2026 CAP Congress / Congrès de l'ACP 2026

Session

(DQI) T1-9 | (DIQ)

T1-9

23 Jun 2026, 10:15

U. Ottawa - Learning Crossroads (CRX) Building

981. Does the NPA hierarchy attain the commuting operator value at some finite level?

Prof. Connor Paddock (University of Calgary)

23/06/2026, 10:15

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

Invited Speaker / Conférencier(ère) invité(e)

The NPA hierarchy, of Navascues, Pironio, and Acin, is a widely used tool for analyzing nonlocality across a range of settings in quantum information science. In the context of nonlocal games, this hierarchy of semidefinite programs (SDPs) provides a (non-increasing) sequence of upper bounds, converging (in the limit) to the commuting operator value. In fact, a corollary of the landmark...

810. Logical Bell Inequalities, Magic States, and Lambda Polytopes

Sanchit Srivastava (Institute for Quantum Computing, University of Waterloo)

23/06/2026, 10:45

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

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

We investigate the role of logical Bell inequalities in identifying quantum states useful for magic state distillation. Our approach provides an alternative route to characterizing contextuality as a resource, entirely within the logical framework. In particular, we derive logical Bell inequalities that delineate the faces of the simulable polytope of a single qudit \textemdash the set of...

812. Generating bosonic code state with noisy ancilla

Thomas Lin (Simon Fraser University)

23/06/2026, 11:00

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

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

Quantum error correction (QEC) is essential for protecting quantum information from ubiquitous environmental noises. The Gottesman-Kitaev-Preskill (GKP) state is a particularly promising bosonic QEC code state that can protect the information encoded in an oscillator against dominant bosonic errors. Approximate GKP states can be generated by performing adaptive phase estimation with an ancilla...

554. Entanglement sharing schemes

Stanley Miao (Perimeter Institute for Theoretical Physics)

23/06/2026, 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)

We ask how quantum correlations can be distributed among many subsystems. To address this, we define entanglement sharing schemes (ESS) where certain pairs of subsystems allow entanglement to be recovered via local operations, while other pairs must not. ESS schemes come in two variants, one where the partner system with which entanglement should be prepared is known, and one where it is not....

626. Entanglement summoning

Lana Bozanic

23/06/2026, 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)

In an entanglement summoning task, a set of distributed, cooperating parties attempt to fulfill requests to prepare entanglement between distant locations. The parties share limited communication resources: timing constraints may require the entangled state to be prepared before some pairs of distant parties can communicate, and a restricted set of links in a quantum network may further...

884. Alice and Rob Revisited: How quantum reference frames can provide new insights into entanglement degradation

Everett Patterson (Dept. of Physics and Astronomy, University of Waterloo)

23/06/2026, 11:45

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

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

Relativistic Quantum Information (RQI) uses tools from quantum information theory to quantify physical phenomena at the interface between general relativity and quantum theory. An important result from RQI describes how a maximally entangled state shared by Alice and Rob is degraded when Rob undergoes uniform accelerated motion relative to Alice.
In this talk, I will revisit the problem of...