Quantum-classical hypothesis tests in macroscopic matter-wave interferometry

Schrinski, Björn; Nimmrichter, Stefan; Hornberger, Klaus

doi:10.1103/physrevresearch.2.033034

Cited by 30 publications

(21 citation statements)

References 46 publications

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“…as we would expect from (30). The decay widths appear to depend on the absolute values m H/L of masses of neutral mesons, which play no role in standard quantum mechanics.…”

Section: Qmupl and Csl Modelsmentioning

confidence: 75%

“…In particular, collapse models were analyzed with respect to the spontaneous radiation emission from charged particles [16][17][18] and put to experimental tests by X-rays [19][20][21][22][23]. Furthermore, spontaneous collapse models were recently studied in the context of coldatom experiments [24], gravitational waves [25], levitated nanoparticles [26], matter-wave interferometry [27][28][29][30], and optomechanical setups [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

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Particle mixing and the emergence of classicality: A spontaneous-collapse-model view

Simonov

2020

Phys. Rev. A

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Spontaneous collapse models aim to resolve the measurement problem in quantum mechanics by considering wave-function collapse as a physical process. We analyze how these models affect a decaying flavor oscillating system whose evolution is governed by a phenomenological non-Hermitian Hamiltonian. In turn, we apply two popular collapse models, the QMUPL and the CSL models, to a neutral meson system. By using the equivalence between the approaches to the time evolution of decaying systems with a non-Hermitian Hamiltonian and a dissipator of the Lindblad form in an enlarged Hilbert space, we show that spontaneous collapse can induce the decay dynamics in both quantum state and master equations. Moreover, we show that the decay property of a flavor oscillating system is intimately connected to the time (a)symmetry of the noise field underlying the collapse mechanism. This (a)symmetry, in turn, is related to the definition of the stochastic integral and can provide a physical intuition behind the Itō/Stratonovich dilemma in stochastic calculus.

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“…as we would expect from (30). The decay widths appear to depend on the absolute values m H/L of masses of neutral mesons, which play no role in standard quantum mechanics.…”

Section: Qmupl and Csl Modelsmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Particle mixing and the emergence of classicality: A spontaneous-collapse-model view

Simonov

2020

Phys. Rev. A

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“…The very fundamentals of quantum mechanics, i.e., the superposition principle and wavefunction collapse models (see for instance, Chap. 15 in [25]; also see [26,27]; for more recent experimental proposals and/or results that employ both interferometric and noninterferometric-based approaches, see [28][29][30][31] and the references listed therein) can be potentially tested and/or investigated using atom interferometry experiments in space environments. On this front [32], serves as an excellent current Perspective on the status of space-based approaches for quantum gravity measurements.…”

Section: Alternative Proposalsmentioning

confidence: 99%

Stern-Gerlach Interferometry for Tests of Quantum Gravity and General Applications

Lokare

2022

Front. Phys.

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Stern-Gerlach and/or matter-wave interferometry has garnered significant interest amongst members of the scientific community over the past few decades. Early theoretical results by Schwinger et al. demonstrate the fantastic precision capabilities required to realize a full-loop Stern-Gerlach interferometer, i.e., a Stern-Gerlach setup that houses the capability of recombining the split wave-packets in both, position and momentum space over a certain characteristic interferometric time. Over the years, several proposals have been put forward that seek to use Stern-Gerlach and/or matter-wave interferometry as a tool for a myriad of applications of general interest, some of which include tests for fundamental physics (viz., quantum wave-function collapse, stringent tests for the Einstein equivalence principle at the quantum scale, breaking the Standard Quantum Limit (SQL) barrier, and so forth), precision sensing, quantum metrology, gravitational wave detection and inertial navigation. In addition, a large volume of work in the existing literature has been dedicated to the possibility of using matter-wave interferometry for tests of quantum gravity. Inspired by the developments in this timely research field, this Perspective attempts to provide a general overview of the theory involved, the challenges that are yet to be addressed and a brief outlook on what lays ahead.

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“…This represents, to our knowledge, the longest coherence time to-date for a massive object in a spatially separated quantum superposition state. As we aim to realize even longer coherence times, and for larger wavepacket separations, our demonstrations can continue to inform theories regarding the macroscopic limits of quantum mechanics [105].…”

Section: Discussionmentioning

confidence: 85%

Lattice Atom Interferometry in an Optical Cavity

2021

Frontiers in Optics + Laser Science 2021

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Atom interferometers are powerful tools for both measurements in fundamental physics and inertial sensing applications. Their performance, however, has been limited by the available interrogation time of freely falling atoms in a gravitational field. In this thesis, we realize an unprecedented interrogation time of 20 seconds by suspending the spatially separated atomic wavepackets in the resonant lattice of an optical cavity. Unlike traditional atom interferometers, our approach allows gravitational potentials to be measured by holding, rather than dropping, atoms. After seconds of hold time, gravitational potential energy differences from as little as microns of vertical separation generate megaradians of interferometer phase. This trapped geometry suppresses the phase variance due to vibrations by three to four orders of magnitude, overcoming the dominant noise source in atom-interferometric gravimeters. i To Mommy, Daddy, Xiaodude, and Andrew For the life you have built for me, for your light that shines warmly on me, and for your love that knows me.ii ContentsContents ii List of Figures v List of Tables viiWhen I joined the experiment in Spring 2016, I joined an amazing team consisting of a senior graduate student Matt Jaffe, and a postdoc Philipp Haslinger. My first day, Holger, Matt, Philipp and I went to Coffee Lab to grab coffee and talk, and I was immediately hooked on the experiment. We went to lab, and Matt walked me through turning on the experiment -a thing I've done maybe a couple hundred times in the 4 years since. In this time, I have been lucky to gain new teammates on the cavity, including a visiting master's student, Sofus Kristensen, and a visiting postdoc, Logan Clark. Going forwards, I have watched an incredible team in our postdoc Cristian Panda, and graduate student James Egelhoff, steadily do the "essential work" of transforming our experiment into a better version of itself while the world was in quarantine.With the cavity experiment, I have been lucky to experience how exciting science can be in the best of times. I remember the first signs that the blackbody force was attractive. I remember taking data for the juggling interferometer, and turning up the loop number to 50 and incredulously seeing interference still. With the lattice interferometer, I had a lot of these moments. I remember the first time we saw a 10 second lattice interferometer. It was night. I was in lab having just turned the hold time up to 10 seconds, and Matt TeamViewer-ed into our lower experiment computer. We opened up a notepad text file; he asked if we were going for 10 seconds; we went for it; and we saw fringes begin to show up after a couple minutes. I was super excited. After that, it was turning up the hold time to 15 seconds and letting it run over lunch, while we went to House of Curries and ate our Indian food in suspense and texting Holger. After that, running long interferometer hold times became like a very suspenseful but much too slow movie, and we lost our sparkle for long holds. And exactly then...

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Quantum-classical hypothesis tests in macroscopic matter-wave interferometry

Cited by 30 publications

References 46 publications

Particle mixing and the emergence of classicality: A spontaneous-collapse-model view

Particle mixing and the emergence of classicality: A spontaneous-collapse-model view

Stern-Gerlach Interferometry for Tests of Quantum Gravity and General Applications

Lattice Atom Interferometry in an Optical Cavity

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