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Home Challenges for Witnessing Quantum Aspects of
Gravity in a Lab

28. Mar 2023

Challenges for Witnessing Quantum Aspects of
Gravity in a Lab

June 7-11, 2021 (by videoconference)

Zoom ID: 961 2842 0825

Password: gravity

Please send an e-mail to thiago AT ictp-saifr.org, if you have any access problem.

CODE OF CONDUCT (Zoom protocol): click HERE

ICTP-SAIFR, São Paulo, Brazil

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Understanding gravity in the framework of quantum mechanics is one of the significant challenges in modern physics. Along this line, a primary question is whether gravity is a quantum entity subject to quantum mechanical rules. Despite the purported weakness of gravity, the phase evolution induced by the gravitational interaction of two-micron size test masses in adjacent matter-wave interferometers can detectably entangle them via the exchange of graviton mediation even when they are placed far enough apart to keep Casimir-Polder forces at bay. This prescription for witnessing entanglement certifies gravity as a coherent quantum mediator through simple correlation measurements between two spins: one embedded in each test mass known as a QGEM (quantum gravity induced entanglement of masses) protocol. This workshop will discuss various theoretical and experimental challenges to conceive the QGEM protocol in a lab that will require an unprecedented level of accuracy in witnessing the quantum nature of one of nature’s weakest interactions.

There is no registration fee.

Speakers:

Nancy Aggarwal (Northwestern University, USA): Room temperature optomechanical squeezing

Markus Arndt (University of Vienna, Austria): Universal matter-wave interferometry: opportunity and challenges in probing quantum physics at the interface to gravity

Markus Aspelmeyer (University of Vienna, Austria): Gravitational coupling of microscopic source masses: challenges for future quantum Cavendish experiments

Peter Barker (University College London, UK):  Charged levitated nano-oscillators for testing macroscopic quantum mechanics

Chas Blakemore (Stanford University, USA): First search for new long range forces at the micron scale using optically levitated microspheres

Sougato Bose (University College London, UK): Quantum Nature of Gravity in the Lab: Assumptions, Implementation and Applications on the Way

Daniel Carney (Lawrence Berkley lab, USA): Theory implications from tabletop gravity experiments

N.D. Hari Dass (Institute of Mathematical Sciences – Chennai, India): Simple experiments to probe parity violation in Gravitation, and their theoretical implications

Brian D’ Urso (Montana University, USA ): Magneto-Gravitational Trapping of SiC Particles Containing Si-Vacancy Centers

Ron Folman ( Ben Gurion University, Israel ): Matter-wave interferometers on the atom chip

Gerald Gabriele (Northwestern University, USA): One-Particle Quantum Cyclotron

Andrew Geraci (Northwestern University, USA): Looking for “fifth forces”, dark matter, and quantum gravity with optomechanical sensors

Jan Harms (Gran Sasso Institute, Italy): Terrestrial gravity fluctuations in GW detectors

Jack Harris ( Yale University, USA ): Measuring the higher-order phonon statistics in a nanogram volume of superfluid helium

Timothy Kovachy ( Northwestern University, USA): Probing gravity nonlocally with macroscopically delocalized atom interferometers

Claus Laemmerzahl (University of Bremen, Germany): Effects of space-time fluctuations on quantum systems

Tongcang Li  (Purdue University, USA): Ultrasensitive torque detection with an optically levitated nanoparticle

Yair Margalit ( MIT, USA ): Towards testing quantum gravity using the full-loop Stern-Gerlach interferometer

Ryan Marshman ( University College London, UK ): The design and use of Stern-Gerlach interferometry for Gravitational Experiments

Samir Mathur (Ohio State University, USA): Contrasting the fuzzball and wormhole paradigms for resolving the black hole information paradox

Anupam Mazumdar (University of Groningen, The Netherlands): Quantum test of Gravity by colliding Schrödinger’s kittens

David Moore ( Yale University, USA ): Progress towards the quantum measurement regime with optically levitated nanogram-scale masses

Gavin Morley ( Warwick University, UK ): Levitating nanodiamond experiments towards a test of quantum gravity

Cristian Panda (Berkley, USA): Probing the interplay of quantum mechanics and gravity using a trapped atom interferometer

Maulik Parikh (Arizona State University, USA): The Noise of Gravitons

Igor Pikovski (Stockholm University, Sweden): Quantum optics at the interface with gravity

Martin Plenio (University of Ulm, Germany): Towards Robust Interferometry with Massive Particles

Simone Rijavec (University of Oxford): Decoherence effects in non-classicality tests of gravity

Carlo Rovelli ( Aix-Marseille University, France ): What do the Gravitational Entanglement Lab Experiments Teach us about Quantum Spacetime

Benjamin Stickler (University of Duisburg-Essen, Germany): Quantum rotations of nanoparticles

Jacob Taylor (NIST-Baltimore, USA): Quantum information-driven tests of gravitationally-mediated entanglement

Marko Toros ( University of Glasgow, UK): Relative Acceleration Noise Mitigation for Nanocrystal Matter-wave Interferometry: Application to Entangling Masses via Quantum Gravity

Hendrik Ulbricht (University of Southampton, UK): Probing gravity of quantum systems in the paradigm of levitated mechanics

Vlatko Vedral ( Oxford University, UK ): Different degrees of reliability of lab-based tests of quantum aspects of gravity

Kathryn Zurek (Caltech, USA): Observational consequences of quantum gravity in interferometers

Organizers:

Sougato Bose (University College London, UK)

Andrew Geraci ( Northwestern University, USA)

Anupam Mazumdar (University of Groningen, The Netherlands)

