220 citations · 879 across the 12 of their papers we have counts for
11 papers
Non-perturbative switching rates in bistable open quantum systems: from driven Kerr oscillators to dissipative cat qubits
Léon Carde, Ronan Gautier, Nicolas Didier +3
In this work, we use path integral techniques to predict the switching rate in a single-mode bistable open quantum system. While analytical expressions are well-known to be accessi…
Inhomogeneous Quantum Quenches of Conformal Field Theory with Boundaries
Xinyu Liu, Alexander McDonald, Tokiro Numasawa +2
We develop a method to calculate generic time-dependent correlation functions for inhomogeneous quantum quenches in (1+1)-dimensional conformal field theory (CFT) induced by sudden…
Entanglement phase transition due to reciprocity breaking without measurement or post-selection
Gideon Lee, Tony Jin, Yu-Xin Wang +2
Despite its fully unitary dynamics, the bosonic Kitaev chain (BKC) displays key hallmarks of non-Hermitian physics including non-reciprocal transport and the non-Hermitian skin eff…
Third quantization of open quantum systems: new dissipative symmetries and connections to phase-space and Keldysh field theory formulations
Alexander McDonald, Aashish A. Clerk
The connections between standard theoretical tools used to study open quantum systems can sometimes seem opaque. Whether it is a Lindblad master equation, the equation of motion fo…
Anomalously large relaxation times in dissipative lattice models beyond the non-Hermitian skin effect
Gideon Lee, Alexander McDonald, Aashish Clerk
We show for generic quantum non-Hermitian tight-binding models that relaxation timescales of local observables are not controlled by the localization length associate…
Exact solutions of interacting dissipative systems via weak symmetries
Alexander McDonald, Aashish A. Clerk
We demonstrate how the presence of continuous weak symmetry can be used to analytically diagonalize the Liouvillian of a class Markovian dissipative systems with arbitrary strong i…
A low-loss ferrite circulator as a tunable chiral quantum system
Ying-Ying Wang, Sean van Geldern, Thomas Connolly +5
Ferrite microwave circulators allow one to control the directional flow of microwave signals and noise, and thus play a crucial role in present-day superconducting quantum technolo…
Intrinsic mechanisms for drive-dependent Purcell decay in superconducting quantum circuits
Ryo Hanai, Alexander McDonald, Aashish Clerk
We develop a new approach to understanding intrinsic mechanisms that cause the -decay rate of a multi-level superconducting qubit to depend on the photonic population of a cou…
Non-equilibrium stationary states of quantum non-Hermitian lattice models
Alexander McDonald, Ryo Hanai, Aashish A. Clerk
We show how generic non-Hermitian tight-binding lattice models can be realized in an unconditional, quantum-mechanically consistent manner by constructing an appropriate open quant…
Exponentially-enhanced quantum sensing with non-Hermitian lattice dynamics
Alexander McDonald, Aashish A. Clerk
We study how unique features of non-Hermitian lattice systems can be harnessed to improve Hamiltonian parameter estimation in a fully quantum setting. While the so-called non-Hermi…
Phase-dependent chiral transport and effective non-Hermitian dynamics in a bosonic Kitaev-Majorana chain
Alexander McDonald, T. Pereg-Barnea, A. A. Clerk
We study a 1D chain of non-interacting bosonic cavities which are subject to nearest-neighbour parametric driving. With a suitable choice of drive phases, this model is strongly an…