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Superexchange Liquefaction of Strongly Correlated Lattice Dipolar Bosons

We propose a mechanism for liquid formation in strongly correlated lattice systems. The mechanism is based on an interplay between long-range attraction and superexchange processes. more

NISQ-Computer: Quantum entanglement can be a double-edged sword

Theorists at MPQ have investigated the effects of error propagation on the quality of computations of classical optimisation problems on NISQ computers in a recent work. more

Oh, come, all ye quantum theorists! - Christmas party of the Theory Division

With a rich buffet of homemade savory and sweet dishes, the MPQ Theory Division celebrated its annual Christmas party on December 1, 2022. more

Anomalous Behaviors of Quantum Emitters in Non-Hermitian Baths

Both non-Hermitian systems and the behavior of emitters coupled to structured baths have been studied intensely in recent years. Here, we study the interplay of these paradigmatic settings. more

Group Workshop 2022 in Austria

Group Workshop 2022 in Austria

November 16, 2022

The 2022 edition of the theory group workshop took place from October 17 to October 19 in the beautiful town of Umhausen in Ötztal, Austria. After a two year long hiatus, the group got together for three days packed with captivating talks and engaging discussions. more

Light cone tensor network and time evolution

The transverse folding algorithm [M. C. Bañuls et al., Phys. Rev. Lett. 102, 240603 (2009)] is a tensor network method to compute time-dependent local observables in out-of-equilibrium quantum spin chains that can overcome the limitations of matrix product states when entanglement grows slower in the time than in the space direction. We present a contraction strategy that makes use of the exact light cone structure of the tensor network representing the observables. more

Spin-Controlled Quantum Interference of Levitated Nanorotors

We describe how to prepare an electrically levitated nanodiamond in a superposition of orientations via microwave driving of a single embedded nitrogen-vacancy (NV) center. more

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