research overview
- My main research interests are theoretical quantum physics and quantum computing.
- Contact Info
Combes, Josh
Positions
- Assistant Professor, Electrical, Computer and Energy Engineering (ECEE)
Research Areas
Research
keywords
- quantum sensors, quantum error correction, open quantum systems, quantum measurement, quantum hardware,
Publications
selected publications
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conference proceeding
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Noise in Phase-Preserving Linear Amplifiers.
AIP Conference Proceedings.
53-58.
2012
- Experimental Demonstration of Adaptive Tomography and Self-Calibrating Tomography 2012
-
Rapid state-reduction of quantum systems using feedback control
2006
-
Noise in Phase-Preserving Linear Amplifiers.
AIP Conference Proceedings.
53-58.
2012
-
journal article
-
Nonlinear Sideband Cooling to a Cat State of Motion.
Physical Review Letters.
2023
-
Modeling and Control of Ultracold Atoms Trapped in an Optical Lattice: An Example-driven Tutorial on Quantum Control.
IEEE Control Systems.
28-43.
2023
-
Homodyne measurement with a Schrodinger cat state as a local oscillator.
Physical Review A.
2022
-
Qubit models of weak continuous measurements: Markovian conditional and open-system dynamics (vol 3, 024005, 2018).
Quantum Science and Technology.
2022
-
Projection-operator-based Newton method for the trajectory optimization of closed quantum systems.
Physical Review A.
2022
-
Master equations and quantum trajectories for squeezed wave packets.
Physical Review A.
2022
-
Building a Quantum Engineering Undergraduate Program.
IEEE Transactions on Education.
220-242.
2022
-
Reproducible coherence characterization of superconducting quantum devices.
Applied Physics Letters.
2021
-
Quantum limits on noise for a class of nonlinear amplifiers.
Physical Review A.
2021
-
A self-correcting qubit.
Nature Physics.
437-438.
2021
-
Quantum Computing with Rotation-Symmetric Bosonic Codes.
Physical Review X.
2020
-
ac Flux Sweet Spots in Parametrically Modulated Superconducting Qubits.
Physical Review Applied.
2019
- Quantum Hypercube States. Physical Review Letters. 020402-020402. 2019
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Two-photon self-Kerr nonlinearities for quantum computing and quantum optics.
Physical Review A.
2018
-
Nonreciprocity Realized with Quantum Nonlinearity.
Physical Review Letters.
2018
-
Why protective measurement does not establish the reality of the quantum state.
Quantum Studies: Mathematics and Foundations.
189-211.
2018
-
Qubit models of weak continuous measurements: markovian conditional and open-system dynamics.
Quantum Science and Technology.
2018
-
Nonreciprocal atomic scattering: A saturable, quantum Yagi-Uda antenna.
Physical Review A.
2017
-
Quantum trajectories for propagating Fock states.
Physical Review A.
2017
- Logical randomized benchmarking 2017
-
The SLH framework for modeling quantum input-output networks.
Advances in Physics: X.
784-888.
2017
-
Passive CPHASE Gate via Cross-Kerr Nonlinearities.
Physical Review Letters.
2016
-
Two photons co- and counterpropagating through N cross-Kerr sites.
Physical Review A.
2016
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Quantum and classical control of single photon states via a mechanical resonator.
New Journal of Physics.
2016
-
Models of reduced-noise, probabilistic linear amplifiers.
Physical Review A.
2016
-
Practical Bayesian tomography.
New Journal of Physics.
2016
-
Weak-value amplification: state of play.
Quantum Measurements and Quantum Metrology.
2016
-
Cost of postselection in decision theory.
Physical Review A.
2015
-
Integrated quantum photonic sensor based on Hong-Ou-Mandel interference.
Optics Express.
16008-16023.
2015
-
Comment on "How the Result of a Single Coin Toss Can Turn Out to be 100 Heads" Reply.
Physical Review Letters.
2015
-
Rapid readout of a register of qubits using open-loop quantum control.
Physical Review A: Atomic, Molecular and Optical Physics.
2015
- Ferrie and Combes reply. Physical Review Letters. 118902-118902. 2015
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Global versus local optimality in feedback-controlled qubit purification: new insights from minimizing Renyi entropies.
New Journal of Physics.
2014
-
How the Result of a Single Coin Toss Can Turn Out to be 100 Heads.
Physical Review Letters.
2014
-
Nonabsorbing high-efficiency counter for itinerant microwave photons.
