Publications
Preprints
State Expansion of a Levitated Nanoparticle in a Dark Harmonic Potential
E. Bonvin, L. Devaud, M. Rossi, A. Militaru, L. Dania, D. S. Bykov, O. Romero-Isart, T. E. Northup, L. Novotny, and M. Frimmer
arXiv:2312.13111
Quantum Control of Continuous Systems via Nonharmonic Potential Modulation
P. T. Grochowski, H. Pichler, C. A. Regal, and O. Romero-Isart
arXiv:2311.16819
Phase separation of a repulsive two-component Fermi gas at the two-to three-dimensional crossover
P. T. Grochowski, M.-I. Trappe, T. Karpiuk, K. Rzążewski
arXiv:2311.05963
Wigner Analysis of Particle Dynamics in Wide Nonharmonic Potentials
A. Riera-Campeny, M. Roda-Llordes, P. T. Grochowski, and O. Romero-Isart
arXiv:2307.14106
Universality of quantum time dilation
K. Dębski, P. T. Grochowski, R. Demkowicz-Dobrzański, A. Dragan
arXiv:2211.02425
2024
Quantum time dilation in a gravitational field
J. Paczos, K. Dębski, P. T. Grochowski, A. R. H. Smith, and A. Dragan
to appear in Quantum
Numerical Simulation of Large-Scale Nonlinear Open Quantum Mechanics
M. Roda-Llordes, D. Candoli, P. T. Grochowski, A. Riera-Campeny, T. Agrenius, J. J. Garca-Ripoll, C. Gonzalez-Ballestero, and O. Romero-Isart
Phys. Rev. Research 6, 013262 (2024)
Cavity-mediated Long-range Interactions in Levitated Optomechanics
J. Vijayan, J. Piotrowski, C. Gonzalez-Ballestero, K. Weber, O. Romero-Isart, and L. Novotny
Nat. Phys. (2024). https://doi.org/10.1038/s41567-024-02405-3
Attosecond Physics and Quantum Information Science
M. Lewenstein, N. Baldelli, U. Bhattacharya, J. Biegert, M. F. Ciappina, U. Elu, T. Grass, P. T. Grochowski, A. Johnson, Th. Lamprou, A. S. Maxwell, A. Ordóñez, E. Pisanty, J. Rivera-Dean, P. Stammer, I. Tyulnev, and P. Tzallas
In: Argenti, L., Chini, M., Fang, L. (eds) Proceedings of the 8th International Conference on Attosecond Science and Technology (2024)
Strongly Coupled Spin Waves and Surface Acoustic Waves at Room Temperature
Y. Hwang, J. Puebla, K. Kondou, C. Gonzalez-Ballestero, H. Isshiki, C. Sánchez Muñoz, L. Liao, F. Chen, W. Luo, S. Maekawa, and Y. Otani
Phys. Rev. Lett. 132, 056704 (2024)
Fast Quantum Interference of a Nanoparticle via Optical Potential Control
L. Neumeier, M. Ciampini, O. Romero-Isart, M. Aspelmeyer, and N. Kiesel
Proc. Natl. Acad. Sci. U.S.A. 121, e2306953121 (2024)
Macroscopic Quantum Superpositions in a Wide Double-Well Potential
M. Roda-Llordes, A. Riera-Campeny, D. Candoli, P. T. Grochowski, and O. Romero-Isart
Phys. Rev. Lett. 132, 023601 (2024)
2023
Quantum Electrodynamics with a Nonmoving Dielectric Sphere: Quantizing Lorenz-Mie Scattering
P. Maurer, C. Gonzalez-Ballestero, and O. Romero-Isart
J. Opt. Soc. Am. B 40, 3137 (2023)
