Events List

DateEvent TypeSpeaker
10/01/2018CCPP Brown BagDavid Hogg [ + ]
10/01/2018Blanton Tinker Pullen Blanton Tinker Pullen [ + ]
10/01/2018Informal Astro TalkJaiyul Yoo [ + ]
10/02/2018Modjaz Group MtgModjaz Group Mtg [ + ]
10/02/2018Astro SeminarJeremiah Murphy [ + ]
10/03/2018Astroparticle Group MeetAstro Particle Group Mtg [ + ]
10/03/2018HEP SeminarConnor Behan [ + ]
10/03/2018Astro PhAstro Ph [ + ]
10/04/2018Physics Dept ColloquiumWill Farr [ + ]
10/05/2018SPS Mentor MixerSPS Mentor/Mentee Mixer [ + ]
10/05/2018NYU-CCA LSS Group MtgNYU-CCA LSS Group Mtg [ + ]
10/05/2018Grad Student SympGraduate Student Symposium [ + ]
10/08/2018No Brown Bag [ + ]
10/08/2018Blanton Tinker Pullen Blanton Tinker Pullen [ + ]
10/09/2018Modjaz Group MtgModjaz Group Mtg [ + ]
10/09/2018Astro SeminarElisa Chisari [ + ]
10/10/2018Astroparticle Group MeetAstro Particle Group Mtg [ + ]
10/10/2018HEP SeminarJacob Sonnenschein [ + ]
10/10/2018Astro PhAstro Ph [ + ]
10/11/2018Physics Dept ColloquiumMichel Devoret [ -- ]

Title: Catching and Reversing a Quantum Jump Mid-flight
Description: Quantum physics differs fundamentally from classical physics in that the measurement of a given quantity cannot always give certain results, even in the ideal case where both the preparation and the measurement of the system is perfect. This idea is epitomized in the phenomenon of quantum jumps, first hypothesized by Bohr in his description of the radiation emitted by an excited hydrogen atom, and now routinely observed in the laboratory on a single quantum entity. Quantum jumps are fundamentally random: the time at which they occur cannot be predicted. However, modern measurement theory allows that it is possible to obtain an advance warning signal that the jump is about to occur, and consequently, that it is possible to reverse it if it was initiated by a coherent drive. We have successfully caught and reversed a jump [1] by implementing the indirect QND measurement of a superconducting artificial atom that undergoes a transition from its ground state G to a dark state D. This is achieved by monitoring the occupancy of an auxiliary bright level B coupled to G through a Rabi drive. Our experimental results, in agreement with the predictions of quantum trajectories theory with essentially no adjustable parameters, provide new ground for the exploration of real-time intervention techniques in the control of quantum systems, such as early detection of error syndromes for computation and sensing. More generally, our results provide support to the point of view that a single system under continuous, efficient observation is characterized by a time-dependent wavefunction inferred from the record of previous measurement outcomes, and whose meaning is that of an objective, generalized degree of freedom. [1] Z. Minev, S.O. Mundhada, S. Shankar, P. Reinhold, R. Guttierez, R.J. Schoelkopf, M. Mirrahimi, H. Carmichael, M.H. Devoret arXiv:1803.00545. (4:00 PM - 5:00 PM, 726 Broadway, 940, CCPP Seminar)
10/12/2018MacFadyen Group MtgMacFadyen Group Mtg [ + ]
10/12/2018Astro PhAstro Ph [ + ]
10/12/2018ISCISC [ + ]
10/15/2018CCPP Brown BagMassimo Porrati [ + ]
10/15/2018Blanton Tinker Pullen Blanton Tinker Pullen [ + ]
10/16/2018Modjaz Group MtgModjaz Group Mtg [ + ]
10/16/2018Astro SeminarAndrey Timokhin [ + ]
10/16/2018Special SeminarAlex Vilenkin [ + ]
10/17/2018Astroparticle Group MeetAstro Particle Group Mtg [ + ]
10/17/2018HEP SeminarJesse Thaler [ + ]
10/17/2018Astro PhAstro Ph [ + ]
10/18/2018Physics Dept ColloquiumEric Vanden Eijnden [ + ]
10/19/2018NYU-CCA LSS Group MtgNYU-CCA LSS Group Mtg [ + ]
10/19/2018Special HET SeminarAlessandro Sfondrini [ + ]
10/19/2018ISCISC [ + ]
10/22/2018CCPP Brown BagAnthony Pullen [ + ]
10/22/2018Informal Astro TalkGabrijela Zaharijas [ + ]
10/22/2018Blanton Tinker Pullen Blanton Tinker Pullen [ + ]
10/23/2018Modjaz Group MtgModjaz Group Mtg [ + ]
10/23/2018Astro SeminarMatteo Cantiello [ + ]
10/24/2018Astroparticle Group MeetAstro Particle Group Mtg [ + ]
10/24/2018HEP SeminarEliezer Rabinovici [ + ]
10/24/2018Astro PhAstro Ph [ + ]
10/25/2018Physics Dept ColloquiumMariangela Lisanti [ + ]
10/26/2018ISCISC [ + ]
10/29/2018CCPP Pizza SocialPizza [ + ]
10/29/2018Blanton Tinker Pullen Blanton Tinker Pullen [ + ]
10/30/2018Modjaz Group MtgModjaz Group Mtg [ + ]
10/30/2018Astro SeminarMichele Bannister [ + ]
10/31/2018Astroparticle Group MeetAstro Particle Group Mtg [ + ]
10/31/2018HEP SeminarChris Hull [ + ]
10/31/2018Astro PhAstro Ph [ + ]