# Parity detection and entanglement with a Mach-Zehnder interferometer

@article{Haack2010ParityDA, title={Parity detection and entanglement with a Mach-Zehnder interferometer}, author={G{\'e}raldine Haack and Heidi Forster and Markus Buttiker}, journal={Physical Review B}, year={2010}, volume={82}, pages={155303} }

United Nations University, Hermann-Ehlers-Str. 10, 53113 Bonn, Germany(Dated: November 12, 2010)A parity meter projects the state of two qubits onto two subspaces with diﬀerent parities, thestates in each parity class being indistinguishable. It has application in quantum information forits entanglement properties. In our work we consider the electronic Mach-Zehnder interferometer(MZI) coupled capacitively to two double quantum dots (DQDs), one on each arm of the MZI.These charge qubits couple…

## 24 Citations

Deterministic entanglement of superconducting qubits by parity measurement and feedback

- Physics, MedicineNature
- 2013

Here, a time-resolved, continuous parity measurement of two superconducting qubits is performed using the cavity in a three-dimensional circuit quantum electrodynamics architecture and phase-sensitive parametric amplification to produce entanglement by parity measurement reaching 88 per cent fidelity to the closest Bell state.

Measurement-induced entanglement of two transmon qubits by a single photon

- Physics
- 2017

On-demand creation of entanglement between distant qubits is a necessary ingredient for distributed quantum computation. We propose an entanglement scheme that allows for single-shot deterministic…

Feedback control of superconducting quantum circuits

- Physics
- 2014

Superconducting circuits have recently risen to the forefront of the solid-state prototypes for quantum computing. Reaching the stage of robust quantum computing requires closing the loop between…

Single-shot energetic-based estimator for entanglement in a half-parity measurement setup

- Physics, MathematicsQuantum
- 2019

Producing and certifying entanglement between distant qubits is a highly desirable skill for quantum information technologies. Here we propose a new strategy to monitor and characterize entanglement…

Resources Needed for Entangling Two Qubits through an Intermediate Mesoscopic System

- Physics
- 2019

One of the main challenges in designing large scale quantum processors is connecting separated qubits. In this thesis, we explore new opportunities that mesoscopic manybody systems provide for…

Phase estimation by photon counting measurements in the output of a linear Mach–Zehnder interferometer

- Physics
- 2012

Photon counting measurements are analyzed for obtaining a classical phase parameter in a linear Mach–Zehnder interferometer (MZI) by the use of phase estimation theories. The detailed analysis is…

Measurement-induced deterministic and probabilistic entanglement with strong and weak interactions

- Physics
- 2017

Abstract A scheme is proposed to transform spatial coherence of a single particle into entanglement. Two quantum systems can be entangled by having them interact in parallel with an ancillary…

Single-shot energetic-based estimator for entanglement genesis

- Physics
- 2018

Producing and certifying entanglement between distant qubits is a highly desirable skill for quantum information technologies. Here we propose a new strategy to monitor and characterize entanglement…

Entanglement of two noninteracting qubits via a mesoscopic system

- Physics, MathematicsPhysical Review A
- 2018

We propose a method for entangling two non-interacting qubits by measuring their parity indirectly through an intermediate mesoscopic system. The protocol is designed to require only global control…

Digital feedback in superconducting quantum circuits

- Mathematics, Physics
- 2015

This chapter covers the development of feedback control of superconducting qubits using projective measurement and a discrete set of conditional actions, here referred to as digital feedback. We…

## References

SHOWING 1-3 OF 3 REFERENCES

Quantum Computation and Quantum Information

- Physics
- 2000

Preface Acknowledgement Nomenclature and notation Part I. Fundamental Concepts: 1. Introduction and overview 2. Introduction to quantum mechanics 3. Introduction to computer science Part II. Quantum…