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SUMMARY:N-point correlation functions on ancilla-free quantum circuits and
  neural networks
DTSTART;VALUE=DATE-TIME:20261011T065000Z
DTEND;VALUE=DATE-TIME:20261011T071000Z
DTSTAMP;VALUE=DATE-TIME:20261005T114423Z
UID:indico-contribution-2814@indico.itp.ac.cn
DESCRIPTION:Speakers: 啸洋 王 ()\nThe n-point real-time correlation fun
 ction is pivotal for establishing connections between experimental observa
 tions and theoretical predictions using field theories. Conventional metho
 ds for computing n-point correlation functions on quantum computers genera
 lly require an ancilla qubit that controls the entire system -- an approac
 h that poses challenges for digital quantum devices with limited qubit con
 nectivity\, as well as for analog quantum platforms lacking controlled ope
 rations. Here\, we introduce a method to compute n-point correlation funct
 ions using only unitary evolutions on the system of interest\, thereby eli
 minating the need for ancillas and the control operations. We demonstrate 
 our protocol on IBM quantum hardware up to 12 qubits to measure the single
 -particle spectrum of the Schwinger model and the out-of-time-order correl
 ator (OTOC) in the transverse-field Ising model\, where the noiseless simu
 lation results are successfully reproduced from the noisy hardware. Additi
 onally\, I will talk about our recent work on predicting the long-time dyn
 amics of the correlation function from short-time quantum data using Neura
 lODE.\n\nhttps://indico.itp.ac.cn/event/437/contributions/2814/
LOCATION:会议楼2 CXII103
URL:https://indico.itp.ac.cn/event/437/contributions/2814/
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