305 citations · 1.9k across the 39 of their papers we have counts for
23 papers · 1 filter
Classically computing performance bounds on depolarized quantum circuits
Sattwik Deb Mishra, Miguel Frías-Pérez, Rahul Trivedi
Quantum computers and simulators can potentially outperform classical computers in finding ground states of classical and quantum Hamiltonians. However, if this advantage can persi…
Quantum advantage and stability to errors in analogue quantum simulators
Rahul Trivedi, Adrian Franco Rubio, J. Ignacio Cirac
Several quantum hardware platforms, while being unable to perform fully fault-tolerant quantum computation, can still be operated as analogue quantum simulators for addressing many…
Realizing tight-binding Hamiltonians using site-controlled coupled cavity arrays
Abhi Saxena, Arnab Manna, Rahul Trivedi +1
Analog quantum simulators rely on programmable quantum devices to emulate Hamiltonians describing various physical phenomenon. Photonic coupled cavity arrays are a promising platfo…
Description and complexity of Non-markovian open quantum dynamics
Rahul Trivedi
Understanding and simulating non-Markovian quantum dynamics remains an important challenge in open quantum system theory. A key advance in this endeavour would be to develop a unif…
Error propagation in NISQ devices for solving classical optimization problems
Guillermo González-García, Rahul Trivedi, J. Ignacio Cirac
We propose a random circuit model to analyze the impact of noise on the performance of variational quantum circuits for classical optimization problems. Our model accounts for the…
Three-photon excitation of quantum two-level systems
Viviana Villafañe, Bianca Scaparra, Manuel Rieger +8
We demonstrate that semiconductor quantum dots can be excited efficiently in a resonant three-photon process, whilst resonant two-photon excitation is highly suppressed. Time-depen…
Simulability transitions in continuous-time dynamics of local open quantum systems
Rahul Trivedi, J. Ignacio Cirac
We analyze the complexity of classically simulating continuous-time dynamics of locally interacting quantum spin systems with a constant rate of entanglement breaking noise. We pro…
Superradiance in dynamically modulated Tavis-Cumming model with spectral disorder
Alexander D. White, Rahul Trivedi, Kalyan Narayanan +1
Superradiance is the enhanced emission of photons from quantum emitters collectively coupling to the same optical mode. However, disorder in the resonant frequencies of the quantum…
Convergence guarantees for discrete mode approximations to non-Markovian quantum baths
Rahul Trivedi, Daniel Malz, J. Ignacio Cirac
Non-Markovian effects are important in modeling the behavior of open quantum systems arising in solid-state physics, quantum optics as well as in study of biological and chemical s…
Quantum algorithms for powering stable Hermitian matrices
Guillermo González, Rahul Trivedi, J. Ignacio Cirac
Matrix powering is a fundamental computational primitive in linear algebra. It has widespread applications in scientific computing and engineering, and underlies the solution of ti…
Control design for inhomogeneous broadening compensation in single-photon transducers
Sattwik Deb Mishra, Rahul Trivedi, Amir H. Safavi-Naeini +1
A transducer of single photons between microwave and optical frequencies can be used to realize quantum communication over optical fiber links between distant superconducting quant…
Optimal two-photon excitation of bound states in non-Markovian waveguide QED
Rahul Trivedi, Daniel Malz, Shanhui Fan +1
Bound states arise in waveguide QED systems with a strong frequency-dependence of the coupling between emitters and photonic modes. While exciting such bound-states with single pho…
Few-particle scattering from localized quantum systems in spatially structured bosonic baths
Rahul Trivedi, Kevin Fischer, Shanhui Fan +1
Understanding dynamics of localized quantum systems embedded in engineered bosonic environments is a central problem in quantum optics and open quantum system theory. We present a…
Analytic and geometric properties of scattering from periodically modulated quantum-optical systems
Rahul Trivedi, Alex White, Shanhui Fan +1
We study the scattering of photons from periodically modulated quantum-optical systems. For excitation-number conserving quantum optical systems, we connect the analytic structure…
Spectrally reconfigurable quantum emitters enabled by optimized fast modulation
Daniil M. Lukin, Alexander D. White, Rahul Trivedi +16
The ability to shape photon emission facilitates strong photon-mediated interactions between disparate physical systems, thereby enabling applications in quantum information proces…
Point-coupling Hamiltonian for frequency-independent linear optical devices
Rahul Trivedi, Kevin Fischer, Sattwik Deb Mishra +1
We present the point-coupling Hamiltonian as a model for frequency-independent linear optical devices acting on propagating optical modes described as a continua of harmonic oscill…
Generation of non-classical light using semiconductor quantum dots
Rahul Trivedi, Kevin Fischer, Jelena Vuckovic +1
Sources of non-classical light are of paramount importance for future applications in quantum science and technology such as quantum communication, quantum computation and simulati…
Photon blockade in weakly-driven cavity QED systems with many emitters
Rahul Trivedi, Marina Radulaski, Kevin A. Fischer +2
We use the scattering matrix formalism to analyze photon blockade in coherently-driven CQED systems with a weak drive. By approximating the weak coherent drive by an input single-…
Few-photon scattering and emission from open quantum systems
Rahul Trivedi, Kevin Fischer, Shanshan Xu +2
We show how to use the input-output formalism compute the propagator for an open quantum system, i.e. quantum networks with a low dimensional quantum system coupled to one or more…
Pulsed coherent drive in the Jaynes--Cummings model
Kevin Fischer, Shuo Sun, Daniil Lukin +3
The Jaynes--Cummings system is one of the most fundamental models of how light and matter interact. When driving the system with a coherent state (e.g. laser light), it is often as…
Particle emission from open-quantum systems
Kevin A. Fischer, Rahul Trivedi, Daniil Lukin
In this work, we discuss connections between different theoretical physics communities and their works, all related to systems that act as sources of particles such as photons, pho…
Quantum dot single photon sources with ultra-low multi-photon probability
Lukas Hanschke, Kevin A. Fischer, Stefan Appel +7
High-quality sources of single photons are of paramount importance for quantum communication, sensing and metrology. To these ends, resonantly excited two-level systems based on se…
Scattering into one-dimensional waveguides from a coherently-driven quantum-optical system
Kevin A. Fischer, Rahul Trivedi, Vinay Ramasesh +2
We develop a new computational tool and framework for characterizing the scattering of photons by energy-nonconserving Hamiltonians into unidirectional (chiral) waveguides, for exa…