles of quantum dots offers the potential to increase the bandwidth of quantum communication systems through wavelength-division multiplexing, but conventional laser triggering schemes based on Rabi rotations are ineffective when applied to inequivalent emitters. Here we report the demonstration of the simultaneous triggering of >10 quantum dots using adiabatic rapid passage. We show that high-fidelity quantum state inversion is possible in a system of quantum dots with a 15 meV range of optical transition energies using a single broadband, chirped laser pulse, laying the foundation for high-bandwidth, multiplexed quantum networks.

show abstract

Section: Discussionmentioning

confidence: 99%

Robust parallel laser driving of quantum dots for multiplexing of quantum light sources

Ramachandran,

Wilbur,

Mathew

et al. 2024

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

“…The first term models a periodic phase commonly used in optimal quantum control [42]. The second term is a quadratic phase which introduces a linear chirp in the time domain [43] and which is used to account for pulse induced shifts during the single photon emission process.…”

Section: B Pulse Shapingmentioning

confidence: 99%

Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton

Praschan,

Heinze,

Breddermann

et al. 2021

Preprint

View full text Add to dashboard Cite

Semiconductor quantum dots embedded in optical cavities are promising on-demand sources of single photons. Here, we theoretically study single photon emission from an optically driven twophoton Raman transition between the biexciton and the ground state of a quantum dot. The advantage of this process is that it allows all-optical control of the properties of the emitted single photon with a laser pulse. However, with the presence of other decay channels and excitationinduced quantum interference, on-demand emission of the single Raman photon is generally difficult to achieve. Here we show that laser pulses with non-trivial shapes can be used to maintain excitation conditions for which with increasing pulse intensities the on-demand regime is reached. To provide a realistic picture of the achievable system performance, we include phonon-mediated processes in the theoretical caluclations. While preserving both high photon purity and indistinguishability, we find that although based on a higher-order emission process, for realistic system parameters on-demand Raman photon emission is indeed achievable with suitably tailored laser pulses.

show abstract

“…The performance of QD-based single and entangled photon sources has continued to improve over the past decade [14][15][16][17][18][19][20][21][22][23][24][25][26] , with the latter recently surpassing the commercial standard based on parametric down conversion 1 . Progress towards the development of functional quantum networks using QDs has also occurred at a remarkable pace, including demonstrations of fast 27 and arbitrary [28][29][30][31][32][33] single qubit rotations, two-qubit gates [9][10][11]34,35 , spin-photon entanglement [36][37][38] , spin-spin entanglement 39,40 , and quantum state transfer 41,42 .…”

mentioning

confidence: 99%

Suppression of Decoherence tied to Electron-Phonon Coupling in Telecom-Compatible Quantum Dots: Low-threshold Reappearance Regime for Quantum State Inversion

Ramachandran,

Wilbur,

O'Neal

et al. 2020

Preprint

View full text Add to dashboard Cite

We demonstrate full suppression of dephasing tied to deformation potential coupling of confined electrons to longitunidal acoustic (LA) phonons in optical control experiments on large semiconductor quantum dots (QDs) with emission compatible with the low-dispersion telecommunications band at 1.3 µm. By exploiting the sensitivity of the electron-phonon spectral density to the size and shape of the QD, we demonstrate a four-fold reduction in the threshold pulse area required to enter the decoupled regime for exciton inversion using adiabatic rapid passage (ARP). Our calculations of the quantum state dynamics provide good agreement with our experimental results and indicate that the symmetry of the QD wave function provides an additional means to engineer the electronphonon interaction. Our findings will support the development of solid-state quantum emitters in future distributed quantum networks using semiconductor QDs.

show abstract

Simultaneous SU(2) rotations on multiple quantum dot exciton qubits using a single shaped pulse

Cited by 7 publications

References 65 publications

Robust parallel laser driving of quantum dots for multiplexing of quantum light sources

Robust parallel laser driving of quantum dots for multiplexing of quantum light sources

Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton

Suppression of Decoherence tied to Electron-Phonon Coupling in Telecom-Compatible Quantum Dots: Low-threshold Reappearance Regime for Quantum State Inversion

Contact Info

Product

Resources

About