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Performance advantage of protective quantum measurements
Maximilian Schlosshauer
We compare the performance of protective quantum measurements to that of standard projective measurements. Performance is quantified in terms of the uncertainty in the measured exp…
Decoherence: From Interpretation to Experiment
Maximilian Schlosshauer
I offer a few selected reflections on the decoherence program, with an emphasis on Zeh's role and views. First, I discuss Zeh's commitment to a realistic interpretation of the quan…
Searching for evidence of algorithmic randomness and incomputability in the output of quantum random number generators
John T. Kavulich, Brennan P. Van Deren, Maximilian Schlosshauer
Ideal quantum random number generators (QRNGs) can produce algorithmically random and thus incomputable sequences, in contrast to pseudo-random number generators. However, the veri…
Parity-based, bias-free optical quantum random number generation with min-entropy estimation
Mathew R. Coleman, Kaylin G. Ingalls, John T. Kavulich +4
We describe the generation of sequences of random bits from the parity of photon counts produced by polarization measurements on a polarization-entangled state. The resulting seque…
Protective measurement of a qubit by a qubit probe
Maximilian Schlosshauer
We study the protective measurement of a qubit by a second qubit acting as a probe. Consideration of this model is motivated by the possibility of its experimental implementation i…
Assessing randomness with the aid of quantum state measurement
Mathew R. Coleman, Kaylin G. Ingalls, John T. Kavulich +4
Randomness is a valuable resource in science, cryptography, engineering, and information technology. Quantum-mechanical sources of randomness are attractive because of the indeterm…
Protective measurement of open quantum systems
Maximilian Schlosshauer
We study protective quantum measurements in the presence of an environment and decoherence. We consider the model of a protectively measured qubit that also interacts with a spin e…
Quantum Decoherence
Maximilian Schlosshauer
Quantum decoherence plays a pivotal role in the dynamical description of the quantum-to-classical transition and is the main impediment to the realization of devices for quantum in…
Scheme for the protective measurement of a single photon using a tunable quantum Zeno effect
Maximilian Schlosshauer
This paper presents a proof-of-principle scheme for the protective measurement of a single photon. In this scheme, the photon is looped arbitrarily many times through an optical st…
Observation of the quantum paradox of separation of a single photon from one of its properties
James M. Ashby, Peter D. Schwarz, Maximilian Schlosshauer
We report an experimental realization of the quantum paradox of the separation of a single photon from one of its properties (the so-called "quantum Cheshire cat"). We use a modifi…
Delayed-choice quantum eraser for the undergraduate laboratory
James M. Ashby, Peter D. Schwarz, Maximilian Schlosshauer
In a delayed-choice quantum eraser, interference fringes are obtained by erasing which-way information after the interfering particle has already been irreversibly detected. Follow…
Measuring the quantum state of a single system with minimum state disturbance
Maximilian Schlosshauer
Conventionally, unknown quantum states are characterized using quantum-state tomography based on strong or weak measurements carried out on an ensemble of identically prepared syst…
Analysis of quantum-state disturbance in a protective measurement of a spin-1/2 particle
Maximilian Schlosshauer
A distinguishing feature of protective measurement is the possibility of obtaining information about expectation values while making the disturbance of the initial state arbitraril…
State disturbance and pointer shift in protective quantum measurements
Maximilian Schlosshauer
We investigate the disturbance of the state of a quantum system in a protective measurement for finite measurement times and different choices of the time-dependent system-apparatu…
My Struggles with the Block Universe
Christopher A. Fuchs, Maximilian Schlosshauer, Blake C. Stacey
This document is the second installment of three in the Cerro Grande Fire Series. Like its predecessor arXiv:quant-ph/0105039, "Notes on a Paulian Idea," it is a collection of lett…
The quantum-to-classical transition and decoherence
Maximilian Schlosshauer
I give a pedagogical overview of decoherence and its role in providing a dynamical account of the quantum-to-classical transition. The formalism and concepts of decoherence theory…
Entanglement, scaling, and the meaning of the wave function in protective measurement
Maximilian Schlosshauer, Tangereen V. B. Claringbold
We examine the entanglement and state disturbance arising in a protective measurement and argue that these inescapable effects doom the claim that protective measurement establishe…
No-go theorem for the composition of quantum systems
Maximilian Schlosshauer, Arthur Fine
Building on the Pusey-Barrett-Rudolph theorem, we derive a no-go theorem for a vast class of deterministic hidden-variables theories, including those consistent on their targeted d…
A Snapshot of Foundational Attitudes Toward Quantum Mechanics
Maximilian Schlosshauer, Johannes Kofler, Anton Zeilinger
Foundational investigations in quantum mechanics, both experimental and theoretical, gave birth to the field of quantum information science. Nevertheless, the foundations of quantu…
Implications of the Pusey-Barrett-Rudolph quantum no-go theorem
Maximilian Schlosshauer, Arthur Fine
Pusey, Barrett, and Rudolph introduce a new no-go theorem for hidden-variables models of quantum theory. We make precise the class of models targeted and construct equivalent model…
What classicality? Decoherence and Bohr's classical concepts
Maximilian Schlosshauer, Kristian Camilleri
Niels Bohr famously insisted on the indispensability of what he termed "classical concepts." In the context of the decoherence program, on the other hand, it has become fashionable…
The quantum-to-classical transition: Bohr's doctrine of classical concepts, emergent classicality, and decoherence
Maximilian Schlosshauer, Kristian Camilleri
It is now widely accepted that environmental entanglement and the resulting decoherence processes play a crucial role in the quantum-to-classical transition and the emergence of "c…
Equivalence between Bell inequalities and quantum Minority game
Adrian P. Flitney, Maximilian Schlosshauer, Christian Schmid +2
We show that, for a continuous set of entangled four-partite states, the task of maximizing the payoff in the symmetric-strategy four-player quantum Minority game is equivalent to…
Decoherence and dissipation of a quantum harmonic oscillator coupled to two-level systems
Maximilian Schlosshauer, Andrew P. Hines, Gerard J. Milburn
We derive and analyze the Born-Markov master equation for a quantum harmonic oscillator interacting with a bath of independent two-level systems. This hitherto virtually unexplored…