Quantum Information in Spain ICE-8

Session

Session 3.1

May 30, 2023, 9:00 AM

Aula Magna

Conveners

Session 3.1

• Chair: Georgy Kornakov (Warsaw University of Technology (PL))

Session 3.1

• Chair: Antía Lamas (AWS)

121. Exploring quantum spin models with Rydberg atom arrays

Daniel Barredo

5/30/23, 9:00 AM

Rydberg atoms in arrays of optical tweezers offer a new perspective for quantum simulation of many body problems. In this talk, I will give a brief overview about this platform and describe our efforts to control Rydberg interactions to explore different types of spin Hamiltonians. I will report on our recent implementations of the 2D Ising Hamiltonian [1] and the dipolar XY model [2] with...

22. Quantum metrology with non-Gaussian spin states

Manuel Gessner (Universidad de Valencia, IFIC)

5/30/23, 9:50 AM

Talk

The well-known spin squeezing coefficient efficiently quantifies the sensitivity and entanglement of Gaussian states [1,2]. However, this coefficient is insufficient to characterize the much wider class of non-Gaussian quantum states that can generate even larger sensitivity gains. In this talk, we present a non-Gaussian extension of spin squeezing based on reduced variances of nonlinear...

5. Bounding the Minimum Time of a Quantum Measurement

Federico Centrone

5/30/23, 10:20 AM

Talk

Measurements take a singular role in quantum theory. While they are often idealized as an instantaneous process, this is in conflict with all other physical processes in nature. Here, we adopt a standpoint where the interaction with an environment is a crucial ingredient for the occurrence of a measurement. Within this framework, we derive a general lower bound on the time needed for a...

117. Towards large-scale quantum processors based on hole spin qubits

Cécile Yu (QuTech/TU Delft)

5/31/23, 9:00 AM

Invited

In recent years, hole spins in silicon and germanium have attracted increasing interest for quantum information processing. In this talk, I will describe recent advances in hole spin qubits for both silicon and germanium towards intermediate- or large-scale quantum processors.
First, I will present the coherent interaction of a hole spin in silicon with a microwave photon. This coupling...

32. Out-of-equilibrium evolution and tensor networks

LUCA TAGLIACOZZO (IFF-CSIC)

5/31/23, 9:50 AM

Talk

I will review the recent advances of TN algorithms that allow to compute the out-of-equilibrium dynamics of local observables after a quantum quench and discuss entropies, generalized entropies and coherence of the states generated.

23. Digitized Counter-Diabatic Quantum Algorithms

Dr Xi Chen (University of the Basque Country)

5/31/23, 10:20 AM

Talk

Shortcuts to adiabaticity [1] are well-known methods for controlling the quantum dynamics beyond the adiabatic criteria, where counter-diabatic (CD) driving provides a promising means to speed up quantum many-body systems. In this talk, we show the applicability of CD driving to enhance the digitized adiabatic quantum computing paradigm in terms of fidelity and total simulation time. Firstly,...