Quantum Theory of Light Interaction with a Lorenz-Mie Particle: Optical Detection and Three-Dimensional Ground-State Cooling
P. Maurer, C. Gonzalez-Ballestero, and O. Romero-Isart
Phys. Rev. A 108, 033714 (2023)
Suppressing Recoil Heating in Levitated Optomechanics using Squeezed Light
C. Gonzalez-Ballestero, J. A. Zielińska, M. Rossi, A. Militaru, M. Frimmer, L. Novotny, P. Maurer, and O. Romero-Isart
PRX Quantum 4, 030331 (2023)
Generation of Spin-Wave Pulses by Inverse Design
S. Casulleras, S. Knauer, Q. Wang, O. Romero-Isart, A. V. Chumak, and C. Gonzalez-Ballestero
Phys. Rev. Applied 19, 064085 (2023)
Levitated Optomechanics with Meta-Atoms
S. Lepeshov, N. Meyer, P. Maurer, O. Romero-Isart, and R. Quidant
Phys. Rev. Lett. 130, 233601 (2023)
Simultaneous Ground-State Cooling of Two Mechanical Modes of a Levitated Nanoparticle
J. Piotrowski, D. Windey, J. Vijayan, C. Gonzalez-Ballestero, A. de los Ríos Sommer, N. Meyer, R. Quidant, O. Romero-Isart, R. Reimann, and L. Novotny
Nat. Phys. 19, 1009 (2023)
Interaction Between an Optically Levitated Nanoparticle and Its Thermal Image: Internal Thermometry via Displacement Sensing
T. Agrenius, C. Gonzalez-Ballestero, P. Maurer, and O. Romero-Isart
Phys. Rev. Lett. 130, 093601 (2023) (See article talk)
Time-of-flight Quantum Tomography of an Atom in an Optical Tweezer
M. O. Brown, S. R. Muleady, W. J. Dworschack, R. J. Lewis-Swan, A. M. Rey, O. Romero-Isart, and C. A. Regal
Nat. Phys. 19, 569 (2023)
2022
Optomechanical Sideband Asymmetry Explained by Stochastic Electrodynamics
L. Novotny, M. Frimmer, A. Militaru, A. Norrman, O. Romero-Isart, and P. Maurer.
Phys. Rev. A 106, 043511 (2022)
High-harmonic spectroscopy of quantum phase transitions in a high-Tc superconductor
J. Alcalà, U. Bhattacharya, J. Biegert, M. Ciappina, U. Elu, T. Graß, P. T. Grochowski, M. Lewenstein, A. Palau, Th. P. H. Sidiropoulos, T. Steinle, I. Tyulnev
Proc. Natl. Acad. Sci. U.S.A. 119, e2207766119 (2022)
Spin-Controlled Quantum Interference of Levitated Nano Rotors
C. C. Rusconi, M. Perdriat, G. Hétet, O. Romero-Isart, and B. A. Stickler.
Phys. Rev. Lett. 129, 093605 (2022)
Ponderomotive Squeezing of Light by a Levitated Nanoparticle in Free Space
A. Militaru, M. Rossi, F. Tebbenjohanns, O. Romero-Isart, M. Frimmer, and L. Novotny.
Phys. Rev. Lett. 129, 053602 (2022)
Stability of a Magnetically Levitated Nanomagnet in Vacuum: Effects of Gas and Magnetization Damping
K. Kustura, V. Wachter, A. E. Rubio López, and C. C. Rusconi.
Phys. Rev. B 105, 174439 (2022)
Quantum Interfaces between Magnons and Paramagnetic Spins
C. Gonzalez-Ballestero, O. Romero-Isart
In Advances in Magnetics Roadmap on Spin-Wave Computing
IEEE Transactions on Magnetics 58, 0800172 (2022)
