Showing 2014 · quant-phShow all

20 papers · 2 filters

quant-ph2014★ 13 cited

A tunable, nonlinear Hong-Ou-Mandel interferometer

David Oehri, Mikhail Pletyukhov, Vladimir Gritsev +2

We investigate the two-photon scattering properties of a Jaynes-Cummings (JC) nonlinearity consisting of a two-level system (qubit) interacting with a single mode cavity, which is…

quant-ph2014★ 21 cited

Fault-Tolerant Quantum Computation for Singlet-Triplet Qubits with Leakage Errors

Sebastian Mehl, Hendrik Bluhm, David P. DiVincenzo

We describe and analyze leakage errors of singlet-triplet qubits. Even though leakage errors are a natural problem for spin qubits encoded using quantum dot arrays, they have obtai…

quant-ph2014★ 495 cited

Quantum Illumination at the Microwave Wavelengths

Shabir Barzanjeh, Saikat Guha, Christian Weedbrook +3

Quantum illumination is a quantum-optical sensing technique in which an entangled source is exploited to improve the detection of a low-reflectivity object that is immersed in a br…

quant-ph2014★ 47 cited

Universal adiabatic quantum computation via the space-time circuit-to-Hamiltonian construction

David Gosset, Barbara M. Terhal, Anna Vershynina

We show how to perform universal adiabatic quantum computation using a Hamiltonian which describes a set of particles with local interactions on a two-dimensional grid. A single pa…

quant-ph2014★ 53 cited

Characterizing Topological Order with Matrix Product Operators

Mehmet Burak Şahinoğlu, Dominic Williamson, Nick Bultinck +4

One of the most striking features of quantum phases that exhibit topological order is the presence of long range entanglement that cannot be detected by any local order parameter.…

quant-ph2014★ 7 cited

Complete criterion for convex-Gaussian state detection

Anna Vershynina

We present a new criterion that determines whether a fermionic state is a convex combination of pure Gaussian states. This criterion is complete and characterizes the set of convex…

quant-ph2014★ 78 cited

Transfer Matrices and Excitations with Matrix Product States

V. Zauner, D. Draxler, L. Vanderstraeten +6

We investigate the relation between static correlation functions in the ground state of local quantum many-body Hamiltonians and the dispersion relations of the corresponding low e…

quant-ph2014★ 43 cited

Supersymmetry in quantum optics and in spin-orbit coupled systems

Michael Tomka, Mikhail Pletyukhov, Vladimir Gritsev

Light-matter interaction is naturally described by coupled bosonic and fermionic subsystems. This suggests that a certain Bose-Fermi duality is naturally present in the fundamental…

quant-ph2014★ 3 cited

Environment-induced mixing processes in quantum walks

Lauri Lehman

The mixing process of discrete-time quantum walks on one-dimensional lattices is revisited in a setting where the walker is coupled to an environment, and the time evolution of the…

quant-ph2014★ 21 cited

Reflection Positivity for Parafermions

Arthur Jaffe, Fabio L. Pedrocchi

We establish reflection positivity for Gibbs trace states for a class of gauge-invariant, reflection-invariant Hamiltonians describing parafermion interactions on a lattice. We rel…

quant-ph2014★ 56 cited

Dispersive Qubit Measurement by Interferometry with Parametric Amplifiers

Sh. Barzanjeh, D. P. DiVincenzo, B. M. Terhal

We perform a detailed analysis of how an amplified interferometer can be used to enhance the quality of a dispersive qubit measurement, such as one performed on a superconducting t…

quant-ph2014★ 142 cited

Gauging quantum states: from global to local symmetries in many-body systems

Jutho Haegeman, Karel Van Acoleyen, Norbert Schuch +2

We present an operational procedure to transform global symmetries into local symmetries at the level of individual quantum states, as opposed to typical gauging prescriptions for…

quant-ph2014★ 146 cited

Approximating Gibbs states of local Hamiltonians efficiently with PEPS

András Molnár, Norbert Schuch, Frank Verstraete +1

We analyze the error of approximating Gibbs states of local quantum spin Hamiltonians on lattices with Projected Entangled Pair States (PEPS) as a function of the bond dimension ($…

quant-ph2014★ 102 cited

Scattering of two photons from two distant qubits: Exact solution

Matti Laakso, Mikhail Pletyukhov

We consider the inelastic scattering of two photons from two qubits separated by an arbitrary distance and coupled to a one-dimensional transmission line. We present an exact,…

quant-ph2014★ 15 cited

Macroscopically deterministic, Markovian thermalization in finite quantum spin systems

Hendrik Niemeyer, Kristel Michielsen, Hans de Raedt +1

A key feature of non-equilibrium thermodynamics is the Markovian, deterministic relaxation of coarse observables such as, for example, the temperature difference between two macros…

quant-ph2014★ 57 cited

High-Fidelity Single-Qubit Gates for Two-Electron Spin Qubits in GaAs

Pascal Cerfontaine, Tim Botzem, David P. DiVincenzo +1

Single-qubit operations on singlet-triplet qubits in GaAs double quantum dots have not yet reached the fidelities required for fault-tolerant quantum information processing. Consid…

quant-ph2014★ 72 cited

Blackbox Quantization of Superconducting Circuits using exact Impedance Synthesis

Firat Solgun, David W. Abraham, David P. DiVincenzo

We propose a new quantization method for superconducting electronic circuits involving a Josephson junction device coupled to a linear microwave environment. The method is based on…

quant-ph2014★ 6 cited

Discrete-event simulation of uncertainty in single-neutron experiments

Hans De Raedt, Kristel Michielsen

A discrete-event simulation approach which provides a cause-and-effect description of many experiments with photons and neutrons exhibiting interference and entanglement is applied…

quant-ph2014★ 1 cited

Event-based simulation of neutron experiments: interference, entanglement and uncertainty relations

Kristel Michielsen, Hans De Raedt

We discuss a discrete-event simulation approach, which has been shown to give a unified cause-and-effect description of many quantum optics and single-neutron interferometry experi…

quant-ph2014★ 2 cited

Event-by-event simulation of experiments to create entanglement and violate Bell inequalities

K. Michielsen, H. De Raedt

We discuss a discrete-event, particle-based simulation approach which reproduces the statistical distributions of Maxwell's theory and quantum theory by generating detection events…