aspuru-list February 2020

aspuru-list@lists.fas.harvard.edu

2 participants
7 discussions

[Aspuru-Guzik Group List] [qip] meeting tomorrow

by Aram Harrow

Dear quanta, We will meet in the usual time and place (6-310, 11am). Cole Franks from the math dept will tell us about his recent paper which uses quantum expanders to solve a problem in statistics. https://arxiv.org/abs/2002.00071 -aram _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

4 years, 1 month

[Aspuru-Guzik Group List] [qip] group meeting tomorrow

by Aram Harrow

Dear quanta, We will meet tomorrow at the usual time and place (6-310, 11am). Rolando will tell us about his recent work on extractors. -aram _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

4 years, 2 months

[Aspuru-Guzik Group List] FW: CMSA Colloquium, February 19: Peter Shor (MIT)

by Ploucha, Clare

Dear all, Please see below for a talk that may be of interest to the HQI community. Best, Clare ---------- Forwarded message --------- From: Sergiy Verstyuk <verstyuk(a)cmsa.fas.harvard.edu<mailto:verstyuk@cmsa.fas.harvard.edu>> Date: Fri, Feb 14, 2020 at 4:03 PM Subject: CMSA Colloquium, February 19: Peter Shor (MIT) To: Sergiy Verstyuk <verstyuk(a)cmsa.fas.harvard.edu<mailto:verstyuk@cmsa.fas.harvard.edu>> Speaker: Peter Shor (MIT) Time: February 19, Wednesday, 16:30-17:30 Location: CMSA building, 20 Garden Street, Room G10<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.google.com_maps_se…> Title: Quantum Money from Lattices Abstract: Quantum money is a cryptographic protocol for quantum computers. A quantum money protocol consists of a quantum state which can be created (by the mint) and verified (by anybody with a quantum computer who knows what the "serial number" of the money is), but which cannot be duplicated, even by somebody with a copy of the quantum state who knows the verification protocol. Several previous proposals have been made for quantum money protocols. We will discuss the history of quantum money and give a protocol which cannot be broken unless lattice cryptosystems are insecure. ***Please distribute among your colleagues***

4 years, 2 months

[Aspuru-Guzik Group List] Friday, February 14: Quantum Postdoc Symposium

by Ploucha, Clare

Dear HQI and MPHQ Communities, Tomorrow, several candidates for postdoctoral fellowships in quantum science and engineering will visit Harvard to give talks and meet with PIs and their groups. Please see below for the schedule of speakers. Jefferson 356 (9:00-10:20 AM) Condensed Matter Theory 9:00am: Rufus Boyack (University of Alberta) 9:40am: Jon Curtis (UMD) Jefferson 250 (12:00-4:30pm) Experimentalists 12:00pm: Thomas Schweigler (TU Wien) 12:40pm: Ivana Dimitrova (MIT) 1:20pm: Wenhan Dai (MIT) [BREAK] AMO Theory 2:30pm: Menghzhen Zhang (Yale) 3:10pm: Stefan Ostermann (Univ. Innsbruck) 3:40pm: Victor Albert (Caltech)

4 years, 2 months

[Aspuru-Guzik Group List] [qip] group meeting tomorrow

by Aram Harrow

Dear quanta, We will meet tomorrow at the usual time and place (6-310, 11am). Shreya Vardhan will tell us about her recent work on entanglement and correlations in random unitary circuits, based on https://arxiv.org/abs/1912.08918 and work in progress. -aram _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

4 years, 2 months

[Aspuru-Guzik Group List] [qip] group meeting and talk today

by Aram Harrow

Dear quanta, A reminder that we will meet in room 6-310 at 11am for our group meeting, where David Shukur will tell us about quasiprobabilities, and then at 1:30pm we will have a talk in 6C-442 by Soonwon Choi (info below). --- Soonwon Choi, Berkeley Friday, February 7. 1:30 pm. 6C-442 (Cosman Room) Title: Phase transitions in the dynamics of quantum information Abstract: Quantum information science seeks to understand and control quantum systems with high entanglement and complexity, defining a new frontier of physics. In this talk, we discuss a novel phenomenon that arises in this regime: a phase transition in the dynamics of quantum entanglement and information. We consider a generic quantum many-body system coupled to a noisy environment, which we model with random unitary circuits interspersed by projective measurements. The interplay between unitary evolution and measurements leads to a phase transition: at high measurement rates, any coherent information in the system is completely lost, while at sufficiently low rates, an extensive amount of information is robustly protected. The nature of the phase transition can be understood from two complementary perspectives: firstly, by using the quantum error-correcting properties of scrambling unitary dynamics; and secondly, by using a mapping to ordering transitions in classical statistical mechanics. The implications of our work for on-going experiments as well as for broad future research directions will be discussed. _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

4 years, 2 months

[Aspuru-Guzik Group List] [qip] group meeting and two talks

by Aram Harrow

Dear quanta, We will have group meeting tomorrow at the usual time and place. Besides Scott's talk today at 4, there are two others that should be of interest to the group: tomorrow and Monday, both at 1:30pm in 6C-442. === Soonwon Choi, Berkeley Friday, February 7. 1:30 pm. 6C-442 (Cosman Room) Title: Phase transitions in the dynamics of quantum information Abstract: Quantum information science seeks to understand and control quantum systems with high entanglement and complexity, defining a new frontier of physics. In this talk, we discuss a novel phenomenon that arises in this regime: a phase transition in the dynamics of quantum entanglement and information. We consider a generic quantum many-body system coupled to a noisy environment, which we model with random unitary circuits interspersed by projective measurements. The interplay between unitary evolution and measurements leads to a phase transition: at high measurement rates, any coherent information in the system is completely lost, while at sufficiently low rates, an extensive amount of information is robustly protected. The nature of the phase transition can be understood from two complementary perspectives: firstly, by using the quantum error-correcting properties of scrambling unitary dynamics; and secondly, by using a mapping to ordering transitions in classical statistical mechanics. The implications of our work for on-going experiments as well as for broad future research directions will be discussed. ==== Guang Hao Low, Microsoft Monday, February 10, 1:30 pm. 6C-442 (Cosman Room) Title: Probing strongly correlated systems: Towards a quantum computational advantage Abstract: The properties of strongly correlated systems are of great interest but have often been challenging to elucidate. Some of these difficulties may be overcome by programmable digital quantum computers, which harness the quantum-mechanical nature of reality to simulate quantum systems and promise an advantage over computers rooted in classical physics. In this talk, I review developments in quantum algorithms advancing this goal, highlight the key role of physical insight such as the interaction picture and the finite speed of light driving recent progress, and point towards further challenges in quantum computation as a tool for fundamental physics. _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip

4 years, 2 months

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aspuru-list February 2020