Registration

Announcement

Online Registration is now closed

Program

Workshop Program (CEST Time) :PDF updated on June 9, 2021

Workshop Program (BRT Time) : PDF updated on June 9, 2021

List of Abstracts: PDF updated on June 9, 2021

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Photos

Videos & Files

2021-06-07

09:05 - Carlo Rovelli (Aix-Marseille University, France):
What do the Gravitational Entanglement Lab Experiments Teach us about Quantum Spacetime

Attachment

09:35 - Sougato Bose (University College London, UK):
Quantum Nature of Gravity in the Lab: Assumptions, Implementation and Applications on the Way

10:05 - Samir Mathur (Ohio State University, USA):
Contrasting the fuzzball and wormhole paradigms for resolving the black hole information paradox

11:15 - Jan Harms (Gran Sasso Institute, Italy):
Terrestrial gravity fluctuations in GW detectors

11:45 - Claus Laemmerzahl (University of Bremen, Germany):
Effects of space-time fluctuations on quantum systems

12:15 - Kathryn Zurek (Caltech, USA):
Observational consequences of quantum gravity in interferometers

12:45 - Maulik Parikh (Arizona State University, USA):
The Noise of Gravitons

13:15 - Daniel Carney / Anupam Mazumdar / David Moore (Lawrence Berkley lab, USA / University of Groningen, The Netherlands / Yale University, USA):
Panel Discussion

2021-06-08

09:00 - Markus Arndt (University of Vienna, Austria):
Universal matter-wave interferometry: opportunity and challenges in probing quantum physics at the interface to gravity

Attachment

09:30 - Yair Margalit (MIT, USA):
Towards testing quantum gravity using the full-loop Stern-Gerlach interferometer

10:00 - Gerald Gabriele (Northwestern University, USA):
One-Particle Quantum Cyclotron

11:00 - Vlatko Vedral (Oxford University, UK):
Different degrees of reliability of lab-based tests of quantum aspects of gravity

11:30 - Anupam Mazumdar (University of Groningen, The Netherlands):
Quantum test of Gravity by colliding Schrödinger’s kittens

12:00 - Daniel Carney (Lawrence Berkley lab, USA):
Theory implications from tabletop gravity experiments

12:30 - Markus Aspelmeyer / Sougato Bose / Jacob Taylor (University of Vienna, Austria / University College London, UK / NIST-Baltimore, USA):
Panel Discussion

2021-06-09

09:00 - Martin Plenio (University of Ulm, Germany):
Towards Robust Interferometry with Massive Particles

Attachment

09:30 - Ryan Marshman (University College London, UK):
The design and use of Stern-Gerlach interferometry for Gravitational Experiments

10:00 - Gavin Morley (Warwick University, UK):
Levitating nanodiamond experiments towards a test of quantum gravity

Attachment

11:00 - Benjamin Stickler (Univ. Duisburg-Essen):
Quantum rotations of nanoparticles

11:30 - Marko Toros (University of Glasgow, UK):
Relative Acceleration Noise Mitigation for Nanocrystal Matter-wave Interferometry: Application to Entangling Masses via Quantum Gravity

12:00 - Jacob Taylor (NIST-Baltimore, USA):
Quantum information-driven tests of gravitationally-mediated entanglement

12:30 - Igor Pikovski (Stockholm University, Sweden):
Quantum optics at the interface with gravity

13:00 - Peter Barker / Ron Folman (University College London, UK / Ben Gurion University, Israel):
Panel Discussion

2021-06-10

08:30 - Markus Aspelmeyer (University of Vienna, Austria):
Gravitational coupling of microscopic source masses: challenges for future quantum Cavendish experiments

09:00 - Hendrik Ulbricht (University of Southampton, UK):
Probing gravity of quantum systems in the paradigm of levitated mechanics

09:30 - David Moore (Yale University, USA):
Progress towards the quantum measurement regime with optically levitated nanogram-scale masses

10:30 - Timothy Kovachy (Northwestern University, USA):
Probing gravity nonlocally with macroscopically delocalized atom interferometers

11:00 - Jack Harris (Yale University, USA):
Measuring the higher-order phonon statistics in a nanogram volume of superfluid helium

11:30 - Andrew Geraci (Northwestern University, USA):
Looking for “fifth forces”, dark matter, and quantum gravity with optomechanical sensors

12:00 - Chas Blakemore (Stanford University, USA):
First search for new long range forces at the micron scale using optically levitated microspheres

Attachment

12:30 - Ron Folman (Ben Gurion University, Israel):
Matter-wave interferometers on the atom chip

13:00 - Vlatko Vedral / Hendrik Ulbricht (Oxford University, UK / University of Southampton, UK):
Panel Discussion

2021-06-11

08:30 - Peter Barker (University College London, UK):
Charged levitated nano-oscillators for testing macroscopic quantum mechanics

09:00 - N.D. Hari Dass (Institute of Mathematical Sciences – Chennai, India):
Simple experiments to probe parity violation in Gravitation, and their theoretical implications

Attachment

09:30 - Simone Rijavec (University of Oxford):
Decoherence effects in non-classicality tests of gravity

Attachment

10:00 - Tongcang Li (Purdue University, USA):
Ultrasensitive torque detection with an optically levitated nanoparticle

11:00 - Brian D’ Urso (Montana University, USA):
Magneto-Gravitational Trapping of SiC Particles Containing Si-Vacancy Centers

Attachment

11:30 - Cristian Panda (Berkley, USA):
Probing the interplay of quantum mechanics and gravity using a trapped atom interferometer

12:00 - Nancy Aggarwal (Northwestern University, USA):
Room temperature optomechanical squeezing

12:30 - Sougato Bose / Andrew Geraci / Anupam Mazumdar (University College London, UK / Northwestern University, USA / University of Groningen, The Netherlands):
Panel Discuission

Close

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Additional Information

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