Rainer Kaltenbaek - custom.cvent.com · Ljubljana Science goals II/III 09.04.2019 NASA Fund. Phys.,...

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


Gravitational wavebackground


LIGO

FMFLjubljana

Science goals III/III


Quantum gravity?New physics?


A. Belenchia et al. PRD 98, 126009 (2018)

FMFLjubljana

Collapse models


Introduce mechanism todestroy superpositions


A. Bassi & H. Ulbricht, J. Phys.: Conf. Series 504, 012023 (2014)

FMFLjubljana

Collapse models


Introduce mechanism todestroy superpositions

Clear deviations expected:m > 109 – 1010 amu


FMFLjubljana

Coupling to the environment



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Experimental tests


104 atomic mass units


S. Eibenberger et al., PCCP 15, 14696 (2013)

FMFLjubljana

How massive can our particles be?


Heavier particles require longer free fall

record Drop tower? SPACE?


FMFLjubljana

Why go to space?


Rockets/parabolic flightsminutes of free fall


FMFLjubljana

Why go to space?


Drop tower, Einstein elevatorup to 9s free fall


FMFLjubljana

Progress in space technology


GAIA (Global AstrometricInterferometer for Astrophysics) LISA Pathfinder

(launched 03/12/2015)

Herschel & Planck Telescopes


FMFLjubljana

Progress in space technology



FMFLjubljana

MAQRO – suggested experiments


Free expansion of the wavefunction Matter-wave interference


FMFLjubljana

Before QPPF study: passive radiative cooling


+ Low vibrations+ “unlimited” lifetime+ Outgassing to space

- Electron bombardment- Not easily testable- Outgassing plume


A. Pilan Zanoni et al. Appl. Therm. Egin. 107, 689 (2016)

FMFLjubljana

Open to space environment(?) I/II


J.I. Thorpe et al, J. Phys.: Conf. Ser. 840, 012007 (2017)


FMFLjubljana

Open to space environment(?) II/II


Ion densitywake behind disk

Electron densityno wake

Plasma density behind 1.5m diam. disk


FMFLjubljana

New cooling & vacuum approach


Payload inside a box• getter film • outgassing to space(?)

Passive cooling (V-grooves)+ hydrogen sorption cooler=> 20K


FMFLjubljana

New orbit configuration


Ariane 6direct launch to L2


FMFLjubljana

State-of-the-art experimental results


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)


FMFLjubljana

Critical issues I/II


To avoid gas collisions:Pressure: ≲ 𝟏𝟎−𝟏𝟑Pa

(for fused silica)


FMFLjubljana

Critical issues II/II


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


FMFLjubljana

Critical issues II/II


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


FMFLjubljana

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



FMFLjubljana

THANKS


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


QPPF CDF Study – Final Report (2019): http://sci.esa.int/future-missions-department/61074-cdf-study-report-qppf/

Rainer Kaltenbaek - custom.cvent.com · Ljubljana Science goals II/III 09.04.2019 NASA Fund. Phys.,...

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