10.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of TsukubaJP1.6k papers
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- Waseda UniversityJP1.6k papers
- University of ChicagoUS1.6k papers
- Centre National de la Recherche ScientifiqueFR1.5k papers
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20 papers · 2 filters
Sufficient Conditions for Efficient Classical Simulation of Quantum Optics
Saleh Rahimi-Keshari, Timothy C. Ralph, Carlton M. Caves
We provide general sufficient conditions for the efficient classical simulation of quantum-optics experiments that involve inputting states to a quantum process and making measurem…
Quantum memories: emerging applications and recent advances
Khabat Heshami, Duncan G. England, Peter C. Humphreys +4
Quantum light-matter interfaces are at the heart of photonic quantum technologies. Quantum memories for photons, where non-classical states of photons are mapped onto stationary ma…
The power of being positive: Robust state estimation made possible by quantum mechanics
Amir Kalev, Charles H. Baldwin, Ivan H. Deutsch
We study the problem of quantum-state tomography under the assumption that the state of the system is close to pure. In this context, an efficient measurements that one typically f…
Informational completeness in bounded-rank quantum-state tomography
Charles H. Baldwin, Ivan H. Deutsch, Amir Kalev
We consider the problem of quantum-state tomography under the assumption that the state is pure, and more generally that its rank is bounded by a given value. In this scenario, new…
Why protective measurement does not establish the reality of the quantum state
Joshua Combes, Christopher Ferrie, Matthew S. Leifer +1
"Protective measurement" refers to two related schemes for finding the expectation value of an observable without disturbing the state of a quantum system, given a single copy of t…
Dispersive response of atoms trapped near the surface of an optical nanofiber with applications to quantum nondemolition measurement and spin squeezing
Xiaodong Qi, Ben Q. Baragiola, Poul S. Jessen +1
We study the strong coupling between photons and atoms that can be achieved in an optical nanofiber geometry when the interaction is dispersive. While the Purcell enhancement facto…
Entropy, majorization and thermodynamics in general probabilistic theories
Howard Barnum, Jonathan Barrett, Marius Krumm +1
In this note we lay some groundwork for the resource theory of thermodynamics in general probabilistic theories (GPTs). We consider theories satisfying a purely convex abstraction…
Hierarchy of universal entanglement in 2D measurement-based quantum computation
Jacob Miller, Akimasa Miyake
Measurement-based quantum computation (MQC) is a paradigm for studying quantum computation using many-body entanglement and single-qubit measurements. While MQC has inspired wide-r…
Fisher-symmetric informationally complete measurements for pure states
Nan Li, Christopher Ferrie, Jonathan A. Gross +2
We introduce a new kind of quantum measurement that is defined to be symmetric in the sense of uniform Fisher information across a set of parameters that injectively represent pure…
Some Nearly Quantum Theories
Howard Barnum, Matthew A. Graydon, Alexander Wilce
We consider possible non-signaling composites of probabilistic models based on euclidean Jordan algebras. Subject to some reasonable constraints, we show that no such composite exi…
On the novelty, efficacy, and significance of weak measurements for quantum tomography
Jonathan A. Gross, Ninnat Dangniam, Christopher Ferrie +1
The use of weak measurements for performing quantum tomography is enjoying increased attention due to several recent proposals. The advertised merits of using weak measurements in…
Characterizing and Quantifying Quantum Chaos with Quantum Tomography
Vaibhav Madhok, Carlos A. Riofrío, Ivan H. Deutsch
We explore quantum signatures of classical chaos by studying the rate of information gain in quantum tomography. The tomographic record consists of a time series of expectation val…
How an autonomous quantum Maxwell demon can harness correlated information
Adrian Chapman, Akimasa Miyake
We study an autonomous quantum system which exhibits refrigeration under an information-work trade-off like a Maxwell demon. The system becomes correlated as a single "demon" qubit…
Cost of postselection in decision theory
Joshua Combes, Christopher Ferrie
Postselection is the process of discarding outcomes from statistical trials that are not the event one desires. Postselection can be useful in many applications where the cost of g…
Minimax quantum tomography: the ultimate bounds on accuracy
Christopher Ferrie, Robin Blume-Kohout
A minimax estimator has the minimum possible error ("risk") in the worst case. We construct the first minimax estimators for quantum state tomography with relative entropy risk. Th…
Near-optimal quantum tomography: estimators and bounds
Richard Kueng, Christopher Ferrie
We give bounds on the average fidelity achievable by any quantum state estimator, which is arguably the most prominently used figure of merit in quantum state tomography. Moreover,…
Operational Discord Measure for Gaussian States with Gaussian Measurements
Saleh Rahimi-Keshari, Timothy C. Ralph, Carlton M. Caves
We introduce an operational discord-type measure for quantifying nonclassical correlations in bipartite Gaussian states based on using Gaussian measurements. We refer to this measu…
Quantum Tomography Protocols with Positivity are Compressed Sensing Protocols
Amir Kalev, Robert L. Kosut, Ivan H. Deutsch
Characterizing complex quantum systems is a vital task in quantum information science. Quantum tomography, the standard tool used for this purpose, uses a well-designed measurement…
Assembling a ring-shaped crystal in a microfabricated surface ion trap
Boyan Tabakov, Francisco Benito, Matthew Blain +7
We report on experiments with a microfabricated surface trap designed for trapping a chain of ions in a ring. Uniform ion separation over most of the ring is achieved with a rotati…
Entangling Atomic Spins with a Strong Rydberg-Dressed Interaction
Y. -Y. Jau, A. M. Hankin, Tyler Keating +2
Controlling quantum entanglement between parts of a many-body system is the key to unlocking the power of quantum information processing for applications such as quantum computatio…