148 citations · 635 across the 25 of their papers we have counts for
26 papers
Improving precision scaling via backaction-evading continuous measurement in a driven-dissipative Kerr parametric oscillator
Cheng Zhang, Xinhui Cui, Jiaying Pan +3
Dissipative phase transitions in the driven-dissipative Kerr parametric oscillator offer a promising route for realizing criticality-enhanced quantum sensing based on continuous me…
Criticality-enhanced global frequency sensing with a monitored Kerr parametric oscillator via extended Kalman filter
Cheng Zhang, Mauro Cirio, Xin-Qi Li +1
We analyze a global sensing scenario in which the frequency of a monitored Kerr parametric oscillator is estimated assuming limited prior information. The frequency is estimated in…
Critical quantum sensing via backaction-evading continuous measurement
Cheng Zhang, Mauro Cirio, Xin-Qi Li +1
Continuous monitoring of open quantum-optical systems offers a promising route towards quantum-enhanced sensing. In such sensing schemes, the ultimate precision limit is dictated b…
Exact description of fermionic reservoirs via purified damped ancillary fermions
Pengfei Liang, Neill Lambert, Mauro Cirio
We present a method for the modeling of fermionic reservoirs using a new class of ancillary damped fermions, dubbed purified pseudofermions, which exhibit unusual free correlations…
Purified pseudomode model for nonlinear system-bath interactions
Cheng Zhang, Neill Lambert, Xin-Qi Li +2
The theory of purified pseudomodes [arXiv:2412.04264 (2024)] was recently developed to provide a numerical tool for the analysis of the properties of a quantum system and the envir…
A purified input-output pseudomode model for structured open quantum systems
Pengfei Liang, Neill Lambert, Si Luo +2
A full understanding of open quantum systems requires the characterization of both system and environmental properties. However, the complexity of the environmental statistics in t…
Super-bath Quantum Eigensolver
Tianren Wang, Zongkang Zhang, Bing-Nan Lu +2
The simulation of the dynamics of a system coupled to a low-temperature environment is a promising application of quantum computers to determine ground-state properties of physical…
Revealing non-Markovian Kondo transport with waiting time distributions
Feng-Jui Chan, Po-Chen Kuo, Neill Lambert +2
We investigate non-Markovian transport dynamics and signatures of the Kondo effect in a single impurity Anderson model. The model consists of a quantum dot (QD) with ultra-strong c…
Input-Output Hierarchical Equations Of Motion
Mauro Cirio, Pengfei Liang, Neill Lambert
We derive an extended version of the hierarchical equations of motion (HEOM) to compute output physical properties of a bosonic environment, which is allowed to be initially prepar…
Non-Hermitian Pseudomodes for Strongly Coupled Open Quantum Systems: Unravelings, Correlations and Thermodynamics
Paul Menczel, Ken Funo, Mauro Cirio +2
The pseudomode framework provides an exact description of the dynamics of an open quantum system coupled to a non-Markovian environment. Using this framework, the influence of the…
Modeling the unphysical pseudomode model with physical ensembles: simulation, mitigation, and restructuring of non-Markovian quantum noise
Mauro Cirio, Si Luo, Pengfei Liang +2
The influence of a Gaussian environment on a quantum system can be described by effectively replacing the continuum with a discrete set of ancillary quantum and classical degrees o…
Fixing detailed balance in ancilla-based dissipative state engineering
Neill Lambert, Mauro Cirio, Jhen-dong Lin +3
Dissipative state engineering is a general term for a protocol which prepares the ground state of a complex many-body Hamiltonian using engineered dissipation or engineered environ…
HierarchicalEOM.jl: An efficient Julia framework for hierarchical equations of motion in open quantum systems
Yi-Te Huang, Po-Chen Kuo, Neill Lambert +5
The hierarchical equations of motion (HEOM) approach can describe the reduced dynamics of a system simultaneously coupled to multiple bosonic and fermionic environments. The comple…
The Closed and Open Unbalanced Dicke Trimer Model: Critical Properties and Nonlinear Semiclassical Dynamics
Cheng Zhang, Pengfei Liang, Neill Lambert +1
We study a generalization of a recently introduced Dicke trimer model [Phys. Rev. Lett. 128, 163601, Phys. Rev. Research 5, L042016], which allows for cavity losses and unbalanced…
Kondo QED: The Kondo effect and photon trapping in a two-impurity Anderson model ultra-strongly coupled to light
Po-Chen Kuo, Neill Lambert, Mauro Cirio +3
The Kondo effect is one of the most studied examples of strongly correlated quantum many-body physics. Another type of strongly correlated physics that has only recently been explo…
A quantum-classical decomposition of Gaussian quantum environments: a stochastic pseudomode model
Si Luo, Neill Lambert, Pengfei Liang +1
We show that the effect of a Gaussian Bosonic environment linearly coupled to a quantum system can be simulated by a stochastic Lindblad master equation characterized by a set of a…
A pseudo-fermion method for the exact description of fermionic environments: from single-molecule electronics to Kondo resonance
Mauro Cirio, Neill Lambert, Pengfei Liang +5
We develop a discrete fermion approach for modelling the strong interaction of an arbitrary system interacting with continuum electronic reservoirs. The approach is based on a pseu…
Unveiling and veiling a Schrödinger cat state from the vacuum
Roberto Stassi, Mauro Cirio, Ken Funo +3
Deep in the ultrastrong light-matter coupling regime, it has been predicted that the ground state of a two-level atom interacting with a cavity mode takes the form of a "virtual" S…
The Fermionic influence superoperator: a canonical derivation for the development of methods to simulate the influence of a Fermionic environment on a quantum system with arbitrary parity symmetry
Mauro Cirio, Po-Chen Kuo, Yueh-Nan Chen +2
We present a canonical derivation of an influence superoperator which generates the reduced dynamics of a Fermionic quantum system linearly coupled to a Fermionic environment initi…
Virtual excitations in the ultra-strongly-coupled spin-boson model: physical results from unphysical modes
Neill Lambert, Shahnawaz Ahmed, Mauro Cirio +1
Here we show how, in the ultra-strongly-coupled spin-boson model, apparently unphysical "Matsubara modes" are required not only to regulate detailed balance, but also to arrive at…
Scalable quantum computer with superconducting circuits in the ultrastrong coupling regime
Roberto Stassi, Mauro Cirio, Franco Nori
So far, superconducting quantum computers have certain constraints on qubit connectivity, such as nearest-neighbor couplings. To overcome this limitation, we propose a scalable arc…
Multielectron Ground State Electroluminescence
Mauro Cirio, Nathan Shammah, Neill Lambert +2
The ground state of a cavity-electron system in the ultrastrong coupling regime is characterized by the presence of virtual photons. If an electric current flows through this syste…
Amplified and tunable transverse and longitudinal spin-photon coupling in hybrid circuit-QED
Neill Lambert, Mauro Cirio, Matthieu Delbecq +4
We describe a method to tune, in-situ, between transverse and longitudinal light-matter coupling in a hybrid circuit-QED device composed of an electron spin degree of freedom coupl…
Amplified opto-mechanical transduction of virtual radiation pressure
Mauro Cirio, Kamanasish Debnath, Neill Lambert +1
Here we describe how, utilizing a time-dependent opto-mechanical interaction, a mechanical probe can provide an amplified measurement of the virtual photons dressing the quantum gr…