130 citations · 995 across the 59 of their papers we have counts for
59 papers
Tensor network methods for non-perturbative dynamics of open quantum systems
Thibaut Lacroix, Adam Burgess, Nicola Lorenzoni +11
The description of open quantum system dynamics beyond the perturbative treatment (usually associated with Markovian master equations) is a computationally challenging task due to…
Factorization rule for multitime correlations in non-Markovian open quantum systems
Thomas K. Bracht, Moritz Cygorek
Experiments performed on quantum systems often measure multitime correlation functions. When quantum systems are weakly coupled to their environment, the time evolution of such cor…
Fermionic versus Spin Baths in non-Interacting Transport Models
Muhammad Zia, Moritz Cygorek, Erik M. Gauger +1
We investigate how fermionic anticommutation shapes transport in a noninteracting resonant-level model where a single central site is coupled to an environment. To this end, we com…
Generation and manipulation of photon number wave packets in photonic cavities
Luca Nimmesgern, Moritz Cygorek, Doris E. Reiter +1
Quantum emitters inside optical cavities can create not only fixed photon number states but also photon number wave packets, which are states with a finite photon number distributi…
Time-nonlocal versus time-local long-time extrapolation of non-Markovian quantum dynamics
Moritz Cygorek, Erik M. Gauger
The high numerical demands for simulating non-Markovian open quantum systems motivate a line of research where short-time dynamical maps are extrapolated to predict long-time behav…
Optical signatures of coherence in molecular dimers
Priyankar Banerjee, Adam Burgess, Julian Wiercinski +2
We calculate experimentally measurable signatures of quantum correlations in a coupled molecular dimer that strongly interacts with its vibrational environment. We investigate inte…
Long-term stable nonlinear evolutions of ultracompact black-hole mimickers
Gareth Arturo Marks, Seppe J. Staelens, Tamara Evstafyeva +1
We study the stability of ultracompact boson stars admitting light rings combining a perturbative analysis with 3+1 numerical-relativity simulations with and without symmetry assum…
Photon Number Coherence in Quantum Dot-Cavity Systems can be Enhanced by Phonons
Paul C. A. Hagen, Mathieu Bozzio, Moritz Cygorek +2
Semiconductor quantum dots are a versatile source of single photons with tunable properties to be used in quantum-cryptographic applications. A crucial figure of merit of the emitt…
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…
Theory of time-bin entangled photons from quantum emitters
Thomas K. Bracht, Florian Kappe, Moritz Cygorek +6
Entangled photon pairs form the foundation for many applications in the realm of quantum communication. For fiber-optic transfer of entangled photon pairs, time-bin encoding can po…
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…
All-optical ultrafast arbitrary rotation of hole orbital qubits with direct phase control
Jun-Yong Yan, Liang Zhai, Hans-Georg Babin +10
Complete quantum control of a stationary quantum bit embedded in a quantum emitter is crucial for photonic quantum information technologies. Recently, the orbital degree of freedom…
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…
Multiple wave packets running in the photon number-space
Luca Nimmesgern, Moritz Cygorek, Adam Mielnik-Pyszczorski +3
If a two-level system coupled to a single-mode cavity is strongly driven by an external laser, instead of a continuous accumulation of photons in the cavity, oscillations in the me…
Temperature-independent almost perfect photon entanglement from quantum dots via the SUPER scheme
Thomas K. Bracht, Moritz Cygorek, Tim Seidelmann +2
Entangled photon pairs are essential for quantum communication technology. They can be generated on-demand by semiconductor quantum dots, but several mechanisms are known to reduce…
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…
Two-photon excitation with finite pulses unlocks pure dephasing-induced degradation of entangled photons emitted by quantum dots
Tim Seidelmann, Thomas K. Bracht, Barbara Ursula Lehner +7
Semiconductor quantum dots have emerged as an especially promising platform for the generation of polarization-entangled photon pairs. However, it was demonstrated recently that th…
Coherent control of a high-orbital hole in a semiconductor quantum dot
Jun-Yong Yan, Chen Chen, Xiao-Dong Zhang +14
Coherently driven semiconductor quantum dots are one of the most promising platforms for non-classical light sources and quantum logic gates which form the foundation of photonic q…
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…
Phonon-induced transition between entangled and nonentangled photon emission in constantly driven quantum-dot--cavity systems
Tim Seidelmann, Michael Cosacchi, Moritz Cygorek +3
Entangled photon pairs are essential for many applications in quantum technologies. Recent theoretical studies demonstrated that different types of entangled Bell states can be cre…
Quantum simulator of extended bipartite Hubbard model with broken sublattice symmetry: magnetism, correlations, and phase transitions
Yasser Saleem, Amintor Dusko, Moritz Cygorek +2
We describe here a quantum simulator of extended bipartite Hubbard model with broken sublattice symmetry. The simulator consists of a structured lateral gate confining two dimensio…
Swing-up of quantum emitter population using detuned pulses
Thomas K. Bracht, Michael Cosacchi, Tim Seidelmann +5
The controlled preparation of the excited state in a quantum emitter is a prerequisite for its usage as single-photon sources - a key building block for quantum technologies. In th…