rainer kaltenbaek - custom.cvent.com · ljubljana science goals ii/iii 09.04.2019 nasa fund. phys.,...
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A quantum physics platform in spaceRainer Kaltenbaek
FMFLjubljana
Science goals I/III
09.04.2019 NASA Fund. Phys., Washington
Quantum to ClassicalTransition (?)
SCIENCE CASE DECOHERENCE OPEN/CLOSED CONCL. THANKSEXPERIMENTS CRITICALSPACE NEW CONF. NEWMAQRO
FMFLjubljana
Science goals II/III
09.04.2019 NASA Fund. Phys., Washington
Gravitational wavebackground
SCIENCE CASE DECOHERENCE OPEN/CLOSED CONCL. THANKSEXPERIMENTS CRITICALSPACE NEW CONF. NEWMAQRO
LIGO
FMFLjubljana
Science goals III/III
09.04.2019 NASA Fund. Phys., Washington
Quantum gravity?New physics?
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A. Belenchia et al. PRD 98, 126009 (2018)
FMFLjubljana
Collapse models
09.04.2019 NASA Fund. Phys., Washington
Introduce mechanism todestroy superpositions
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A. Bassi & H. Ulbricht, J. Phys.: Conf. Series 504, 012023 (2014)
FMFLjubljana
Collapse models
09.04.2019 NASA Fund. Phys., Washington
Introduce mechanism todestroy superpositions
Clear deviations expected:m > 109 – 1010 amu
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Coupling to the environment
09.04.2019 NASA Fund. Phys., Washington
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Coupling to the environment
09.04.2019 NASA Fund. Phys., Washington
SCIENCE CASE DECOHERENCE OPEN/CLOSED CONCL. THANKSEXPERIMENTS CRITICALSPACE NEW CONF. NEWMAQRO
FMFLjubljana
Coupling to the environment
09.04.2019 NASA Fund. Phys., Washington
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Experimental tests
09.04.2019 NASA Fund. Phys., Washington
104 atomic mass units
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S. Eibenberger et al., PCCP 15, 14696 (2013)
FMFLjubljana
How massive can our particles be?
09.04.2019 NASA Fund. Phys., Washington
Heavier particles require longer free fall
record Drop tower? SPACE?
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Why go to space?
09.04.2019 NASA Fund. Phys., Washington
Rockets/parabolic flightsminutes of free fall
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Why go to space?
09.04.2019 NASA Fund. Phys., Washington
Drop tower, Einstein elevatorup to 9s free fall
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Progress in space technology
09.04.2019 NASA Fund. Phys., Washington
GAIA (Global AstrometricInterferometer for Astrophysics) LISA Pathfinder
(launched 03/12/2015)
Herschel & Planck Telescopes
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Progress in space technology
09.04.2019 NASA Fund. Phys., Washington
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MAQRO – suggested experiments
09.04.2019 NASA Fund. Phys., Washington
Free expansion of the wavefunction Matter-wave interference
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Before QPPF study: passive radiative cooling
09.04.2019 NASA Fund. Phys., Washington
+ Low vibrations+ “unlimited” lifetime+ Outgassing to space
- Electron bombardment- Not easily testable- Outgassing plume
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A. Pilan Zanoni et al. Appl. Therm. Egin. 107, 689 (2016)
FMFLjubljana
Open to space environment(?) I/II
09.04.2019 NASA Fund. Phys., Washington
J.I. Thorpe et al, J. Phys.: Conf. Ser. 840, 012007 (2017)
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Open to space environment(?) I/II
09.04.2019 NASA Fund. Phys., Washington
J.I. Thorpe et al, J. Phys.: Conf. Ser. 840, 012007 (2017)
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Open to space environment(?) II/II
09.04.2019 NASA Fund. Phys., Washington
Ion densitywake behind disk
Electron densityno wake
Plasma density behind 1.5m diam. disk
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New cooling & vacuum approach
09.04.2019 NASA Fund. Phys., Washington
Payload inside a box• getter film • outgassing to space(?)
Passive cooling (V-grooves)+ hydrogen sorption cooler=> 20K
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New orbit configuration
09.04.2019 NASA Fund. Phys., Washington
Ariane 6direct launch to L2
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State-of-the-art experimental results
09.04.2019 NASA Fund. Phys., Washington
Coherent scattering into cavityBig step towards ground-state cooling
U. Delic et al., PRL 122, 123602 (2019) - Aspelmeyer groupD. Windey et al., PRL 122, 123601 (2019) - Novotny group
U. Delic et al., PRL 122, 123602 (2019)
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Critical issues I/II
09.04.2019 NASA Fund. Phys., Washington
To avoid gas collisions:Pressure: ≲ 𝟏𝟎−𝟏𝟑Pa
(for fused silica)
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Critical issues II/II
09.04.2019 NASA Fund. Phys., Washington
Particle loadingPaul Trapp
Particles coated on
surface
Charge / mass selector
UV source
Guiding electrodes
TBD Batch selector
• Desorb particles• Trap & characterize• Guide to experiment• Discharge• Optically trap
SCIENCE CASE DECOHERENCE OPEN/CLOSED CONCL. THANKSEXPERIMENTS CRITICALSPACE NEW CONF. NEWMAQRO
FMFLjubljana
Critical issues II/II
09.04.2019 NASA Fund. Phys., Washington
Particle loadingPaul Trapp
Particles coated on
surface
Charge / mass selector
UV source
Guiding electrodes
TBD Batch selector
Option: Replace surface coating
with a MEMS modulator
• Desorb particles• Trap & characterize• Guide to experiment• Discharge• Optically trap
SCIENCE CASE DECOHERENCE OPEN/CLOSED CONCL. THANKSEXPERIMENTS CRITICALSPACE NEW CONF. NEWMAQRO
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Conclusions
• Tests of macroscopic quantum physics as a ”future science idea“
• Performed CDF study
• overall feasibility confirmed but 2 critical issues need addressing
• Key technologies need focused technology development
• CDF proposed possible launch by ~2038
• May be possible to speed up to ~2034
09.04.2019 NASA Fund. Phys., Washington
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THANKS
09.04.2019 NASA Fund. Phys., Washington
MQES study (ESA contract Po P5401000400)NanoTrapS project (ESA contract4000105799/127NL/Cbi)QPPF CDF Study 2018
Austrian Research Promotion Agency (MAQROsteps, Project no. 840089)(ULE-Cavity-Access, Project no. 854036)(QuantumShield, Project no. 865996)
QTSpace COST action (CA15220)10/16 – 10/2026 countries
www.maqro-mission.org
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QPPF CDF Study – Final Report (2019): http://sci.esa.int/future-missions-department/61074-cdf-study-report-qppf/