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Entanglement and purification transitions in non-Hermitian quantum mechanics
Sarang Gopalakrishnan, Michael J. Gullans
A quantum system subject to continuous measurement and post-selection evolves according to a non-Hermitian Hamiltonian. We show that, as one increases the rate of post-selection, t…
Resonant enhancement of three-body loss between strongly interacting photons
Marcin Kalinowski, Yidan Wang, Przemyslaw Bienias +7
Rydberg polaritons provide an example of a rare type of system where three-body interactions can be as strong or even stronger than two-body interactions. The three-body interactio…
Quantum coding with low-depth random circuits
Michael J. Gullans, Stefan Krastanov, David A. Huse +2
Random quantum circuits have played a central role in establishing the computational advantages of near-term quantum computers over their conventional counterparts. Here, we use en…
Tunable three-body loss in a nonlinear Rydberg medium
Dalia P. Ornelas Huerta, Przemyslaw Bienias, Alexander N. Craddock +7
Long-range Rydberg interactions, in combination with electromagnetically induced transparency (EIT), give rise to strongly interacting photons where the strength, sign, and form of…
Maximum refractive index of an atomic medium
Francesco Andreoli, Michael J. Gullans, Alexander A. High +2
It is interesting to observe that all optical materials with a positive refractive index have a value of index that is of order unity. Surprisingly, though, a deep understanding of…
Entanglement phase transitions in measurement-only dynamics
Matteo Ippoliti, Michael J. Gullans, Sarang Gopalakrishnan +2
Unitary circuits subject to repeated projective measurements can undergo an entanglement phase transition (EPT) as a function of the measurement rate. This transition is generally…