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29 Mar 2024 • Journal Article • Physical Review B
Ground-state interplane superconducting coherence length of
AbstractA long excitation coil piercing a superconducting ring is used to generate an ever increasing persistent current in the ring, until the current destroys the order parameter. Given that the penetration depth is known, this experiment measures, hypothetically, the coherence length . We examine various aspects of this theoretically driven
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26 Mar 2024 • Journal Article • Crystal Growth & Design
Colloidal Synthesis of (PbBr2)2(AMTP)2PbBr4 a Periodic Perovskite “Heterostructured” Nanocrystal
AbstractHeterostructures in nanoparticles challenge our common understanding of interfaces due to quantum confinement and size effects, giving rise to synergistic properties. An alternating heterostructure in which multiple and reoccurring interfaces appear in a single nanocrystal is hypothesized to accentuate such properties. We present a colloidal synthesis for perovskite
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26 Mar 2024 • Journal Article • Physical Review X
Conditional-not Displacement: Fast Multioscillator Control with a Single Qubit
AbstractBosonic encoding is an approach for quantum information processing, promising lower hardware overhead by encoding in the many levels of a harmonic-oscillator mode. Scaling to multiple modes requires weak interaction for independent control, yet strong interaction for fast control. Applying fast and efficient universal control on multiple modes remains an open problem
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26 Mar 2024 • Journal Article • Advanced Quantum Technologies
Spontaneous Disentanglement and Thermalization
AbstractThe problem of quantum measurement can be partially resolved by incorporating a process of spontaneous disentanglement into quantum dynamics. A modified master equation is proposed, which contains a nonlinear term giving rise to both spontaneous disentanglement and thermalization. It is found that the added nonlinear term enables limit cycle steady states, which are
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22 Mar 2024 • Preprint • arXiv
High Harmonic Generation by Bright Squeezed Vacuum
AbstractWe observe non-perturbative high harmonic generation in solids pumped by a macroscopic quantum state of light, bright squeezed vacuum (BSV), which we generate in a single spatiotemporal mode. Due to its broad photon-number distribution, covering states from $0$ to $2 \times 10^{13}$ photons per pulse, and sub-cycle electric field fluctuations over $\pm1\hbox{V}/\hbox{\r{A}}$
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20 Mar 2024 • Preprint • arXiv
Effects of dislocation filtering layers on optical properties of third telecom window emitting InAs/InGaAlAs quantum dots grown on silicon substrates
AbstractIntegrating light emitters based on III-V materials with silicon-based electronics is crucial for further increase in data transfer rates in communication systems since the indirect bandgap of silicon prevents its direct use as a light source. We investigate here InAs/InGaAlAs quantum dot (QD) structures grown directly on 5{\deg} off-cut Si substrate and emitting light
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14 Mar 2024 • Journal Article • Advanced Materials
Electrical Doping of Metal Halide Perovskites by Co-evaporation and Application in PN Junctions
AbstractElectrical doping of semiconductors is a revolutionary development that enabled many electronic and optoelectronic technologies. While doping of many inorganic and organic semiconductors has been well-established, controlled electrical doping of metal halide perovskites is yet to be demonstrated. In this work, we achieve efficient n- and p-type electrical doping of
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7 Mar 2024 • Journal Article • IEEE Transactions on Electron Devices
Toward Monolithic GaN on Si Inter-Sub-Band Infrared Optoelectronics
AbstractWe have successfully demonstrated the first CMOS-compatible monolithic epitaxial integration of GaN-based infrared (IR) detectors on Si. The device is a GaN/AlGaN quantum cascade detector (QCD) grown selectively in windows on a 4-in Si (111) substrate using plasma-assisted molecular beam epitaxy. The CMOS compatibility of the QCD growth method was verified by applying
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6 Mar 2024 • Preprint • arXiv
Continuous and deterministic all-photonic cluster state of indistinguishable photons
AbstractCluster states are key resources for measurement-based quantum information processing. Photonic cluster and graph states, in particular, play indispensable roles in quantum network and quantum metrology. We demonstrate a semiconductor quantum dot based device in which the confined hole spin acts as a needle in a quantum knitting machine producing continuously and
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6 Mar 2024 • Journal Article • PRX Quantum
Universal and Ultrafast Quantum Computation Based on Free-Electron-Polariton Blockade
AbstractCavity QED, wherein a quantum emitter is coupled to electromagnetic cavity modes, is a powerful platform for implementing quantum sensors, memories, and networks. However, due to the fundamental trade-off between gate fidelity and execution time, as well as limited scalability, the use of cavity QED for quantum computation was overtaken by other architectures. Here, we
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