Mechanical Squeezing via Unstable Dynamics in a Microcavity
K. Kustura, C. Gonzalez-Ballestero, A. de los Ríos Sommer, N. Meyer, R. Quidant, and O. Romero-Isart.
Phys. Rev. Lett. 128, 143601 (2022) (See article talk)
Towards a Quantum Interface between Spin Waves and Paramagnetic Spin Baths
C. Gonzalez-Ballestero, T. van der Sar, O. Romero-Isart
Phys. Rev. B 105, 075410 (2022) (See article talk)
2021
Levitodynamics: Levitation and Control of Microscopic Objects in Vacuum
C. Gonzalez-Ballestero, M. Aspelmeyer, L. Novotny, R. Quidant, and O. Romero-Isart
Science 374, eabg3027 (2021)
Observing Non-Markovian Effects of Two-Level Systems in a Niobium Coaxial Resonator with a Single-Photon Lifetime of 10 milliseconds
P. Heidler, C. M. F. Schneider, K. Kustura, C. Gonzalez-Ballestero, O. Romero-Isart, G. Kirchmair
Phys. Rev. Applied 16, 034024 (2021)
Quantum Size Effects in the Magnetic Susceptibility of a Metallic Nanoparticle
M. Roda-Llordes, C. Gonzalez-Ballestero, A. E. Rubio López, M. Martínez-Pérez, F. Luis, O. Romero-Isart
Phys. Rev. B 104, L100407 (2021) (See article talk)
Large Quantum Delocalization of a Levitated Nanoparticle using Optimal Control: Applications for Force Sensing and Entangling via Weak Forces
T. Weiss, M. Roda-Llordes, E. Torrontegui, M. Aspelmeyer, O. Romero-Isart
Phys. Rev. Lett. 127, 023601 (2021) (See article talk)
Effective Quantum Dynamics Induced by a Driven Two-Level System Bath
K. Kustura, O. Romero-Isart, C. Gonzalez-Ballestero
Phys. Rev. A 103, 053709 (2021) (See article talk)
Probing Surface-Bound Atoms with Quantum Nanophotonics
D. Hümmer, O. Romero-Isart, A. Rauschenbeutel, P. Schneeweiss
Phys. Rev. Lett. 126, 163601 (2021) (See article talk)
Remote Individual Addressing of Quantum Emitters with Chirped Pulses
S. Casulleras, C. Gonzalez-Ballestero, P. Maurer, J. García-Ripoll, O. Romero-Isart
Phys. Rev. Lett. 126, 103602 (2021) (See article talk)
Fast flux control of 3D transmon qubits using a magnetic hose
O. Gargiulo, S. Oleschko, J. Prat-Camps, M. Zanner, G. Kirchmair
Appl. Phys. Lett. 118, 012601 (2021)
2020
Theory of waveguide QED with moving emitters
E. Sanchez Burillo, A. Gonzalez-Tudela, C. Gonzalez-Ballestero
Phys. Rev. A 102, 013726 (2020)
Acoustic and Optical Properties of a Fast Spinning Dielectric Nanoparticle
D. Hümmer, R. Lampert, K. Kustura, P. Maurer, C. Gonzalez-Ballestero, O. Romero-Isart
Phys. Rev. B 101, 205416 (2020)
Single-Spin Magnetomechanics with Levitated Micromagnets
J. Gieseler, A. Kabcenell, E. Rosenfeld, J. D. Schaefer, A. Safira, M. J. Schuetz, C. Gonzalez-Ballestero, C. C. Rusconi, O. Romero-Isart, M. D. Lukin
Phys. Rev. Lett. 124, 163604 (2020)
Quantum Acoustomechanics with a Micromagnet
C. Gonzalez-Ballestero, J. Gieseler, O. Romero-Isart
Phys. Rev. Lett. 124, 093602 (2020)
Theory of Quantum Acoustomagnonics and Acoustomechanics with a Micromagnet
C. Gonzalez-Ballestero, D. Hümmer, J. Gieseler, O. Romero-Isart
Phys. Rev. B 101, 125404 (2020)
2019
Radiation Reaction of a Jiggling Dipole in a Quantum Electromagnetic Field
A. E. Rubio López, O. Romero-Isart
Phys. Rev. Lett. 123, 243603 (2019)
