2024 CAP Congress / Congrès de l'ACP 2024

Session

(DQI) M1-6 Quantum System Engineering and Control | Ingénierie et contrôle des systèmes quantiques (DIQ)

M1-6

27 May 2024, 10:30

Western University

Conveners

(DQI) M1-6 Quantum System Engineering and Control | Ingénierie et contrôle des systèmes quantiques (DIQ)

• Olivia Di Matteo (TRIUMF)

4160. A photonic which-path entangler

Bill Coish (Department of Physics, McGill University)

27/05/2024, 10:30

Division for Quantum Information / Division de l'information quantique (DQI / DIQ)

Invited Speaker / Conférencier(ère) invité(e)

We show theoretically that a modulated longitudinal cavity-qubit coupling can be used to control the path taken by a multiphoton coherent-state wavepacket conditioned on the state of a qubit, resulting in a qubit-which-path (QWP) entangled state [1]. We further show that QWP states have a better potential sensitivity for quantum-enhanced phase measurements (characterized by the quantum Fisher...

4159. (G) Entropy-based Bayesian approach to multi-parameter estimation

Noah Pinkney

27/05/2024, 11:00

Division for Quantum Information / Division de l'information quantique (DQI / DIQ)

Oral not-in-competition (Graduate Student) / Orale non-compétitive (Étudiant(e) du 2e ou 3e cycle)

We investigate and compare a number of different strategies for rapidly estimating the values of unknown Hamiltonian parameters of a quantum system. Rapid and accurate Hamiltonian parameter estimation has applications in quantum sensing, quantum control, and quantum computing. We show that an adaptive Bayesian method based on minimizing the Shannon entropy in each shot of a measurement...

4280. (G*) Engineering non-Gaussian bosonic gate by quantum signal processing

Pak Tik Fong (Simon Fraser University)

27/05/2024, 11:15

Division for Quantum Information / Division de l'information quantique (DQI / DIQ)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Non-Gaussian operations are essential for most bosonic quantum technologies. Yet, realizable non-Gaussian operations are rather limited in type and generally suffer from accuracy-duration tradeoffs. In this work, we propose to use quantum signal processing to engineer non-Gaussian operations. For systems dispersively coupled to an auxiliary qubit, our scheme can generate a new type of...

4278. (G*) Deterministic Construction of Arbitrary States in Permutationally-Invariant Spin Ensemble

Ruchir Tullu (Simon Fraser University)

27/05/2024, 11:30

Division for Quantum Information / Division de l'information quantique (DQI / DIQ)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Atomic and solid-state spin ensembles are promising quantum technological platforms, but practical architectures are incapable of resolving individual spins. The state of an unresolvable spin ensemble must obey the condition of permutational invariance, yet no method of generating general permutationally-invariant (PI) states is known. In this work, we develop a systematic strategy to generate...