Veranstaltungs-Archiv 2022

Veranstaltungs-Archiv 2022

Ort: Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle (Saale)
Addressing the future needs of computing and energy will require radical advances in materials. This workshop will explore the latest theoretical advances in understanding and predicting novel phenomena, such as effects that exhibit extraordinary quantum, electronic, magnetic, optical, topological, or emergent properties, that can lead to transformational materials for computing and energy. [mehr]
There’s been tremendous progress in theory and experiment of quantum networks as a means of distributing quantum information over long distances. This talk will focus on one approach, based on quantum memories encoded in spins and coupled to photons via color centers in diamond. From large datasets of such color centers -- silicon vacancy and tin-vacancy defects in particular -- it is clear that the inhomogeneous distribution of optical transitions can be reliably kept below ~ 10 GHz, and that within this distribution there is no significant correlation with spin coherence properties. This invites protocols tailored to take advantage of this spectral distribution for wavelength division multiplexed addressing. To this end, we will discuss a new scheme for optical entanglement distribution in quantum networks based on a near-deterministic entangled photon pair source. By combining heralded photonic Bell pair generation with spectral mode conversion to interface with quantum memories, the scheme eliminates switching losses due to multiplexing. We analyze this approach for the particularly challenging problem of long-baseline entanglement distribution via satellites and ground-based memories, where it unlocks additional advantages: (i) the substantially higher atmospheric transmission η of down-links vs. uplinks with realistic adaptive optics, and (ii) photon loss occurring before interaction with the quantum memory – i.e., Alice and Bob receiving rather than transmitting – reduces memory requirements by O(η). [mehr]

Carbon-based nanoscience

Seminar

(Towards) superconducting spintronics

Computational studies of spintronics materials for energy-efficient electronic devices

Seminar

Integrated nonlinear optics and inverse-designed multimode photonics

Magnetic proximity effect as a pathway to superconducting spintronic

Seminar

Quantum quipus

Seminar

Exploring the antiferromagnetic ground states and domain walls of Mn on Ir(111) by SP-STM

Seminar

Unveiling novel temperature scales at the surfaces of 4f materials by ARPES measurements

Seminar
Zur Redakteursansicht