Quantum Motional State Tomography with Non-Quadratic Potentials and Neural Networks
T. Weiss, O. Romero-Isart
Phys. Rev. Research 1, 033157 (2019)
Heating in Nanophotonic Traps for Cold Atoms
D. Hümmer, P. Schneeweiss, A. Rauschenbeutel, O. Romero-Isart
Phys. Rev. X 9, 041034 (2019)
Hybrid Architecture for Engineering Magnonic Quantum Networks
C. C. Rusconi, M. J. Schuetz, J. Gieseler, M. Lukin, O. Romero-Isart
Phys. Rev. A 100, 022343 (2019)
Theory for Cavity Cooling of Levitated Nanoparticles via Coherent Scattering: Master Equation Approach
C. Gonzalez-Ballestero, P. Maurer, D. Windey, L. Novotny, R. Reimann, O. Romero-Isart
Phys. Rev. A 100, 013805 (2019)
Cavity-Based 3D Cooling of a Levitated Nanoparticle via Coherent Scattering
D. Windey, C. Gonzalez-Ballestero, P. Maurer, L. Novotny, O. Romero-Isart, R. Reimann
Phys. Rev. Lett. 122, 123601 (2019)
Quadratic Quantum Hamiltonians: General Canonical Transformation to a Normal Form
K. Kustura, C. C. Rusconi, O. Romero-Isart
Phys. Rev. A 99, 022130 (2019)
2018
Circumventing Magnetostatic Reciprocity: A Diode for Magnetic Fields
J. Prat-Camps, P. Maurer, G. Kirchmair, O. Romero-Isart
Phys. Rev. Lett. 121, 213903 (2018)
Collective Effects in Casimir-Polder Forces
K. Sinha, B. Venkatesh, P. Meystre
Phys. Rev. Lett. 121, 183605 (2018)
Internal Quantum Dynamics of a Nanoparticle in a Thermal Electromagnetic Field: a Minimal Model
A. Rubio López, C. Gonzalez-Ballestero, O. Romero-Isart
Phys. Rev. B 98, 155405 (2018)
Landauer's formula breakdown for radiative heat transfer and nonequilibrium Casimir forces
A. Rubio López, P. M. Poggi, F. C. Lombardo, V. Giannini
Phys. Rev. A 97, 042508 (2018)
Repulsive vacuum-induced forces on a magnetic particle
K. Sinha
Phys. Rev. A 97, 032513 (2018)
Bistability in a Mesoscopic Josephson Junction Array Resonator
P. R. Muppalla, O. Gargiulo, S. Mirzaei, B. Venkatesh, M. L. Juan, L. Grünhaupt, I. M. Pop, G. Kirchmair
Phys. Rev. B 97, 024518 (2018)
On-chip quantum interference of a superconducting microsphere
H. Pino, J. Prat-Camps, K. Sinha, B. Venkatesh, O. Romero-Isart
Quantum Sci. Technol. 3, 25001 (2018)
Cooperative Effects in Closely Packed Quantum Emitters with Collective Dephasing
B. Venkatesh, M. L. Juan, O. Romero-Isart
Phys. Rev. Lett. 120, 033602 (2018)
2017
Coherent Inflation for Large Quantum Superpositions of Microspheres
O. Romero-Isart
New J. Phys. 19, 123029 (2017)
Quantum Spin Stabilized Magnetic Levitation
C. C. Rusconi, V. Pöchhacker, K. Kustura, J. I. Cirac, O. Romero-Isart
Phys. Rev. Lett. 119, 167202 (2017)
Linear Stability Analysis of a Levitated Nanomagnet in a Static Magnetic Field: Quantum Spin Stabilized Magnetic Levitation
C. C. Rusconi, V. Pöchhacker, J. I. Cirac, O. Romero-Isart
Phys. Rev. B 96, 134419 (2017)
Negative permeability in magnetostatics and its experimental demonstration
R. Mach-Batlle, A. Parra, J. Prat-Camps, S. Laut, C. Navau, À. Sánchez
Phys. Rev. B 96, 094422 (2017)
Uncovering nonperturbative dynamics of the biased sub-Ohmic spin-boson model with variational matrix product states
C. Gonzalez-Ballestero, F. A. Y. N. Schröder, A. Chin
