366 citations · 4.3k across the 92 of their papers we have counts for
66 papers · 1 filter
Unifying Collective Effects in Emission, Absorption, and Transfer
Adesh Kushwaha, Erik M. Gauger, Ivan Kassal
Collective effects, such as superradiance and subradiance are central to emerging quantum technologies -- from sensing to energy storage -- and play an important role in light-harv…
Discovery of energy landscapes towards optimized quantum transport: Environmental effects and long-range tunneling
Maggie Lawrence, Matthew Pocrnic, Erin Fung +3
Carrier transport in quantum networks is governed by a variety of factors, including network dimensionality and connectivity, on-site energies, couplings between sites and whether…
A multi-dimensional quantum estimation and model learning framework based on variational Bayesian inference
Federico Belliardo, Erik M. Gauger, Tim H. Taminiau +2
The advancement and scaling of quantum technology has made the learning and identification of quantum systems and devices in highly-multidimensional parameter spaces a pressing tas…
Learning the dynamics of Markovian open quantum systems from experimental data
Stewart Wallace, Yoann Altmann, Brian D. Gerardot +2
We present a Bayesian algorithm to identify generators of open quantum system dynamics, described by a Lindblad master equation, that are compatible with measured experimental data…
Influence of strong molecular vibrations on decoherence of molecular polaritons
Dominic M Rouse, Erik M Gauger, Brendon W Lovett
We derive the transition rates, dephasing rates, and Lamb shifts for a system consisting of many molecules collectively coupled to a resonant cavity mode. Using a variational polar…
ACE: A general-purpose non-Markovian open quantum systems simulation toolkit based on process tensors
Moritz Cygorek, Erik M. Gauger
We describe a general-purpose computational toolkit for simulating open quantum systems, which provides numerically exact solutions for composites of zero-dimensional quantum syste…
Tree-like process tensor contraction for automated compression of environments
Moritz Cygorek, Brendon W. Lovett, Jonathan Keeling +1
The algorithm "automated compression of environments" (ACE) [Nat. Phys. 18, 662 (2022)] provides a versatile way of simulating an extremely broad class of open quantum systems. Thi…
Understanding and utilizing the inner bonds of process tensors
Moritz Cygorek, Erik M. Gauger
Process tensor matrix product operators (PT-MPOs) enable numerically exact simulations for an unprecedentedly broad range of open quantum systems. By representing environment influ…
The role of polaron dressing in superradiant emission dynamics
Julian Wiercinski, Moritz Cygorek, Erik M. Gauger
Cooperative effects of multiple quantum emitters are characterized by transitions via delocalized collective states with altered emission properties due to the existence of inter-e…
Differentiable master equation solver for quantum device characterisation
David L. Craig, Natalia Ares, Erik M. Gauger
Differentiable models of physical systems provide a powerful platform for gradient-based algorithms, with particular impact on parameter estimation and optimal control. Quantum sys…
Sublinear scaling in non-Markovian open quantum systems simulations
Moritz Cygorek, Jonathan Keeling, Brendon W. Lovett +1
While several numerical techniques are available for predicting the dynamics of non-Markovian open quantum systems, most struggle with simulations for very long memory and propagat…
From Goldilocks to Twin Peaks: multiple optimal regimes for quantum transport in disordered networks
Alexandre R. Coates, Brendon W. Lovett, Erik M Gauger
Understanding energy transport in quantum systems is crucial for an understanding of light-harvesting in nature, and for the creation of new quantum technologies. Open quantum syst…
Real-time adaptive estimation of decoherence timescales for a single qubit
Muhammad Junaid Arshad, Christiaan Bekker, Ben Haylock +12
Characterising the time over which quantum coherence survives is critical for any implementation of quantum bits, memories and sensors. The usual method for determining a quantum s…
Strong coupling, weak impact: Phonon coupling versus pure dephasing in the photon statistics of cooperative emitters
Julian Wiercinski, Erik M. Gauger, Moritz Cygorek
Realising scalable quantum networks requires a meticulous level of understanding and mitigating the deleterious effects of decoherence. Many quantum device platforms feature multip…
Signatures of cooperative emission in photon coincidence: Superradiance versus measurement-induced cooperativity
Moritz Cygorek, Eleanor D. Scerri, Ted S. Santana +3
Indistinguishable quantum emitters confined to length scales smaller than the wavelength of the light become superradiant. Compared to uncorrelated and distinguishable emitters, su…
Learning Quantum Systems
Valentin Gebhart, Raffaele Santagati, Antonio Andrea Gentile +7
The future development of quantum technologies relies on creating and manipulating quantum systems of increasing complexity, with key applications in computation, simulation and se…
Eliminating radiative losses in long-range exciton transport
Scott Davidson, Felix A. Pollock, Erik M. Gauger
We demonstrate that it is possible to effectively eliminate radiative losses during excitonic energy transport in systems with an intrinsic energy gradient. By considering chain-li…
A quantum model of lasing without inversion
Nicholas Werren, Erik Gauger, Peter Kirton
Starting from a quantum description of multiple Lambda-type 3-level atoms driven with a coherent microwave field and incoherent optical pumping, we derive a microscopic model of la…
An analytic expression for the optical exciton transition rates in the polaron frame
Dominic M Rouse, Erik M Gauger, Brendon W Lovett
When an optical emitter is strongly coupled to a vibrational bath the polaron transformation is often used to permit an accurate second-order Redfield master equation. However, the…
Exact dynamics of non-additive environments in non-Markovian open quantum systems
Dominic Gribben, Dominic M. Rouse, Jake Iles-Smith +6
When a quantum system couples strongly to multiple baths then it is generally no longer possible to describe the resulting system dynamics by simply adding the individual effects o…
Quantum microscopy based on Hong-Ou-Mandel interference
Bienvenu Ndagano, Hugo Defienne, Dominic Branford +5
Hong-Ou-Mandel (HOM) interference, the bunching of indistinguishable photons at a beam splitter, is a staple of quantum optics and lies at the heart of many quantum sensing approac…
Localisation determines the optimal noise rate for quantum transport
Alexandre R. Coates, Brendon W. Lovett, Erik M. Gauger
Environmental noise plays a key role in determining the efficiency of transport in quantum systems. However, disorder and localisation alter the impact of such noise on energy tran…
Coherence in Cooperative Photon Emission from Indistinguishable Quantum Emitters
Zhe Xian Koong, Moritz Cygorek, Eleanor Scerri +5
Photon-mediated interactions between atomic systems can arise via coupling to a common electromagnetic mode or by quantum interference. Here, we probe the role of coherence in coop…
Numerically exact open quantum systems simulations for arbitrary environments using automated compression of environments
Moritz Cygorek, Michael Cosacchi, Alexei Vagov +4
The central challenge for describing the dynamics in open quantum systems is that the Hilbert space of typical environments is too large to be treated exactly. In some cases, such…