Physical Review B: Condensed Matter and Materials Physics.
2014
-
Quantum limits on postselected, probabilistic quantum metrology.
Physical Review A: Atomic, Molecular and Optical Physics.
2014
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Quantum Nondemolition Detection of a Propagating Microwave Photon.
Physical Review Letters.
2014
-
Weak Value Amplification is Suboptimal for Estimation and Detection.
Physical Review Letters.
2014
- Classical correlation alone supplies the anomaly to weak values 2014
- In-situ characterization of quantum devices with error correction 2014
- Reply to comments on" Weak value amplification is suboptimal for estimation and detection" 2014
-
Quantum limits on probabilistic amplifiers.
Physical Review A: Atomic, Molecular and Optical Physics.
2013
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Breakdown of the Cross-Kerr Scheme for Photon Counting.
Physical Review Letters.
2013
-
Quantum limits on phase-preserving linear amplifiers.
Physical Review A: Atomic, Molecular and Optical Physics.
2012
-
An interleaved sampling scheme for the characterization of single qubit dynamics.
Quantum Information Processing.
1523-1531.
2012
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Qubit purification speed-up for three complementary continuous measurements.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.
5291-5307.
2012
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Quantum filtering for systems driven by fields in single-photon states or superposition of coherent states.
Physical Review A: Atomic, Molecular and Optical Physics.
2012
-
N-photon wave packets interacting with an arbitrary quantum system.
Physical Review A: Atomic, Molecular and Optical Physics.
2012
- Optimal rotation control for a qubit subject to continuous measurement 2012
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Characterization of a qubit Hamiltonian using adaptive measurements in a fixed basis.
Physical Review A: Atomic, Molecular and Optical Physics.
2011
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Maximum Information Gain in Weak or Continuous Measurements of Qudits: Complementarity Is Not Enough.
Physical Review X.
2011
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Quantum feedback for rapid state preparation in the presence of control imperfections.
Journal of Physics B: Atomic, Molecular and Optical Physics.
2011
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Rapid purification of quantum systems by measuring in a feedback-controlled unbiased basis.
Physical Review A: Atomic, Molecular and Optical Physics.
2010
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Replacing quantum feedback with open-loop control and quantum filtering.
Physical Review A: Atomic, Molecular and Optical Physics.
2010
-
Rapid measurement of quantum systems using feedback control.
Physical Review Letters.
2008
-
Rapid state reduction of quantum systems using feedback control.
Physical Review Letters.
2006
-
States for phase estimation in quantum interferometry.
Journal of optics. B, Quantum and semiclassical optics : journal of the European Optical Society.
14-21.
2005
-
Nonlinear Sideband Cooling to a Cat State of Motion.
Physical Review Letters.
2023
Teaching
courses taught
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ECEN 3250 - Microelectronics
Primary Instructor - Fall 2021 / Fall 2022
Develops a basic understanding of active semiconductor devices. Focuses on building an understanding of BJT and CMOS devices in both digital and analog applications. -
ECEN 4033 - Special Topics
Primary Instructor - Fall 2020
Examines a special topic in Electrical, Computer and Energy Engineering. May be repeated up to 9 total credit hours. -
ECEN 4925 - Foundations of Quantum Hardware
Primary Instructor - Spring 2023
Introduces students to the principles and operation of quantum hardware. In this course you will learn how to describe many different physical systems (trapped Ions, superconducting circuits, and optical systems) mathematically. This will allow you to model quantum sensors, communication systems and computing hardware. Same as ECEN 5295. -
ECEN 5005 - Special Topics
Primary Instructor - Spring 2022
Examines a special topic in Electrical, Computer and Energy Engineering. May be repeated up to 9 total credit hours. -
ECEN 5016 - Special Topics
Primary Instructor - Spring 2021
- -
ECEN 5033 - Special Topics
Primary Instructor - Fall 2020
Examines a special topic in Electrical, Computer and Energy Engineering. May be repeated up to 9 total credit hours. -
ECEN 5925 - Foundations of Quantum Hardware
Primary Instructor - Spring 2023
Introduces students to the principles and operation of quantum hardware. In this course you will learn how to describe many different physical systems (trapped Ions, superconducting circuits, and optical systems) mathematically. This will allow you to model quantum sensors, communication systems and computing hardware. Same as ECEN 4295.
Background
education and training
- Ph.D., Griffith University (Australia) 2010
- B.E.E., Griffith University (Australia) 2003
- B.S., Griffith University (Australia) 2001