Phys. Rev. B 96, 115427 (2017)
Ultrasensitive Inertial and Force Sensors with Diamagnetically Levitated Magnets
J. Prat-Camps, C. Teo, C. C. Rusconi, W. Wieczorek, O. Romero-Isart
Phys. Rev. Applied 8, 034002 (2017)
Ultrafocused Electromagnetic Field Pulses with a Hollow Cylindrical Waveguide
P. Maurer, J. Prat-Camps, J. I. Cirac, T. W. Hänsch, O. Romero-Isart
Phys. Rev. Lett. 119, 043904 (2017)
Enhancing the sensitivity of magnetic sensors by 3D metamaterial shells
C. Navau, R. Mach-Batlle, A. Parra, J. Prat-Camps, S. Laut, N. Del-Valle, À. Sánchez
Sci. Rep. 7, 44762 (2017)
Quantum Performance of Thermal Machines over Many Cycles
G. Watanabe, B. Venkatesh, P. Talkner, A. del Campo
Phys. Rev. Lett. 118, 50601 (2017)
2016
In situ observation of optomechanical Bloch oscillations in an optical cavity
H. Keßle, J. Klinder, B. Venkatesh, C. Georges, A. Hemmerich
New J. Phys. 18, 102001 (2016)
Ultrashort Pulses for Far-Field Nanoscopy
P. Maurer, J. I. Cirac, O. Romero-Isart
Phys. Rev. Lett. 117, 103602 (2016)
Near-field levitated quantum optomechanics with nanodiamonds
M. L. Juan, G. Molina-Terriza, T. Volz, O. Romero-Isart
Phys. Rev. A 94, 023841 (2016)
Attraction-induced dynamical stability of a Bose-Einstein condensate in a nonlinear lattice
R. Dasgupta, B. Venkatesh, G. Watanabe
Phys. Rev. A 93, 063618 (2016)
Scaling Law for Irreversible Entropy Production in Critical Systems
D. Hoang, B. Venkatesh, S. Han, J. Jo, G. Watanabe, M. Choi
Sci. Rep. 6, 27603 (2016)
Quasistatic Metamaterials: Magnetic Coupling Enhancement by Effective Space Cancellation
J. Prat-Camps, C. Navau, À. Sánchez
Adv. Mater. 28, 4898 (2016)
Nonlinear Phenomena of Ultracold Atomic Gases in Optical Lattices: Emergence of Novel Features in Extended States
G. Watanabe, B. Venkatesh, R. Dasgupta
Entropy 18, 118 (2016)
Magnetic Rigid Rotor in the Quantum Regime: Theoretical Toolbox
C. C. Rusconi, O. Romero-Isart
Phys. Rev. B 93, 054427 (2016)
2015
An optomechanical elevator: Transport of a Bloch oscillating Bose-Einstein condensate up and down an optical lattice by cavity sideband amplification and cooling
B. Venkatesh, D. H. O'Dell, J. Goldwin
Atoms 4, 2 (2015)
Strong Single-Photon Coupling in Superconducting Quantum Magnetomechanics
G. Via, G. Kirchmair, O. Romero-Isart
Phys. Rev. Lett. 114, 143602 (2015)
2014
Long-Distance Transfer and Routing of Static Magnetic Fields
C. Navau, J. Prat-Camps, O. Romero-Isart, J. I. Cirac, A. Sanchez
Phys. Rev. Lett. 112, 253901 (2014)
2013
Superconducting Vortex Lattices for Ultracold Atoms
O. Romero-Isart, C. Navau, A. Sanchez, P. Zoller, J. I. Cirac
Phys. Rev. Lett. 111, 145304 (2013)
Optomechanics assisted by a qubit: From dissipative state preparation to many-partite systems
A. C. Pflanzer, O. Romero-Isart, J. I. Cirac
Phys. Rev. A 88, 033804 (2013)
2012
Quantum Magnetomechanics with Levitating Superconducting Microspheres
O. Romero-Isart, L. Clemente, C. Navau, A. Sanchez, J. I. Cirac
Phys. Rev. Lett. 109, 147205 (2012)
Macroscopic quantum resonators (MAQRO)
R. Kaltenbaek, G. Hechenblaikner, N. Kiesel, O. Romero-Isart, K. C. Schwab, U. Johann, M. Aspelmeyer
