Introduction

• Koji Terashi (University of Tokyo (JP))

Room: Sanjo Conference Hall

Quantum acoustics

• Andrew Cleland (UChicago)

Room: Sanjo Conference Hall

Design of diamond optomechanical system for quantum transaction

• Masahito Nomura (UTokyo)

Room: Sanjo Conference Hall

Quantum Advantage and Robust Quantum Information Processing

• Liang Jiang (UChicago)

Room: Sanjo Conference Hall

Early Fault-tolerant Quantum Computing in Practice

• Nobuyuki Yoshioka

Room: Sanjo Conference Hall

Quantum sensing: Novel probes for sub-cellular processes

• Peter Maurer (UChicago)

Room: Sanjo Conference Hall

Quantum-ready single-particle platforms for biosensing

• Alison Squires (UChicago)

Room: Sanjo Conference Hall

Elucidating the unsolved biology of exosomes with quantum technology

• Keisuke Goda (UTokyo)

Room: Sanjo Conference Hall

Creating and integrating quantum states with semiconductors

• David Awschalom (UChicago)

Room: Sanjo Conference Hall

Development of magnetic field tolerant superconducting qubits

• Tatsumi Nitta (UTokyo)

Room: Sanjo Conference Hall

Pseudoentanglement

• Soumik Ghosh (UChicago)

Room: Sanjo Conference Hall In this talk we will discuss to what extent entanglement is a "feelable" (or efficiently observable) quantity of quantum systems. Inspired by recent work of Gheorghiu and Hoban, we define a new notion which we call "pseudoentanglement", which are ensembles of efficiently constructible quantum states which hide their entanglement entropy. We show such states exist in the strongest form possible while simultaneously being pseudorandom states. Consequently, we prove that there is no efficient algorithm for measuring the entanglement of an unknown quantum state, under standard cryptographic assumptions. We will talk about applications of this construction to diverse areas of physics and computer science.

Mechanical control of a single nuclear spin in diamond

• Benjamin Pingault (UChicago)

Room: Sanjo Conference Hall Nuclear spins interact weakly with their environment and therefore exhibit long coherence times. This has led to their use as memory qubits in quantum information platforms, where they are controlled via electromagnetic waves. Scaling up such platforms comes with challenges in terms of power efficiency, as well as cross-talk between devices. Here, we demonstrate coherent control of a single nuclear spin using surface acoustic waves. We use mechanically driven Ramsey and spin-echo sequences to show that the nuclear spin retains its excellent coherence properties. We estimate that this approach requires 2–3 orders of magnitude less power than more conventional control methods. Furthermore, this technique is scalable because of the possibility of guiding acoustic waves and reduced cross-talk between different acoustic channels. This work demonstrates the use of mechanical waves for complex quantum control sequences, offers an advantageous alternative to the standard electromagnetic control of nuclear spins, and opens prospects for incorporating nuclear spins in mechanically interfaced hybrid quantum architectures.

Have we seen a demonstration of experimental quantum advantage?

• Bill Fefferman (UChicago)

Room: Sanjo Conference Hall

Tensor network and quantum computation

• Synge Todo (UTokyo)

Room: Sanjo Conference Hall

State tomography and Persistent coherence of magnetization

• Eiji Saito (UTokyo)

Room: Sanjo Conference Hall We have developed two spectroscopic methods: Magnetization State Tomography, which measures the Wigner function of magnetization fluctuations, and Magnetization Parametric Projection Measurement, which selectively amplifies the phase information of magnetization. As applications of these methods, we introduce the realization of magnetization squeezing, the direct measurement of magnetization parametric oscillation, and the discovery of hidden coherence in magnetization.

Poster session Room: Sanjo Conference Hall

Discussion Room: Sanjo Conference Hall

Concluding Room: Sanjo Conference Hall