Exponential Error Suppression for Near-Term Quantum Devices
NetSquid, a discrete-event simulation platform for quantum networks
Nuclear astrophysics in the era of high precision astrophysics - an experimentalist's view
Based on the progress of the last almost 100 years, it has become common knowledge that nuclear reactions are responsible for the energy generation of stars as well as for the synthesis of chemical elements building up our universe. Moreover, the nuclear physics background of astrophysical processes is relatively well understood. On the other hand, in the 21th century astrophysical observations and astrophysical models reached unprecedented precision. Consequently, the knowledge of nuclear reactions taking place in various astrophysical events is often not good enough, which represents the highest uncertainty of the models.
Experimental and theoretical study of nuclear reactions of astrophysical relevance is therefore highly needed. In this talk I will use some examples to illustrate the difficulties and methods of experimental nuclear astrophysics in trying to fulfill the needs of high precision astrophysics.
Entanglement transition from continuous quantum measurements
Byzantine Fault Tolerance using Entangled Quantum States
Scanning spacetime with patterns of entanglement
Local Measurements of Interacting Electronic Matter in Magic Angle Graphene
About the speaker: Prof. Shahal Ilani is a world-leading expert and principal investigator in experimental condensed-matter physics. His lab have developed ultra-clean and highly-controllable carbon-based quantum devices, using those for studying the physics of electrons and nano-mechanics in low dimensions, and as unique scanning probes for visualizing the physics of materials in ways that were previously inaccessible. Shahal has been the recipient of multiple ERC Grants. If you ever wanted to take a virtual 3D tour in a quantum research lab, the Ilani lab provides you with an opportunity: https://www.ilanigroup.com/lab-tour
Fermion Sampling: merging the strengths of Random Circuit Sampling and Boson Sampling
In this talk, we present a quantum advantage scheme which is a fermionic analogue of Boson Sampling. This scheme, called Fermion Sampling, uses fermionic linear optical operations together with magic input states. On the one hand side, we provide hardness guarantees for this scheme which is at a comparable level to that of the state-of-the-art hardness guarantees for Random Circuit Sampling, surpassing that of Boson Sampling. On the other hand, we argue that one might perhaps even construct practically useful sampling schemes based on Fermion Sampling similarly to those constructed based Boson Sampling. Finally, we discuss the experimental feasibility of our scheme.
Non-local emergent hydrodynamics in a long-range quantum spin system
Generic short-range interacting quantum systems with a conserved quantity exhibit universal diffusive transport at late times. We show how this universality is replaced by a more general superdiffusive transport process in the presence of long-range interactions, decaying algebraically with distance. While diffusive behavior is recovered for a sufficiently fast decay, longer-ranged couplings give rise to an effective classical Levy flight, a random walk with step sizes following a heavy-tailed distribution. We study this phenomenon in a long-range interacting XY spin chain with conserved total magnetization, at infinite temperature. We investigate the dynamics by employing non-equilibrium quantum field theory and semi-classical phase space simulations. We find that the space-time dependent spin density profiles are self-similar, and show superdiffusive spreading, with scaling functions given by the stable symmetric distributions. We also extract the associated generalized diffusion constant, and demonstrate that it follows the prediction of classical Levy flights; quantum many-body effects manifest themselves in an overall time scale depending only weakly on the precise form of the algebraic long-range interaction. Our findings can be readily verified with current trapped ion experiments.