Experimental Astronomy 34, 164 (2012)
Master-equation approach to optomechanics with arbitrary dielectrics
A. C. Pflanzer, O. Romero-Isart, J. I. Cirac
Phys. Rev. A 86, 013802 (2012)
Quantum Memory Assisted Probing of Dynamical Spin Correlations
O. Romero-Isart, M. Rizzi, C. A. Muschik, E. Polzik, M. Lewenstein, A. Sanpera
Phys. Rev. Lett. 108, 065302 (2012)
2011
Quantum superposition of massive objects and collapse models
O. Romero-Isart
Phys. Rev. A 84, 052121 (2011)
Large Quantum Superpositions and Interference of Massive Nanometer-Sized Objects
O. Romero-Isart, A. C. Pflanzer, F. Blaser, R. Kaltenbaek, N. Kiesel, M. Aspelmeyer, J. I. Cirac
Phys. Rev. Lett. 107, 020405 (2011)
Probing magnetic order in ultracold lattice gases
G. De Chiara, O. Romero-Isart, A. Sanpera
Phys. Rev. A 83, 021604 (2011)
Optically levitating dielectrics in the quantum regime: Theory and protocols
O. Romero-Isart, A. C. Pflanzer, M. L. Juan, R. Quidant, N. Kiesel, M. Aspelmeyer, J. I. Cirac
Phys. Rev. A 83, 013803 (2011)
2010
Toward quantum superposition of living organisms
O. Romero-Isart, M. L. Juan, R. Quidant, J. I. Cirac
New J. Phys. 12, 033015 (2010)
Quantum Information Processing with Quantum Zeno Many-Body Dynamics
A. Monras, O. Romero-Isart
Quantum Information and Computation 10, 201 (2010)
2009
Quantum polarization spectroscopy of correlations in attractive fermionic gases
T. Roscilde, M. Rodríguez, K. Eckert, O. Romero-Isart, M. Lewenstein, E. Polzik, A. Sanpera
New J. Phys. 11, 055041 (2009)
Preparation of decoherence-free cluster states with optical superlattices
L. Jiang, A. M. Rey, O. Romero-Isart, J. J. García-Ripoll, A. Sanpera, M. Lukin
Phys. Rev. A 79, 022309 (2009)
2008
Quantum non-demolition detection of strongly correlated systems
K. Eckert, O. Romero-Isart, M. Rodríguez, M. Lewenstein, E. Polzik, A. Sanpera
Nature Phys. 4, 50 (2008)
2007
Quantum ratchets for quantum communication with optical superlattices
O. Romero-Isart, J. J. García-Ripoll
Phys. Rev. A 76, 052304 (2007)
Transport and entanglement generation in the Bose–Hubbard model
O. Romero-Isart, K. Eckert, C. Rodó, A. Sanpera
J. Phys. A: Math. Gen. 40, 8019 (2007)
Quantum state transfer in spin-1 chains
O. Romero-Isart, K. Eckert, A. Sanpera
Phys. Rev. A 75, 050303 (2007)
Efficiency in Quantum Key Distribution Protocols with Entangled Gaussian States
C. Rodó, O. Romero-Isart, K. Eckert, A. Sanpera
Open Syst. Inf. Dyn. 14, 69 (2007)
Efficient quantum state transfer in spin chains via adiabatic passage
K. Eckert, O. Romero-Isart, A. Sanpera
New J. Phys. 9, 155 (2007)
2006
Separable Measurement Estimation of Density Matrices and its Fidelity Gap with Collective Protocols
E. Bagan, M. A. Ballester, R. D. Gill, R. Muñoz-Tapia, O. Romero-Isart
Phys. Rev. Lett. 97, 130501 (2006)
2005
Purity Estimation with Separable Measurements
E. Bagan, M. A. Ballester, R. Muñoz-Tapia, O. Romero-Isart
Phys. Rev. Lett. 95, 110504 (2005)
Prediction of protein–protein interactions using distant conservation of sequence patterns and structure relationships
J. Espadaler, O. Romero-Isart, R. M. Jackson, B. Oliva
Bioinformatics 21, 3360 (2005)