ivette fuentes university of nottingham
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RELATIVISTIC QUANTUM INFORMATION PROCESSING WITH MOVING CAVITIES. Ivette Fuentes University of Nottingham. relativistic quantum information and metrology. http:// rqinottingham.weebly.com /. postdocs Mehdi Ahmadi Jason Doukas Andrzej Dragan (now in Warsaw) Carlos Sabin Angela White - PowerPoint PPT PresentationTRANSCRIPT
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Ivette FuentesUniversity of Nottingham
RELATIVISTIC QUANTUM INFORMATION PROCESSING
WITH MOVING CAVITIES
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http://rqinottingham.weebly.com/
relativistic quantum information and metrology
postdocsMehdi AhmadiJason DoukasAndrzej Dragan (now in Warsaw)Carlos SabinAngela White
PhD studentsNicolai FriisAntony LeeLuke Westwood
project studentKevin Truong
collaboratorsDavid Bruschi (Leeds)Tony Downes (Queensland)Daniele Faccio (Herriot-Watt)Marcus Huber (Bristol/Barcelona)Göran Johansson (Chalmers)Jorma Louko (Nottingham)Enrique Solano (Bilbao)Tim Ralph (Queensland)Silke Weinfurtner (SISSA, Trieste)
FUNDING: EPSRC (THANKS!!!!)
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relativistic quantum informationINFORMATION THEORY
superposition
entanglement
CNOT
QUANTUM PHYSICS
computation
communication
RELATIVITY
causality
geometry
REAL WORLD
EXPERIMENTS
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real world experimentsquantum communication
PHOTONS HAVE NO NON-RELATIVISTIC APPROXIMATION
spacebased experiments
Rideout, et. al. arXiv:1206.4949
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relativistic quantum information
•information in a relativistic quantum world
• cavities
• detectors
• localized wave-packets
•gravity effects on quantum properties
•get real: earth-based and space-based experiments
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entanglement
entangled pair
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inertial cavity
field equation
solutions: plane waves+ boundary
creation and annihilation operators
Minkowski coordinates
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uniformly accelerated cavity
Klein-Gordon takes the same form
Rindler coordinates
Bogoliubov transformations
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entangling moving cavities in non-inertial frames Downes, Fuentes & Ralph PRL 2011
ability to entangle: depends on acceleration
entanglement preserved: inertial or uniform acceleration motion
entangle two cavities:one inertial and one accelerated
idea
results
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non-uniform motionBruschi, Fuentes & Louko PRD (R) 2011
Bogoliubov transformations
acceleration length
computable transformations
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covariance matrix formalism
covariance matrix: information about the state
symplectic matrix: evolution
computable measures of bipartite and multipartite entanglement
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Friis and Fuentes JMO (invited) 2012
general symplectic matrix
general trajectories
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entanglement: negativity
Friis, Bruschi, Louko & Fuentes PRD 2012 Friis and Fuentes JMO 2012 Bruschi, Louko, Faccio & Fuentes 2012
entanglement generated
initial separable squeezed state
general trajectoriescontinuous motion including circular acceleration
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motion and gravity create entanglement
non-uniform motion creates entanglement
gravity creates entanglement
results
single cavity
Friis, Bruschi, Louko, Fuentes PRD (R) 2012
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entanglement resonancesBruschi, Lee, Dragan, Fuentes, Louko arXiv:1201.0663
Bruschi, Louko, Faccio & Fuentes 2012
Entanglement vs.number of oscillations and period of oscillation
amount of entanglement
entanglement resonance
total segment time
trajectory details
Also: entanglement resonance without particle creationobservable by mechanical means
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quantum gates
the relativistic motion ofquantum systems can be usedto produce quantum gates
two-mode squeezerbeam splittermulti-qubit gates:Dicke statesMulti-mode squeezer
Friis, Huber, Fuentes, Bruschi PRD 2012Bruschi, Lee, Dragan, Fuentes, Louko arXiv:1201.0663
Bruschi, Louko, Faccio & Fuentes 2012
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multipartite case
Entanglement: genuine multipartite entanglement created
dates creating Dicke states
Friis, Huber, Fuentes, Bruschi PRD 2012
resonance:
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teleporation with an accelerated partner
the fidelity of teleportation is effected by motionit is possible to correct by local rotations and trip planning
Friis, Lee, Truong, Sabin, Solano, Johansson & Fuentes 2012
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new directions: experiments
simulate field inside a cavity which travels in a spaceship using superconducting circuits
To infinity and beyond…….
Art by Philip Krantz (Chalmers)
Friis, Lee, Truong, Sabin, Solano, Johansson & Fuentes 2012
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Thank you