Publications

Interfering trajectories in experimental quantum-enhanced stochastic simulation Nature Communications, 10, 1630)

In the 2018 movie Infinity War, a scene featured Dr. Strange looking into 14 million possible futures to search for a single timeline where the heroes would be victorious. Perhaps he would have had an easier time with help from a quantum computer. In with work, we worked with colleagues from Griffith university to constructed ... Read moreInterfering trajectories in experimental quantum-enhanced stochastic simulation Nature Communications, 10, 1630)

Operational resource theory of continuous-variable nonclassicality

Photons in the quantum realm behave very differently from the classical light experienced in our everyday lives. The concept of nonclassicality—one of the most influential ideas of twentieth-century quantum physics—draws a boundary between these two regimes. Nonclassical light is also a valuable resource, underpinning exciting technologies that exploit the peculiarities of quantum physics, including ultrasensitive ... Read moreOperational resource theory of continuous-variable nonclassicality

Geometry of quantum correlations in space-time (Phys. Rev. A 98, 052312)

One of the more interesting features of quantum mechanics is that correlations in space and correlation in time can be distinct. For example, if you have a Bell State, and measure each of the individual qubits in the Pauli Basis, you'll find that at most only two of the directions can be perfectly correlated - ... Read moreGeometry of quantum correlations in space-time (Phys. Rev. A 98, 052312)

Causal Asymmetry in a Quantum World (Phys. Rev. X 8, 0310)

The fundamental laws of physics work in the same way whether time moves forward or backward. Yet, while a glass can fall and scatter shards across the floor, glass shards never gather together and leap back onto the counter to form a complete glass. The source of this temporal asymmetry is one of the deepest ... Read moreCausal Asymmetry in a Quantum World (Phys. Rev. X 8, 0310)

Operational effects of the UNOT gate on classical and quantum correlations ( Science Bulletin 63, 12, 765-770)

The discrepancy communicating with parallel versus anti-parallel spins is one of the more surprising phenomena to arise in quantum theory.  That is, if Alice wants to send a direction to Bob. She can either send two spins pointing in this direction or one spin in this direction, while the other pointing in the diametric opposite. ... Read moreOperational effects of the UNOT gate on classical and quantum correlations ( Science Bulletin 63, 12, 765-770)

Practical Unitary Simulator for Non-Markovian Complex Processes (Phys. Rev. Lett. 120, 240502)

We knew that quantum mechanics can make correct future predictions by storing less information about the past, but how can these predictions be systematically generated? This was an important operational question, as we wanted to avoid situations where a quantum model requires only C bits of past information for predict at specific instances during prediction, ... Read morePractical Unitary Simulator for Non-Markovian Complex Processes (Phys. Rev. Lett. 120, 240502)

Optimal Classical Simulation of State-Independent Quantum Contextuality (Phys. Rev. Lett. 120, 130401)

Quantum contextuality describes a form of non-classicality where the output of a quantum measurement C depends on which quantum measure, A or B, were made before -- even when A and B both commute with C and thus should each not disturb the measurement statistics of C. This phenomenon, however, can be replicated by a ... Read moreOptimal Classical Simulation of State-Independent Quantum Contextuality (Phys. Rev. Lett. 120, 130401)

Superior memory efficiency of quantum devices for the simulation of continuous-time stochastic processes (npj Quantum Information 4,18)

The basic idea here is how do we model processes that emit outputs at continuous points in time? If the process is Markovian (like the spontaneous emission of radiation), then things are easy - as we don't need to track how much time has elapse. But as soon as events turn out to be non-Markovian, ... Read moreSuperior memory efficiency of quantum devices for the simulation of continuous-time stochastic processes (npj Quantum Information 4,18)

Unification of non-classicality measures in interferometry (Physical Review A 97, 1, 012331)

There has being a growing interesting in the various features of quantum mechanics that are distinctly non-classical, from entanglement to discord to more recent ideas of coherence. Could these various forms of non-classicality be understood in a unified operation framework? In this piece of we work, we propose a way to do this in the context ... Read moreUnification of non-classicality measures in interferometry (Physical Review A 97, 1, 012331)

Quantum plug n' play: modular computation in the quantum regime (New Journal of Physics, 20, 013004)

The idea here is plug n' play: how can one quantum computer call upon another to perform a subroutine - without assuming anything about how the second computer was physical constructed? This becomes a very important question as the world builds towards scalable quantum computing - where two different parties wishes to work together to ... Read moreQuantum plug n' play: modular computation in the quantum regime (New Journal of Physics, 20, 013004)