Forum 29.11
by William Schober
Hello everyone,
This Wednesday 29.11.2023 at 13:30 in room D5.01 we'll have a forum. The plan is to hear a double-feature: first an extended technical talk by Alberto (title and abstract below) followed by "an open floor on cryptography and crypto currencies: can technology be used -- and which -- to build a free society?", initiated and moderated by Stefan.
Anyone else who would like to speak afterward is welcome. It can be of any length on any subject, even something spontaneous -- we have the room for the whole afternoon.
Join us in person or online at https://meet.jit.si/CQISeminarTalks
Warm regards,
Will Schober
Title: classical Markov simulations of quantum processes and the reality of the wave-function.
Abstract: In this talk, I will consider classical Markov simulations of quantum processes and I will show that the state space of the simulation must contain a Hilbert space of the same dimension of the Hilbert space associated with the simulated quantum system and, furthermore the evolution is described by the same unitaries. In particular, this model of simulation must have an exponential computational complexity. The result is quite close to the pbr proof, but it uses a much milder hypothesis.
5 months
CQI seminar guest speaker: Matteo D'Anna
by William Schober
Hello everyone,
Next Wednesday 22.11.2023 at 15:30 in room D5.01 we're happy to welcome Matteo D'Anna from IRSOL/ETH as a guest speaker. Matteo will be telling us about some new algorithms for simulating a 1+1D model of QED, title and abstract below.
Join us in person or online at https://meet.jit.si/CQISeminarTalks
Warm regards,
Will Schober
Title: Digital quantum simulations of quantum electrodynamics
Abstract: Digital quantum simulations of gauge theories are an active field of research within the community of lattice simulations of gauge theories. I will focus on digital quantum simulations of the Schwinger Model with theta-term. This is a U(1) gauge theory which exhibits confinement, and by probing the system from the outside with two charged objects it is possible to observe an analogous process to string breaking. Placing the gauge theory on a lattice yield a discretized version that can be simulated on (quantum) computers.
I will present two techniques, one for estimating the eigenenergies of the lattice theory and another auxiliary algorithm for suppressing high-energy excitations. This two newly introduced algorithms combine to give very precise estimations for ground state energy both for the Schwinger Model and for the string breaking picture.
5 months, 2 weeks