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Events

SITP Seminar climate meeting

Moderator: Jonathan Sorce
The SITP climate meeting is a quarterly town hall for discussing issues related to the social atmosphere of SITP. Social factors, such as the quality of relationships between junior and senior students or between students and faculty, play a big role in each person's ability to succeed in research. At this meeting, we will briefly check in on the progress of action items we came up with at our last meeting, then open the floor to a general discussion on SITP climate. The idea is to treat positive community interactions in SITP as a goal that we should think about actively and work toward collectively, rather than something that we assume will happen naturally without any effort. The meeting should be informal and friendly: please come with constructive attitudes and a good-faith interest in making SITP a great place to work.

Qubit Group meet

Fall quarter kickoff

We'll ask everyone to introduce themselves and take a few minutes to say something about a project they are working on, or have recently finished, and something else they find interesting and would like to learn about.  Incoming grad students could mention something about an undergrad research project they've been involved in if they'd like.

Q-FARM Seminar presents "Scaling-up single-photon quantum hardware towards quantum-information processing with a quantum advantage "

Peter Lodahl (Center for Hybrid Quantum Networks (Hy-Q), Niels Bohr Institute, University of Copenhagen, Denmark)

Semiconductor quantum dots embedded in photonic nanostructures offer a highly efficient and coherent deterministic photon-emitter interface [1]. It constitutes an on-demand single-photon source for quantum-information applications, enables single-photon nonlinear, optics and the constructing of deterministic quantum gates for photons [2]. We review recent experimental progress, and demonstrate that the current technology can be scaled up to reach quantum advantage [3] with the demonstration of near-transform-limited emitters in high-cooperativity planar nanophotonic waveguides [4]. The coherent control of a single spin in the quantum dot [5, 6] offers additional opportunities of generating advanced multi-photon entangled states [7]. We finally discuss how this emergent hardware may be applied in a resource-efficient manner, e.g., for constructing a one-way quantum repeater [8].

 

References

 

[1] Lodahl et al., Rev. Mod. Phys. 87, 347 (2015).

[2] Lodahl, Quantum Science and Technology 3, 013001 (2018).
[3] Uppu et al., Arxiv: 2003.08919.

[4] Pedersen et al., ACS Photonics (2020).

[5] Javadi et al., Nature Nanotechnology 13, 398 (2018).

[6] Appel et al., Arxiv: 2006.15422.

[7] Tiurev et al., Arxiv: 2007.09295.

[8] Borregaard et al., Phys. Rev. X 10, 021071 (2020).

Peter Lodahl (PL) is professor in quantum physics and technology at the Niels Bohr Institute and Director of the Hybrid Quantum Networks Hy-Q Center of Excellence. PL received a PhD in quantum physics in 2000 from University of Copenhagen and subsequently held postdoc positions at Caltech and University of Twente. He was the first to demonstrate that light emission can be fully controlled by the use of intricate photonic nanostructures. This fundamental principle ultimately enables a full deterministic quantum interface between light and matter, which PL subsequently has exploited after founding his own research group in Denmark in 2005. His group develops fundamentally new quantum hardware for the emergent field of quantum-information science such as: deterministic single-photon sources, spin-photon interfaces, and photonic quantum gates. The application areas include quantum simulators, quantum repeaters, and quantum key distribution towards the ultimate vision of a quantum internet. 

 

PL is the recipient of the ERC consolidator grant (2010), ERC advanced grant (2015), and the EliteForsk Award for 2016. He has published >125 publications in leading scientific journals, given >150 invited colloquia and conference talks, holds 6 patents on photonic quantum technology, and has founded the quantum-tech start-up company Sparrow Quantum. He is an elected member of the Royal Danish Academy of Sciences and Letters. 

 

Condensed Matter Physics Seminar welcomes Michael Manfra

Michael Manfra (Purdue University)

- TBA -


Condensed Matter Physics (CMP) Seminars are every Thursday at 3:15PM PST. Details provided when they are available. Visit the Geballe Laboratory for Advanced Materials website for contact information.

View past CMP Seminars

Condensed Matter Physics Seminar welcomes Tarun Grover

Tarun Grover (University of California San Diego)

- TBA -


Condensed Matter Physics (CMP) Seminars are every Thursday at 3:15PM PST. Details provided when they are available. Visit the Geballe Laboratory for Advanced Materials website for contact information.

View past CMP Seminars